/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:24:01,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:24:01,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:24:01,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:24:01,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:24:01,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:24:01,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:24:01,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:24:01,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:24:01,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:24:01,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:24:01,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:24:01,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:24:01,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:24:01,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:24:01,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:24:01,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:24:01,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:24:01,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:24:01,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:24:01,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:24:01,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:24:01,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:24:01,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:24:01,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:24:01,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:24:01,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:24:01,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:24:01,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:24:01,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:24:01,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:24:01,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:24:01,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:24:01,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:24:01,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:24:01,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:24:01,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:24:01,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:24:01,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:24:01,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:24:01,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:24:01,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:24:01,708 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:24:01,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:24:01,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:24:01,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:24:01,711 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:24:01,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:24:01,711 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:24:01,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:24:01,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:24:01,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:24:01,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:24:01,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:24:01,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:24:01,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:24:01,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:24:01,715 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:24:01,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:24:01,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:24:01,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:24:01,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:24:01,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:24:01,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:24:01,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:24:01,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:24:01,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:24:01,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:24:01,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:24:01,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:24:01,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:24:01,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:24:02,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:24:02,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:24:02,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:24:02,122 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:24:02,123 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:24:02,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2020-10-28 14:24:02,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eff5ae835/17e3544b828e4903b1f2b29ca266b294/FLAGced6b2d89 [2020-10-28 14:24:02,867 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:24:02,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2020-10-28 14:24:02,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eff5ae835/17e3544b828e4903b1f2b29ca266b294/FLAGced6b2d89 [2020-10-28 14:24:03,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eff5ae835/17e3544b828e4903b1f2b29ca266b294 [2020-10-28 14:24:03,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:24:03,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:24:03,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:24:03,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:24:03,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:24:03,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:24:03" (1/1) ... [2020-10-28 14:24:03,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bff44d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03, skipping insertion in model container [2020-10-28 14:24:03,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:24:03" (1/1) ... [2020-10-28 14:24:03,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:24:03,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:24:03,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:24:03,511 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:24:03,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:24:03,547 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:24:03,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03 WrapperNode [2020-10-28 14:24:03,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:24:03,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:24:03,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:24:03,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:24:03,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03" (1/1) ... [2020-10-28 14:24:03,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03" (1/1) ... [2020-10-28 14:24:03,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03" (1/1) ... [2020-10-28 14:24:03,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03" (1/1) ... [2020-10-28 14:24:03,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03" (1/1) ... [2020-10-28 14:24:03,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03" (1/1) ... [2020-10-28 14:24:03,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03" (1/1) ... [2020-10-28 14:24:03,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:24:03,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:24:03,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:24:03,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:24:03,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:24:03,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:24:03,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:24:03,705 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:24:03,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:24:03,705 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:24:03,706 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:24:03,706 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:24:03,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:24:03,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:24:03,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:24:03,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:24:03,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:24:03,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:24:03,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:24:03,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:24:03,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:24:03,940 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:24:03,941 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 14:24:03,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:24:03 BoogieIcfgContainer [2020-10-28 14:24:03,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:24:03,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:24:03,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:24:03,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:24:03,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:24:03" (1/3) ... [2020-10-28 14:24:03,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@312956d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:24:03, skipping insertion in model container [2020-10-28 14:24:03,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:24:03" (2/3) ... [2020-10-28 14:24:03,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@312956d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:24:03, skipping insertion in model container [2020-10-28 14:24:03,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:24:03" (3/3) ... [2020-10-28 14:24:03,962 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c.p+cfa-reducer.c [2020-10-28 14:24:03,999 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:24:04,009 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:24:04,029 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:24:04,083 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:24:04,083 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:24:04,083 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:24:04,083 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:24:04,084 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:24:04,092 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:24:04,092 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:24:04,092 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:24:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-28 14:24:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:24:04,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:04,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:04,122 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1769964169, now seen corresponding path program 1 times [2020-10-28 14:24:04,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:04,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115643843] [2020-10-28 14:24:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:04,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:04,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:04,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:24:04,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:24:04,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-28 14:24:04,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:04,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:04,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:24:04,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:24:04,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:24:04,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:24:04,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:04,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:04,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:04,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:04,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:04,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:24:04,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:04,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:04,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:04,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:04,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:04,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115643843] [2020-10-28 14:24:04,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:24:04,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:24:04,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937502477] [2020-10-28 14:24:04,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:24:04,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:04,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:24:04,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:24:04,873 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-10-28 14:24:05,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:05,189 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-28 14:24:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:24:05,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:24:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:05,212 INFO L225 Difference]: With dead ends: 33 [2020-10-28 14:24:05,212 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 14:24:05,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:24:05,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 14:24:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 14:24:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 14:24:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-28 14:24:05,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-28 14:24:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:05,261 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-28 14:24:05,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:24:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-28 14:24:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:24:05,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:05,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:05,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:24:05,263 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:05,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:05,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2056777980, now seen corresponding path program 1 times [2020-10-28 14:24:05,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:05,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613672987] [2020-10-28 14:24:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:05,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:05,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:05,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:24:05,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:05,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 14:24:05,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:05,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:24:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:24:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:05,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:05,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:05,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:05,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:05,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:05,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:24:05,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:05,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:05,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:05,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:05,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:05,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:05,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613672987] [2020-10-28 14:24:05,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:24:05,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:24:05,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032405221] [2020-10-28 14:24:05,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:24:05,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:05,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:24:05,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:24:05,406 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-28 14:24:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:05,488 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-28 14:24:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:24:05,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-28 14:24:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:05,490 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:24:05,490 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 14:24:05,491 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 [2020-10-28 14:24:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 14:24:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 14:24:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 14:24:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 14:24:05,499 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-28 14:24:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:05,500 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 14:24:05,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:24:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 14:24:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:24:05,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:05,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:05,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:24:05,502 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:05,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:05,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1856505374, now seen corresponding path program 1 times [2020-10-28 14:24:05,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:05,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565047235] [2020-10-28 14:24:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:05,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:05,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:05,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:24:05,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:05,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-28 14:24:05,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:05,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:05,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:24:05,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:05,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:24:05,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:05,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:05,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:05,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:05,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:05,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:05,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:24:05,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:05,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:05,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:05,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:05,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:05,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:05,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565047235] [2020-10-28 14:24:05,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:05,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:24:05,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786741384] [2020-10-28 14:24:05,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:24:05,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:05,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:24:05,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:24:05,672 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-28 14:24:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:05,803 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-28 14:24:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:24:05,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 14:24:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:05,804 INFO L225 Difference]: With dead ends: 25 [2020-10-28 14:24:05,805 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 14:24:05,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:24:05,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 14:24:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 14:24:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 14:24:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-28 14:24:05,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-28 14:24:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:05,814 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-28 14:24:05,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:24:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-28 14:24:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:24:05,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:05,815 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:05,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:24:05,815 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1385762236, now seen corresponding path program 2 times [2020-10-28 14:24:05,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:05,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069199927] [2020-10-28 14:24:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:05,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:05,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:05,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:24:05,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:05,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-28 14:24:05,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:05,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:24:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:24:05,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:05,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:05,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:05,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:05,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:05,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:24:05,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:05,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:05,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:05,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:05,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:06,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069199927] [2020-10-28 14:24:06,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:06,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:24:06,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904418376] [2020-10-28 14:24:06,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:24:06,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:24:06,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:24:06,006 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2020-10-28 14:24:06,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:06,181 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-28 14:24:06,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:24:06,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-28 14:24:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:06,182 INFO L225 Difference]: With dead ends: 26 [2020-10-28 14:24:06,182 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 14:24:06,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:24:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 14:24:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 14:24:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 14:24:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-28 14:24:06,190 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-28 14:24:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:06,190 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-28 14:24:06,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:24:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-28 14:24:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:24:06,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:06,191 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:06,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:24:06,192 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:06,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1183156958, now seen corresponding path program 3 times [2020-10-28 14:24:06,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:06,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090226447] [2020-10-28 14:24:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:06,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:06,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:06,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:24:06,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:06,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-28 14:24:06,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:06,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:06,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:24:06,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:06,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:24:06,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:06,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:06,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:06,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:06,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:06,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:06,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:24:06,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:06,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:06,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:06,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:06,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:06,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:06,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090226447] [2020-10-28 14:24:06,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:06,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:24:06,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911490075] [2020-10-28 14:24:06,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:24:06,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:24:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:24:06,360 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-10-28 14:24:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:06,548 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-28 14:24:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:24:06,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-28 14:24:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:06,549 INFO L225 Difference]: With dead ends: 27 [2020-10-28 14:24:06,549 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 14:24:06,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:24:06,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 14:24:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 14:24:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:24:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-28 14:24:06,556 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-28 14:24:06,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:06,557 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-28 14:24:06,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:24:06,557 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-28 14:24:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:24:06,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:06,558 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:06,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:24:06,558 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:06,559 INFO L82 PathProgramCache]: Analyzing trace with hash -784726652, now seen corresponding path program 4 times [2020-10-28 14:24:06,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:06,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756685030] [2020-10-28 14:24:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:06,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:06,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:06,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:24:06,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:06,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-28 14:24:06,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:06,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:24:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:06,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:24:06,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:06,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:06,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:06,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:06,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:06,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:06,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:24:06,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:06,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:06,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:06,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:06,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:06,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:06,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756685030] [2020-10-28 14:24:06,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:06,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:24:06,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625231234] [2020-10-28 14:24:06,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:24:06,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:06,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:24:06,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:24:06,759 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-10-28 14:24:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:06,968 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-28 14:24:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:24:06,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-28 14:24:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:06,969 INFO L225 Difference]: With dead ends: 28 [2020-10-28 14:24:06,969 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 14:24:06,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:24:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 14:24:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 14:24:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 14:24:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-28 14:24:06,976 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-28 14:24:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:06,976 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-28 14:24:06,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:24:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-28 14:24:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:24:06,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:06,977 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:06,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:24:06,978 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:06,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1659576418, now seen corresponding path program 5 times [2020-10-28 14:24:06,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:06,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001764468] [2020-10-28 14:24:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:06,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:07,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:07,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:24:07,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:07,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-28 14:24:07,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:07,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:07,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:24:07,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:07,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:24:07,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:07,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:07,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:07,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:07,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:07,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:07,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:24:07,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:07,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:07,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:07,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001764468] [2020-10-28 14:24:07,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:07,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:24:07,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131563445] [2020-10-28 14:24:07,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:24:07,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:07,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:24:07,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:24:07,197 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-28 14:24:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:07,475 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-28 14:24:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:24:07,476 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-28 14:24:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:07,477 INFO L225 Difference]: With dead ends: 29 [2020-10-28 14:24:07,477 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:24:07,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:24:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:24:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 14:24:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:24:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 14:24:07,483 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-28 14:24:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:07,484 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 14:24:07,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:24:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 14:24:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:24:07,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:07,485 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:07,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:24:07,485 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1284851908, now seen corresponding path program 6 times [2020-10-28 14:24:07,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:07,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250596127] [2020-10-28 14:24:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:07,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:07,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:07,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:24:07,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:07,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 14:24:07,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:07,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:07,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:24:07,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:07,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:24:07,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:07,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:07,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:07,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:07,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:07,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:07,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:24:07,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:07,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:07,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:07,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250596127] [2020-10-28 14:24:07,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:07,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:24:07,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934094403] [2020-10-28 14:24:07,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:24:07,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:07,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:24:07,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:24:07,694 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-10-28 14:24:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:07,993 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-28 14:24:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:24:07,994 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-28 14:24:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:07,995 INFO L225 Difference]: With dead ends: 30 [2020-10-28 14:24:07,995 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 14:24:07,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:24:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 14:24:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 14:24:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:24:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 14:24:08,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-28 14:24:08,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:08,002 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 14:24:08,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:24:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 14:24:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:24:08,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:08,003 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:08,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:24:08,003 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:08,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:08,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1927150498, now seen corresponding path program 7 times [2020-10-28 14:24:08,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:08,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277923485] [2020-10-28 14:24:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:08,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:08,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:08,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:24:08,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:08,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 14:24:08,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:08,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:08,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:24:08,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:08,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:24:08,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:08,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:08,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:08,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:08,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:08,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:08,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:24:08,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:08,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:08,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:08,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:08,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:08,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:08,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277923485] [2020-10-28 14:24:08,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:08,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:24:08,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850554498] [2020-10-28 14:24:08,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:24:08,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:08,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:24:08,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:24:08,362 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-10-28 14:24:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:08,787 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-28 14:24:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:24:08,788 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-28 14:24:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:08,789 INFO L225 Difference]: With dead ends: 31 [2020-10-28 14:24:08,789 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:24:08,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:24:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:24:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 14:24:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 14:24:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-28 14:24:08,797 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-28 14:24:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:08,797 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-28 14:24:08,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:24:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-28 14:24:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:24:08,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:08,798 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:08,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:24:08,799 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:08,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1579990020, now seen corresponding path program 8 times [2020-10-28 14:24:08,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:08,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092381875] [2020-10-28 14:24:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:08,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:09,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:09,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:24:09,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:09,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-28 14:24:09,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:09,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:09,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:24:09,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:09,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:24:09,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:09,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:09,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:09,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:09,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:09,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:09,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:24:09,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:09,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:09,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:09,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:09,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:09,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:09,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092381875] [2020-10-28 14:24:09,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:09,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:24:09,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10492408] [2020-10-28 14:24:09,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:24:09,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:24:09,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:24:09,190 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2020-10-28 14:24:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:09,660 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-28 14:24:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:24:09,661 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-28 14:24:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:09,662 INFO L225 Difference]: With dead ends: 32 [2020-10-28 14:24:09,662 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:24:09,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:24:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:24:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 14:24:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:24:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-28 14:24:09,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-28 14:24:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:09,670 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-28 14:24:09,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:24:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-28 14:24:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:24:09,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:09,671 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:09,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:24:09,671 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1367803618, now seen corresponding path program 9 times [2020-10-28 14:24:09,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:09,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223119015] [2020-10-28 14:24:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:09,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:09,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:09,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:24:09,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:09,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-28 14:24:09,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:09,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:09,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:24:09,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:09,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:24:09,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:10,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:10,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:10,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:10,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:10,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:24:10,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:10,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:10,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:10,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223119015] [2020-10-28 14:24:10,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:10,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:24:10,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124252683] [2020-10-28 14:24:10,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:24:10,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:10,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:24:10,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:24:10,045 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-10-28 14:24:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:10,572 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-28 14:24:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:24:10,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-28 14:24:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:10,574 INFO L225 Difference]: With dead ends: 33 [2020-10-28 14:24:10,574 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 14:24:10,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:24:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 14:24:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 14:24:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:24:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-28 14:24:10,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-28 14:24:10,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:10,581 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-28 14:24:10,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:24:10,582 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-28 14:24:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:24:10,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:10,582 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:10,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:24:10,583 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:10,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1739874116, now seen corresponding path program 10 times [2020-10-28 14:24:10,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:10,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311703569] [2020-10-28 14:24:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:10,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:10,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:10,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:24:10,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:10,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-28 14:24:10,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:10,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:10,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:24:10,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:10,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:24:10,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:10,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:10,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:10,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:10,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:24:10,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:10,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:10,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:10,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:10,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311703569] [2020-10-28 14:24:10,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:10,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:24:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27731471] [2020-10-28 14:24:10,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:24:10,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:10,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:24:10,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:24:10,929 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 14 states. [2020-10-28 14:24:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:11,534 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-28 14:24:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:24:11,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-28 14:24:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:11,537 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:24:11,537 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 14:24:11,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:24:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 14:24:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 14:24:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 14:24:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-28 14:24:11,544 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-28 14:24:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:11,544 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-28 14:24:11,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:24:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-28 14:24:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:24:11,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:11,545 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:11,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:24:11,545 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:11,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash -706363938, now seen corresponding path program 11 times [2020-10-28 14:24:11,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:11,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853454490] [2020-10-28 14:24:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:11,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:11,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:11,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:24:11,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:11,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-28 14:24:11,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:11,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:11,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:24:11,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:11,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:24:11,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:11,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:11,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:11,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:11,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:11,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:11,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:24:11,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:11,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:11,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:11,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:11,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:11,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:11,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853454490] [2020-10-28 14:24:11,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:11,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:24:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004628265] [2020-10-28 14:24:11,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:24:11,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:11,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:24:11,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:24:11,949 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 15 states. [2020-10-28 14:24:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:12,590 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-28 14:24:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:24:12,591 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-28 14:24:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:12,592 INFO L225 Difference]: With dead ends: 35 [2020-10-28 14:24:12,592 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:24:12,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:24:12,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:24:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 14:24:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:24:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-28 14:24:12,601 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-28 14:24:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:12,602 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-28 14:24:12,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:24:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-28 14:24:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:24:12,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:12,605 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:12,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:24:12,605 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash 769667716, now seen corresponding path program 12 times [2020-10-28 14:24:12,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:12,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337547697] [2020-10-28 14:24:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:12,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:12,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:12,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:24:12,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:12,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-28 14:24:12,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:12,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:12,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:24:12,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:12,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:24:12,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:13,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:13,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:13,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:13,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:13,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:13,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:24:13,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:13,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:13,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:13,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:13,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:13,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:13,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337547697] [2020-10-28 14:24:13,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:13,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:24:13,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677291830] [2020-10-28 14:24:13,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:24:13,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:13,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:24:13,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:24:13,103 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 16 states. [2020-10-28 14:24:13,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:13,842 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-28 14:24:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:24:13,843 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-28 14:24:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:13,844 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:24:13,844 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:24:13,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:24:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:24:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 14:24:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:24:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-28 14:24:13,856 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-28 14:24:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:13,856 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-28 14:24:13,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:24:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-28 14:24:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:24:13,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:13,860 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:13,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:24:13,860 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:13,861 INFO L82 PathProgramCache]: Analyzing trace with hash -717991266, now seen corresponding path program 13 times [2020-10-28 14:24:13,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:13,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201203859] [2020-10-28 14:24:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:13,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:14,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:14,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:24:14,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:14,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-28 14:24:14,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:14,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:14,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:24:14,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:14,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:24:14,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:14,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:14,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:14,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:14,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:14,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:14,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:24:14,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:14,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:14,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:14,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201203859] [2020-10-28 14:24:14,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:14,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:24:14,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772081026] [2020-10-28 14:24:14,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:24:14,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:14,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:24:14,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:24:14,359 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 17 states. [2020-10-28 14:24:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:15,217 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-28 14:24:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:24:15,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-28 14:24:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:15,219 INFO L225 Difference]: With dead ends: 37 [2020-10-28 14:24:15,219 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 14:24:15,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:24:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 14:24:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 14:24:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:24:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-28 14:24:15,228 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-28 14:24:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:15,229 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-28 14:24:15,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:24:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-28 14:24:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:24:15,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:15,230 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:15,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:24:15,230 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:15,231 INFO L82 PathProgramCache]: Analyzing trace with hash 409220548, now seen corresponding path program 14 times [2020-10-28 14:24:15,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:15,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121432992] [2020-10-28 14:24:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:15,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:15,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:15,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:24:15,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:15,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-28 14:24:15,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:15,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:24:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:24:15,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:15,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:15,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:15,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:15,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:15,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:15,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:24:15,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:15,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:15,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:15,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:15,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121432992] [2020-10-28 14:24:15,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:15,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:24:15,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302451965] [2020-10-28 14:24:15,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:24:15,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:15,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:24:15,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:24:15,719 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 18 states. [2020-10-28 14:24:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:16,655 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-28 14:24:16,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:24:16,656 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-28 14:24:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:16,657 INFO L225 Difference]: With dead ends: 38 [2020-10-28 14:24:16,657 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 14:24:16,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:24:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 14:24:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 14:24:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:24:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-28 14:24:16,664 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-10-28 14:24:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:16,665 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-28 14:24:16,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:24:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-28 14:24:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:24:16,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:16,666 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:16,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:24:16,666 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:16,667 INFO L82 PathProgramCache]: Analyzing trace with hash 993048414, now seen corresponding path program 15 times [2020-10-28 14:24:16,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:16,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758370908] [2020-10-28 14:24:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:16,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:16,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:16,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:24:16,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:16,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-28 14:24:16,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:16,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:16,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:24:16,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:16,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:24:16,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:17,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:17,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:17,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:17,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:17,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:17,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:24:17,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:17,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:17,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:17,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:17,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758370908] [2020-10-28 14:24:17,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:17,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:24:17,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19999801] [2020-10-28 14:24:17,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:24:17,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:17,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:24:17,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:24:17,272 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 19 states. [2020-10-28 14:24:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:18,180 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-28 14:24:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:24:18,181 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-28 14:24:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:18,182 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:24:18,182 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:24:18,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:24:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:24:18,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 14:24:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 14:24:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-28 14:24:18,190 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-28 14:24:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:18,190 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-28 14:24:18,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:24:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-28 14:24:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:24:18,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:18,195 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:18,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:24:18,195 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:18,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1911843076, now seen corresponding path program 16 times [2020-10-28 14:24:18,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:18,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353817683] [2020-10-28 14:24:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:18,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:18,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:18,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:24:18,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:18,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-28 14:24:18,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:18,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:24:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:24:18,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:18,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:18,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:18,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:18,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:18,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:18,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:24:18,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:18,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:18,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:18,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353817683] [2020-10-28 14:24:18,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:18,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:24:18,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125146605] [2020-10-28 14:24:18,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:24:18,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:18,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:24:18,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:24:18,790 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 20 states. [2020-10-28 14:24:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:19,805 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-28 14:24:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:24:19,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-28 14:24:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:19,807 INFO L225 Difference]: With dead ends: 40 [2020-10-28 14:24:19,807 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:24:19,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:24:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:24:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 14:24:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:24:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-28 14:24:19,817 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-28 14:24:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:19,817 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-28 14:24:19,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:24:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-28 14:24:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:24:19,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:19,818 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:19,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:24:19,818 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash 329706526, now seen corresponding path program 17 times [2020-10-28 14:24:19,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:19,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119495833] [2020-10-28 14:24:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:19,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:20,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:20,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:24:20,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:20,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-28 14:24:20,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:20,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:24:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:24:20,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:20,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:20,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:20,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:20,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:20,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:20,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:24:20,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:20,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:20,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:20,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:20,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:20,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:20,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119495833] [2020-10-28 14:24:20,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:20,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:24:20,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115569442] [2020-10-28 14:24:20,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:24:20,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:20,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:24:20,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:24:20,440 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 21 states. [2020-10-28 14:24:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:21,487 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-28 14:24:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:24:21,488 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-28 14:24:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:21,489 INFO L225 Difference]: With dead ends: 41 [2020-10-28 14:24:21,489 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:24:21,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:24:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:24:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 14:24:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:24:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-28 14:24:21,498 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-28 14:24:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:21,498 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-28 14:24:21,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:24:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-28 14:24:21,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:24:21,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:21,499 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:21,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:24:21,499 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:21,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1471886268, now seen corresponding path program 18 times [2020-10-28 14:24:21,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:21,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634095972] [2020-10-28 14:24:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:21,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:21,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:21,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:24:21,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:21,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-28 14:24:21,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:21,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:21,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:24:21,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:21,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:24:21,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:22,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:22,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:22,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:22,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:22,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:22,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:24:22,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:22,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:22,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:22,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:22,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:22,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:22,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634095972] [2020-10-28 14:24:22,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:22,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:24:22,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687847955] [2020-10-28 14:24:22,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:24:22,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:22,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:24:22,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:24:22,147 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2020-10-28 14:24:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:23,323 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-28 14:24:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:24:23,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-28 14:24:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:23,325 INFO L225 Difference]: With dead ends: 42 [2020-10-28 14:24:23,325 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 14:24:23,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:24:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 14:24:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 14:24:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:24:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-28 14:24:23,336 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-10-28 14:24:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:23,336 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-28 14:24:23,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:24:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-28 14:24:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:24:23,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:23,337 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:23,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:24:23,337 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:23,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:23,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1486688034, now seen corresponding path program 19 times [2020-10-28 14:24:23,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:23,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989982285] [2020-10-28 14:24:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:23,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:23,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:23,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:24:23,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:23,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-28 14:24:23,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:23,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:23,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:24:23,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:23,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:24:23,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:24,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:24,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:24,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:24,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:24,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:24,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:24:24,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:24,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:24,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:24,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:24,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:24,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:24,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989982285] [2020-10-28 14:24:24,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:24,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:24:24,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631439275] [2020-10-28 14:24:24,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:24:24,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:24:24,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:24:24,022 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 23 states. [2020-10-28 14:24:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:25,246 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-28 14:24:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:24:25,247 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-28 14:24:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:25,248 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:24:25,248 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:24:25,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:24:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:24:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 14:24:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 14:24:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-28 14:24:25,263 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-28 14:24:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:25,263 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-28 14:24:25,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:24:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-28 14:24:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:24:25,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:25,264 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:25,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:24:25,264 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:25,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1945542780, now seen corresponding path program 20 times [2020-10-28 14:24:25,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:25,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626398428] [2020-10-28 14:24:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:25,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:25,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:25,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:24:25,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:25,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-28 14:24:25,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:25,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:25,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:24:25,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:25,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:24:25,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:25,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:25,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:25,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:25,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:25,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:25,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:24:25,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:25,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:25,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:25,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626398428] [2020-10-28 14:24:25,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:25,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:24:25,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115876812] [2020-10-28 14:24:25,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:24:25,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:24:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:24:25,987 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2020-10-28 14:24:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:27,270 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-28 14:24:27,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:24:27,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-28 14:24:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:27,271 INFO L225 Difference]: With dead ends: 44 [2020-10-28 14:24:27,271 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 14:24:27,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:24:27,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 14:24:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 14:24:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:24:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-28 14:24:27,279 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-10-28 14:24:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:27,279 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-28 14:24:27,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:24:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-28 14:24:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:24:27,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:27,280 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:27,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:24:27,281 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1009829278, now seen corresponding path program 21 times [2020-10-28 14:24:27,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:27,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925149879] [2020-10-28 14:24:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:27,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:27,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:27,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:24:27,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:27,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-28 14:24:27,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:27,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:27,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:24:27,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:27,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:24:27,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:28,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:28,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:28,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:28,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:28,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:28,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:24:28,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:28,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:28,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:28,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:28,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:28,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:28,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925149879] [2020-10-28 14:24:28,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:28,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:24:28,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46040095] [2020-10-28 14:24:28,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:24:28,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:28,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:24:28,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:24:28,063 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 25 states. [2020-10-28 14:24:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:29,468 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-28 14:24:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:24:29,468 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-28 14:24:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:29,469 INFO L225 Difference]: With dead ends: 45 [2020-10-28 14:24:29,469 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:24:29,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:24:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:24:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 14:24:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:24:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-28 14:24:29,477 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-28 14:24:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:29,477 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-28 14:24:29,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:24:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-28 14:24:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:24:29,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:29,478 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:29,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:24:29,478 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1862917436, now seen corresponding path program 22 times [2020-10-28 14:24:29,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:29,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076708859] [2020-10-28 14:24:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:29,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:29,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:29,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:24:29,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:29,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-28 14:24:29,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:29,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:29,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:24:29,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:29,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:24:29,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:30,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:30,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:30,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:30,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:30,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:24:30,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:30,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:30,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:30,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076708859] [2020-10-28 14:24:30,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:30,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:24:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218236272] [2020-10-28 14:24:30,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:24:30,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:30,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:24:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:24:30,310 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 26 states. [2020-10-28 14:24:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:31,812 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-28 14:24:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:24:31,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 35 [2020-10-28 14:24:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:31,814 INFO L225 Difference]: With dead ends: 46 [2020-10-28 14:24:31,814 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 14:24:31,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:24:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 14:24:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 14:24:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:24:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-28 14:24:31,826 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-28 14:24:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:31,826 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-28 14:24:31,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:24:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-28 14:24:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:24:31,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:31,827 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:31,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:24:31,828 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:31,828 INFO L82 PathProgramCache]: Analyzing trace with hash -723752354, now seen corresponding path program 23 times [2020-10-28 14:24:31,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:31,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952448575] [2020-10-28 14:24:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:31,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:32,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:32,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:24:32,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:32,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-28 14:24:32,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:32,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:32,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:24:32,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:32,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:24:32,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:32,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:32,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:32,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:32,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:32,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:32,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:24:32,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:32,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:32,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:32,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952448575] [2020-10-28 14:24:32,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:32,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:24:32,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032647038] [2020-10-28 14:24:32,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:24:32,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:32,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:24:32,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:24:32,671 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 27 states. [2020-10-28 14:24:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:34,088 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-28 14:24:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:24:34,088 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2020-10-28 14:24:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:34,089 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:24:34,089 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:24:34,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:24:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:24:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 14:24:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:24:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-28 14:24:34,096 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-28 14:24:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:34,097 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-28 14:24:34,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:24:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-28 14:24:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:24:34,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:34,098 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:34,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:24:34,098 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:34,098 INFO L82 PathProgramCache]: Analyzing trace with hash 230626820, now seen corresponding path program 24 times [2020-10-28 14:24:34,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:34,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715552510] [2020-10-28 14:24:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:34,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:34,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:34,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:24:34,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:34,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-28 14:24:34,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:34,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:34,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:24:34,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:34,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:24:34,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:35,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:35,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:35,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:35,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:35,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:35,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:24:35,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:35,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:35,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:35,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:35,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:35,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:35,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715552510] [2020-10-28 14:24:35,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:35,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:24:35,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451525353] [2020-10-28 14:24:35,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:24:35,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:24:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:24:35,087 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 28 states. [2020-10-28 14:24:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:36,698 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-28 14:24:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:24:36,699 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2020-10-28 14:24:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:36,700 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:24:36,700 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 14:24:36,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:24:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 14:24:36,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 14:24:36,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:24:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-28 14:24:36,707 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-10-28 14:24:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:36,707 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-28 14:24:36,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:24:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-28 14:24:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:24:36,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:36,708 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:36,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:24:36,708 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:36,709 INFO L82 PathProgramCache]: Analyzing trace with hash -248389858, now seen corresponding path program 25 times [2020-10-28 14:24:36,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:36,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385347719] [2020-10-28 14:24:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:36,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:37,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:37,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:24:37,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:37,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-28 14:24:37,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:37,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:37,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:24:37,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:37,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:24:37,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:37,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:37,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:37,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:37,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:37,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:37,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:24:37,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:37,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:37,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:37,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385347719] [2020-10-28 14:24:37,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:37,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:24:37,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396459939] [2020-10-28 14:24:37,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:24:37,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:37,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:24:37,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:24:37,750 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 29 states. [2020-10-28 14:24:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:39,514 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-28 14:24:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:24:39,515 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2020-10-28 14:24:39,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:39,516 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:24:39,516 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:24:39,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:24:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:24:39,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 14:24:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:24:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-28 14:24:39,523 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-28 14:24:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:39,524 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-28 14:24:39,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:24:39,524 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-28 14:24:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:24:39,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:39,525 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:39,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:24:39,525 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2081962308, now seen corresponding path program 26 times [2020-10-28 14:24:39,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:39,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453278150] [2020-10-28 14:24:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:39,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:39,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:39,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:24:39,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:39,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-28 14:24:39,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:39,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:39,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:24:39,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:39,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:24:39,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:40,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:40,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:40,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:40,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:40,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:40,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:24:40,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:40,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:40,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:40,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:40,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:40,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:40,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453278150] [2020-10-28 14:24:40,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:40,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:24:40,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750390824] [2020-10-28 14:24:40,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:24:40,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:40,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:24:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:24:40,556 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 30 states. [2020-10-28 14:24:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:42,301 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-28 14:24:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:24:42,302 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 39 [2020-10-28 14:24:42,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:42,302 INFO L225 Difference]: With dead ends: 50 [2020-10-28 14:24:42,302 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:24:42,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:24:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:24:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 14:24:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:24:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-28 14:24:42,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-28 14:24:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:42,311 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-28 14:24:42,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:24:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-28 14:24:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:24:42,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:42,312 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:42,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:24:42,312 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:42,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1308435422, now seen corresponding path program 27 times [2020-10-28 14:24:42,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:42,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767865977] [2020-10-28 14:24:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:42,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:42,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:42,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:24:42,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:42,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-28 14:24:42,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:42,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:42,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:24:42,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:42,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:24:42,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:43,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:43,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:43,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:43,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:43,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:43,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:24:43,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:43,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:43,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:43,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767865977] [2020-10-28 14:24:43,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:43,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:24:43,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068268455] [2020-10-28 14:24:43,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:24:43,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:43,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:24:43,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:24:43,452 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 31 states. [2020-10-28 14:24:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:45,464 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-28 14:24:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:24:45,464 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 40 [2020-10-28 14:24:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:45,465 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:24:45,465 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:24:45,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 14:24:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:24:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 14:24:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:24:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-28 14:24:45,473 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-28 14:24:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:45,473 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-28 14:24:45,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:24:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-28 14:24:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:24:45,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:45,474 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:45,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:24:45,474 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1196061564, now seen corresponding path program 28 times [2020-10-28 14:24:45,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:45,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962253770] [2020-10-28 14:24:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:45,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:45,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:45,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:24:45,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:45,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-28 14:24:45,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:45,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:45,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:24:45,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:45,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:24:45,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:46,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:46,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:46,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:46,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:46,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:46,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:24:46,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:46,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:46,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:46,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:46,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:46,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:46,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962253770] [2020-10-28 14:24:46,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:46,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 14:24:46,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147727333] [2020-10-28 14:24:46,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 14:24:46,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:46,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 14:24:46,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:24:46,738 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 32 states. [2020-10-28 14:24:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:48,771 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-28 14:24:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:24:48,771 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 41 [2020-10-28 14:24:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:48,772 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:24:48,772 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:24:48,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 14:24:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:24:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 14:24:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:24:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-28 14:24:48,782 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-10-28 14:24:48,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:48,782 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-28 14:24:48,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 14:24:48,782 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-28 14:24:48,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:24:48,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:48,783 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:48,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:24:48,783 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:48,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1526056802, now seen corresponding path program 29 times [2020-10-28 14:24:48,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:48,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300052846] [2020-10-28 14:24:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:48,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:49,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:49,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:24:49,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:49,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-28 14:24:49,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:49,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:49,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:24:49,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:49,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:24:49,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:49,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:49,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:49,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:49,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:49,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:49,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:24:49,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:49,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:49,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:49,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:49,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:49,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:24:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:50,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300052846] [2020-10-28 14:24:50,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:50,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:24:50,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416035206] [2020-10-28 14:24:50,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:24:50,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:50,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:24:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:24:50,015 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 33 states. [2020-10-28 14:24:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:52,314 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-28 14:24:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:24:52,315 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-10-28 14:24:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:52,316 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:24:52,316 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:24:52,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 14:24:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:24:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 14:24:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:24:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-28 14:24:52,324 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-28 14:24:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:52,324 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-28 14:24:52,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 14:24:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-28 14:24:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:24:52,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:52,325 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:52,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:24:52,325 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:52,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:52,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1128992708, now seen corresponding path program 30 times [2020-10-28 14:24:52,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:52,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478937755] [2020-10-28 14:24:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:52,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:52,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:52,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:24:52,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:52,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-28 14:24:52,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:52,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 14:24:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:24:52,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:53,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:53,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:53,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:53,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:53,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:53,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:24:53,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:53,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:53,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:53,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:53,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478937755] [2020-10-28 14:24:53,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:53,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 14:24:53,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207882644] [2020-10-28 14:24:53,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 14:24:53,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:53,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 14:24:53,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:24:53,562 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 34 states. [2020-10-28 14:24:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:55,713 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-28 14:24:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:24:55,713 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 43 [2020-10-28 14:24:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:55,714 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:24:55,714 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:24:55,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 14:24:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:24:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-28 14:24:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:24:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-28 14:24:55,721 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-10-28 14:24:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:55,721 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-28 14:24:55,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 14:24:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-28 14:24:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:24:55,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:55,722 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:55,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:24:55,722 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1831148894, now seen corresponding path program 31 times [2020-10-28 14:24:55,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:55,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533328077] [2020-10-28 14:24:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:55,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:56,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:56,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:24:56,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:56,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-28 14:24:56,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:56,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:56,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:24:56,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:24:56,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:24:56,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:24:57,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:24:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:57,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:24:57,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:24:57,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:24:57,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:24:57,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:24:57,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:24:57,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:24:57,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:24:57,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:24:57,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:24:57,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:24:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:24:57,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533328077] [2020-10-28 14:24:57,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:24:57,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 14:24:57,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356688379] [2020-10-28 14:24:57,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 14:24:57,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:24:57,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 14:24:57,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:24:57,058 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 35 states. [2020-10-28 14:24:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:24:59,510 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-28 14:24:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:24:59,511 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-10-28 14:24:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:24:59,512 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:24:59,512 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:24:59,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 14:24:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:24:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-28 14:24:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:24:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-28 14:24:59,519 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-28 14:24:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:24:59,519 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-28 14:24:59,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 14:24:59,519 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-28 14:24:59,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:24:59,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:24:59,520 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:24:59,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:24:59,520 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:24:59,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:24:59,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2123154180, now seen corresponding path program 32 times [2020-10-28 14:24:59,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:24:59,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321691352] [2020-10-28 14:24:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:24:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:24:59,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:00,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:00,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:25:00,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:00,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-28 14:25:00,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:00,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 14:25:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:25:00,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:00,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:00,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:00,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:00,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:00,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:00,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:25:00,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:00,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:00,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:00,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:00,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:00,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:00,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321691352] [2020-10-28 14:25:00,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:00,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 14:25:00,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855390355] [2020-10-28 14:25:00,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 14:25:00,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:00,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 14:25:00,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:25:00,921 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 36 states. [2020-10-28 14:25:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:03,444 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-28 14:25:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 14:25:03,445 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 45 [2020-10-28 14:25:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:03,446 INFO L225 Difference]: With dead ends: 56 [2020-10-28 14:25:03,446 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 14:25:03,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 14:25:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 14:25:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 14:25:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:25:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-28 14:25:03,451 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-10-28 14:25:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:03,451 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-28 14:25:03,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 14:25:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-28 14:25:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:25:03,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:03,452 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:03,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:25:03,452 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:03,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:03,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1709583842, now seen corresponding path program 33 times [2020-10-28 14:25:03,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:03,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915587116] [2020-10-28 14:25:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:03,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:03,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:03,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:25:03,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:03,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-28 14:25:03,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:03,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:03,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 14:25:03,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:03,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:25:03,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:04,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:04,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:04,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:04,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:04,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:04,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:25:04,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:04,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:04,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:04,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:04,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:04,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:04,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915587116] [2020-10-28 14:25:04,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:04,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 14:25:04,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610179071] [2020-10-28 14:25:04,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 14:25:04,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:04,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 14:25:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:25:04,912 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 37 states. [2020-10-28 14:25:07,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:07,541 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-28 14:25:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 14:25:07,545 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2020-10-28 14:25:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:07,545 INFO L225 Difference]: With dead ends: 57 [2020-10-28 14:25:07,545 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:25:07,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 14:25:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:25:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 14:25:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:25:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-28 14:25:07,551 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-28 14:25:07,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:07,551 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-28 14:25:07,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 14:25:07,551 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-28 14:25:07,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:25:07,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:07,552 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:07,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:25:07,552 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:07,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:07,552 INFO L82 PathProgramCache]: Analyzing trace with hash -265378236, now seen corresponding path program 34 times [2020-10-28 14:25:07,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:07,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907899729] [2020-10-28 14:25:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:07,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:08,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:08,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:25:08,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:08,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-28 14:25:08,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:08,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:08,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 14:25:08,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:08,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:25:08,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:09,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:09,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:09,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:09,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:09,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:09,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:25:09,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:09,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:09,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:09,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907899729] [2020-10-28 14:25:09,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:09,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 14:25:09,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443831650] [2020-10-28 14:25:09,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 14:25:09,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:09,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 14:25:09,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:25:09,049 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 38 states. [2020-10-28 14:25:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:11,753 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-28 14:25:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 14:25:11,754 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 47 [2020-10-28 14:25:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:11,755 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:25:11,755 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:25:11,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 14:25:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:25:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-28 14:25:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:25:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-28 14:25:11,762 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-28 14:25:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:11,763 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-28 14:25:11,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 14:25:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-28 14:25:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:25:11,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:11,764 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:11,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:25:11,764 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:11,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1555322590, now seen corresponding path program 35 times [2020-10-28 14:25:11,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:11,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767425171] [2020-10-28 14:25:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:11,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:12,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:12,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:25:12,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:12,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-28 14:25:12,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:12,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 14:25:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 14:25:12,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:13,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:13,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:13,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:13,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:13,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:13,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:25:13,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:13,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:13,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:13,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767425171] [2020-10-28 14:25:13,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:13,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 14:25:13,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499377264] [2020-10-28 14:25:13,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 14:25:13,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:13,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 14:25:13,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:25:13,317 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 39 states. [2020-10-28 14:25:16,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:16,075 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-28 14:25:16,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:25:16,077 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 48 [2020-10-28 14:25:16,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:16,078 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:25:16,078 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:25:16,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 14:25:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:25:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 14:25:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 14:25:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-28 14:25:16,085 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-28 14:25:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:16,085 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-28 14:25:16,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 14:25:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-28 14:25:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:25:16,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:16,086 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:16,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:25:16,086 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:16,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2132493948, now seen corresponding path program 36 times [2020-10-28 14:25:16,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:16,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57661211] [2020-10-28 14:25:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:16,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:16,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:16,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:25:16,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:16,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-28 14:25:16,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:16,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:16,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 14:25:16,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:25:16,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:17,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:17,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:17,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:17,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:17,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:17,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:25:17,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:17,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:17,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:17,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:17,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:17,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:17,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57661211] [2020-10-28 14:25:17,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:17,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 14:25:17,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118942263] [2020-10-28 14:25:17,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 14:25:17,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:17,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 14:25:17,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:25:17,755 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 40 states. [2020-10-28 14:25:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:20,606 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-28 14:25:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 14:25:20,607 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2020-10-28 14:25:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:20,608 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:25:20,608 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:25:20,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 14:25:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:25:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 14:25:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:25:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-28 14:25:20,613 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-28 14:25:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:20,614 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-28 14:25:20,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 14:25:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-28 14:25:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:25:20,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:20,615 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:20,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:25:20,615 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:20,615 INFO L82 PathProgramCache]: Analyzing trace with hash -490689634, now seen corresponding path program 37 times [2020-10-28 14:25:20,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:20,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228217632] [2020-10-28 14:25:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:20,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:21,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:21,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:25:21,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:21,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-28 14:25:21,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:21,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:21,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 14:25:21,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:21,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:25:21,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:22,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:22,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:22,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:22,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:22,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:22,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:25:22,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:22,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:22,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:22,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228217632] [2020-10-28 14:25:22,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:22,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 14:25:22,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658573950] [2020-10-28 14:25:22,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 14:25:22,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:22,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 14:25:22,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:25:22,366 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 41 states. [2020-10-28 14:25:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:25,306 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-28 14:25:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 14:25:25,307 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 50 [2020-10-28 14:25:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:25,308 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:25:25,308 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 14:25:25,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 14:25:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 14:25:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 14:25:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:25:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-28 14:25:25,317 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-28 14:25:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:25,317 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-28 14:25:25,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 14:25:25,317 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-28 14:25:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:25:25,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:25,318 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:25,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:25:25,318 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:25,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1134363452, now seen corresponding path program 38 times [2020-10-28 14:25:25,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:25,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941228945] [2020-10-28 14:25:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:25,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:25,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:25,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:25:25,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-28 14:25:25,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:25,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 14:25:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 14:25:25,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:27,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:27,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:27,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:27,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:27,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:27,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:25:27,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:27,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:27,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:27,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:27,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:27,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:27,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941228945] [2020-10-28 14:25:27,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:27,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 14:25:27,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591917545] [2020-10-28 14:25:27,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 14:25:27,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:27,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 14:25:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:25:27,186 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 42 states. [2020-10-28 14:25:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:30,344 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-28 14:25:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 14:25:30,344 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 51 [2020-10-28 14:25:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:30,345 INFO L225 Difference]: With dead ends: 62 [2020-10-28 14:25:30,345 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:25:30,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-28 14:25:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:25:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 14:25:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:25:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-28 14:25:30,353 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2020-10-28 14:25:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:30,353 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-28 14:25:30,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 14:25:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-28 14:25:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:25:30,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:30,354 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:30,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:25:30,354 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:30,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:30,355 INFO L82 PathProgramCache]: Analyzing trace with hash 386584670, now seen corresponding path program 39 times [2020-10-28 14:25:30,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:30,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675632431] [2020-10-28 14:25:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:30,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:30,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:30,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:25:30,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-28 14:25:30,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:30,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 14:25:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:25:30,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:32,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:32,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:32,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:32,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:32,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:32,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:25:32,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:32,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:32,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:32,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675632431] [2020-10-28 14:25:32,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:32,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 14:25:32,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225432374] [2020-10-28 14:25:32,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 14:25:32,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:32,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 14:25:32,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:25:32,181 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 43 states. [2020-10-28 14:25:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:35,503 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-28 14:25:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 14:25:35,503 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 52 [2020-10-28 14:25:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:35,504 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:25:35,504 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:25:35,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 14:25:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:25:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 14:25:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:25:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-28 14:25:35,511 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-28 14:25:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:35,511 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-28 14:25:35,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 14:25:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-28 14:25:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 14:25:35,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:35,512 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:35,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:25:35,512 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:35,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:35,513 INFO L82 PathProgramCache]: Analyzing trace with hash 291336196, now seen corresponding path program 40 times [2020-10-28 14:25:35,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:35,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491713857] [2020-10-28 14:25:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:35,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:36,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:36,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:25:36,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:36,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-28 14:25:36,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:36,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:36,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 14:25:36,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:36,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:25:36,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:37,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:37,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:37,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:37,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:37,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:37,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:25:37,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:37,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:37,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:37,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:37,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:37,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:37,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491713857] [2020-10-28 14:25:37,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:37,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 14:25:37,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204066143] [2020-10-28 14:25:37,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 14:25:37,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:37,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 14:25:37,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:25:37,423 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 44 states. [2020-10-28 14:25:40,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:40,719 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-28 14:25:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 14:25:40,720 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2020-10-28 14:25:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:40,721 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:25:40,721 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:25:40,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-28 14:25:40,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:25:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 14:25:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 14:25:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-28 14:25:40,729 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2020-10-28 14:25:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:40,729 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-28 14:25:40,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 14:25:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-28 14:25:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:25:40,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:40,730 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:40,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:25:40,730 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:40,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:40,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1633600798, now seen corresponding path program 41 times [2020-10-28 14:25:40,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:40,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555160079] [2020-10-28 14:25:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:40,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:41,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:41,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:25:41,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:41,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-28 14:25:41,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:41,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:41,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 14:25:41,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:41,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:25:41,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:42,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:42,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:42,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:42,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:42,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:42,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:25:42,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:42,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:42,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:42,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:42,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:42,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:42,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555160079] [2020-10-28 14:25:42,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:42,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 14:25:42,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240284902] [2020-10-28 14:25:42,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 14:25:42,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:42,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 14:25:42,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:25:42,719 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 45 states. [2020-10-28 14:25:46,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:46,297 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-28 14:25:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 14:25:46,298 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 54 [2020-10-28 14:25:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:46,299 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:25:46,299 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 14:25:46,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-28 14:25:46,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 14:25:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 14:25:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:25:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-28 14:25:46,307 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-28 14:25:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:46,307 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-28 14:25:46,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 14:25:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-28 14:25:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 14:25:46,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:46,308 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:46,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:25:46,308 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash 294130500, now seen corresponding path program 42 times [2020-10-28 14:25:46,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:46,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240802593] [2020-10-28 14:25:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:46,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:46,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:46,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:25:46,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:46,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-28 14:25:46,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:46,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:46,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 14:25:46,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:46,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:25:46,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:48,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:48,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:48,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:48,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:48,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:25:48,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:48,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:48,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:48,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240802593] [2020-10-28 14:25:48,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:48,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 14:25:48,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263198940] [2020-10-28 14:25:48,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 14:25:48,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 14:25:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 14:25:48,413 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 46 states. [2020-10-28 14:25:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:51,986 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-28 14:25:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 14:25:51,987 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 55 [2020-10-28 14:25:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:51,988 INFO L225 Difference]: With dead ends: 66 [2020-10-28 14:25:51,988 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 14:25:51,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-28 14:25:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 14:25:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-28 14:25:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:25:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-28 14:25:51,997 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-10-28 14:25:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:51,997 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-28 14:25:51,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 14:25:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-28 14:25:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 14:25:51,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:51,998 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:51,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:25:51,998 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:51,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1720224222, now seen corresponding path program 43 times [2020-10-28 14:25:51,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:51,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850889575] [2020-10-28 14:25:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:52,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:52,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:52,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:25:52,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:52,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-28 14:25:52,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:52,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:52,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 14:25:52,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:52,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:25:52,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:54,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:25:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:54,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:54,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:54,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:25:54,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:54,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:25:54,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:54,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:25:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:25:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:25:54,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:25:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:25:54,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850889575] [2020-10-28 14:25:54,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:25:54,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 14:25:54,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88561292] [2020-10-28 14:25:54,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 14:25:54,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:25:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 14:25:54,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:25:54,165 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 47 states. [2020-10-28 14:25:57,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:25:57,832 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-28 14:25:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 14:25:57,833 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 56 [2020-10-28 14:25:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:25:57,834 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:25:57,834 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:25:57,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-28 14:25:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:25:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 14:25:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:25:57,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-28 14:25:57,840 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-28 14:25:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:25:57,840 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-28 14:25:57,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 14:25:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-28 14:25:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 14:25:57,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:25:57,841 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:25:57,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:25:57,841 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:25:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:25:57,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1315510652, now seen corresponding path program 44 times [2020-10-28 14:25:57,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:25:57,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455030287] [2020-10-28 14:25:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:25:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:25:57,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:25:58,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:25:58,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 14:25:58,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:25:58,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-28 14:25:58,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:25:58,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:25:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 14:25:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:25:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 14:25:58,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:00,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:00,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:00,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:00,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:00,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:00,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:26:00,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:00,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:00,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:00,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455030287] [2020-10-28 14:26:00,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:00,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 14:26:00,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936229534] [2020-10-28 14:26:00,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 14:26:00,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:00,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 14:26:00,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:26:00,215 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 48 states. [2020-10-28 14:26:04,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:04,025 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-28 14:26:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 14:26:04,026 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 57 [2020-10-28 14:26:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:04,027 INFO L225 Difference]: With dead ends: 68 [2020-10-28 14:26:04,027 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:26:04,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-28 14:26:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:26:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 14:26:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:26:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-28 14:26:04,035 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2020-10-28 14:26:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:04,035 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-28 14:26:04,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 14:26:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-28 14:26:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 14:26:04,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:04,036 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:04,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:26:04,036 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:04,037 INFO L82 PathProgramCache]: Analyzing trace with hash -934011234, now seen corresponding path program 45 times [2020-10-28 14:26:04,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:04,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488077778] [2020-10-28 14:26:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:04,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:04,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:04,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 14:26:04,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:04,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-28 14:26:04,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:04,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:04,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 14:26:04,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:04,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 14:26:04,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:06,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:06,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:06,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:06,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:06,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:06,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:26:06,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:06,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:06,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:06,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:06,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:06,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:06,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488077778] [2020-10-28 14:26:06,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:06,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 14:26:06,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040957074] [2020-10-28 14:26:06,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 14:26:06,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:06,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 14:26:06,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:26:06,421 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 49 states. [2020-10-28 14:26:10,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:10,307 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-28 14:26:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 14:26:10,308 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 58 [2020-10-28 14:26:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:10,309 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:26:10,309 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 14:26:10,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-28 14:26:10,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 14:26:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-28 14:26:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:26:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-28 14:26:10,316 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-28 14:26:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:10,316 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-28 14:26:10,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 14:26:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-28 14:26:10,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:26:10,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:10,317 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:10,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:26:10,318 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:10,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1992431164, now seen corresponding path program 46 times [2020-10-28 14:26:10,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:10,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544340625] [2020-10-28 14:26:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:10,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:11,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:11,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 14:26:11,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:11,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-28 14:26:11,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:11,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 14:26:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:26:11,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:12,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:12,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:12,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:12,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:12,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:12,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:26:12,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:12,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:12,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:12,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:12,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:12,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:12,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544340625] [2020-10-28 14:26:12,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:12,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 14:26:12,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088925909] [2020-10-28 14:26:12,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 14:26:12,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:12,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 14:26:12,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 14:26:12,804 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 50 states. [2020-10-28 14:26:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:16,894 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-28 14:26:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 14:26:16,895 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 59 [2020-10-28 14:26:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:16,896 INFO L225 Difference]: With dead ends: 70 [2020-10-28 14:26:16,896 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 14:26:16,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-28 14:26:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 14:26:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-28 14:26:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:26:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-28 14:26:16,905 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2020-10-28 14:26:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:16,905 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-28 14:26:16,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 14:26:16,905 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-28 14:26:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:26:16,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:16,906 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:16,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:26:16,906 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:16,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:16,907 INFO L82 PathProgramCache]: Analyzing trace with hash -443710626, now seen corresponding path program 47 times [2020-10-28 14:26:16,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:16,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654310419] [2020-10-28 14:26:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:16,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:17,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:17,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 14:26:17,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:17,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-28 14:26:17,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:17,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-28 14:26:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 14:26:17,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:19,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:19,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:19,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:19,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:19,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:19,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:26:19,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:19,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:19,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:19,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:19,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:19,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:19,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654310419] [2020-10-28 14:26:19,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:19,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-28 14:26:19,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428019634] [2020-10-28 14:26:19,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-28 14:26:19,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-28 14:26:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:26:19,501 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 51 states. [2020-10-28 14:26:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:23,768 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-28 14:26:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 14:26:23,769 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 60 [2020-10-28 14:26:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:23,770 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:26:23,770 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 14:26:23,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-28 14:26:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 14:26:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-28 14:26:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 14:26:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-28 14:26:23,779 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-28 14:26:23,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:23,779 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-28 14:26:23,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-28 14:26:23,779 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-28 14:26:23,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 14:26:23,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:23,780 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:23,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:26:23,780 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 321985796, now seen corresponding path program 48 times [2020-10-28 14:26:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:23,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660715786] [2020-10-28 14:26:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:23,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:24,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:24,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:26:24,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:24,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-28 14:26:24,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:24,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:24,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-28 14:26:24,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:24,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:26:24,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:26,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:26,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:26,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:26,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:26,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:26,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:26:26,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:26,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:26,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:26,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:26,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:26,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:26,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660715786] [2020-10-28 14:26:26,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:26,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-28 14:26:26,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904195958] [2020-10-28 14:26:26,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-28 14:26:26,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-28 14:26:26,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 14:26:26,484 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 52 states. [2020-10-28 14:26:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:31,039 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-28 14:26:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-28 14:26:31,040 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 61 [2020-10-28 14:26:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:31,041 INFO L225 Difference]: With dead ends: 72 [2020-10-28 14:26:31,041 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 14:26:31,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-28 14:26:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 14:26:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-28 14:26:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 14:26:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-28 14:26:31,048 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2020-10-28 14:26:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:31,048 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-28 14:26:31,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-28 14:26:31,048 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-28 14:26:31,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:26:31,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:31,049 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:31,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:26:31,049 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:31,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:31,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1711228898, now seen corresponding path program 49 times [2020-10-28 14:26:31,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:31,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976698879] [2020-10-28 14:26:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:31,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:31,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:31,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:26:31,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:31,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-28 14:26:31,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:31,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:31,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-28 14:26:31,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:31,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 14:26:31,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:33,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:33,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:33,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:33,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:33,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:33,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:26:33,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:33,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:33,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:33,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:33,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:33,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:33,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976698879] [2020-10-28 14:26:33,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:33,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-28 14:26:33,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730019933] [2020-10-28 14:26:33,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-28 14:26:33,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:33,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-28 14:26:33,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:26:33,763 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 53 states. [2020-10-28 14:26:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:38,499 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-28 14:26:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 14:26:38,500 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 62 [2020-10-28 14:26:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:38,501 INFO L225 Difference]: With dead ends: 73 [2020-10-28 14:26:38,501 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 14:26:38,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-28 14:26:38,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 14:26:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-28 14:26:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 14:26:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-28 14:26:38,510 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-10-28 14:26:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:38,510 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-28 14:26:38,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-28 14:26:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-28 14:26:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 14:26:38,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:38,511 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:38,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:26:38,511 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:38,511 INFO L82 PathProgramCache]: Analyzing trace with hash -316374972, now seen corresponding path program 50 times [2020-10-28 14:26:38,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:38,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007490853] [2020-10-28 14:26:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:38,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:39,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:39,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 14:26:39,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:39,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-28 14:26:39,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:39,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:39,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-28 14:26:39,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:39,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 14:26:39,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:41,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:41,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:41,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:41,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:41,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:26:41,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:41,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:41,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007490853] [2020-10-28 14:26:41,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:41,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-28 14:26:41,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803640329] [2020-10-28 14:26:41,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-28 14:26:41,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:41,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-28 14:26:41,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 14:26:41,557 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 54 states. [2020-10-28 14:26:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:46,521 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-28 14:26:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 14:26:46,522 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 63 [2020-10-28 14:26:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:46,523 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:26:46,523 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 14:26:46,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-28 14:26:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 14:26:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-28 14:26:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 14:26:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-28 14:26:46,530 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2020-10-28 14:26:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:46,531 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-28 14:26:46,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-28 14:26:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-28 14:26:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 14:26:46,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:46,532 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:46,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:26:46,532 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:46,532 INFO L82 PathProgramCache]: Analyzing trace with hash -25576226, now seen corresponding path program 51 times [2020-10-28 14:26:46,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:46,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248582841] [2020-10-28 14:26:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:46,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:47,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:47,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:26:47,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:47,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-28 14:26:47,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:47,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:47,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-28 14:26:47,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:47,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 14:26:47,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:49,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:49,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:49,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:49,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:49,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:49,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:26:49,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:49,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:49,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:49,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248582841] [2020-10-28 14:26:49,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:49,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-28 14:26:49,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800042338] [2020-10-28 14:26:49,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-28 14:26:49,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:49,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-28 14:26:49,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:26:49,492 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 55 states. [2020-10-28 14:26:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:26:54,358 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-28 14:26:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 14:26:54,358 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 64 [2020-10-28 14:26:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:26:54,359 INFO L225 Difference]: With dead ends: 75 [2020-10-28 14:26:54,359 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:26:54,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-28 14:26:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:26:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 14:26:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:26:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-28 14:26:54,367 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-28 14:26:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:26:54,367 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-28 14:26:54,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-28 14:26:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-28 14:26:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 14:26:54,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:26:54,368 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:26:54,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:26:54,368 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:26:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:26:54,368 INFO L82 PathProgramCache]: Analyzing trace with hash 399250308, now seen corresponding path program 52 times [2020-10-28 14:26:54,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:26:54,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112946452] [2020-10-28 14:26:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:26:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:54,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:55,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:55,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:26:55,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:55,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-28 14:26:55,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:55,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:55,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-28 14:26:55,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:26:55,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 14:26:55,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:57,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:26:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:26:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:26:57,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:26:57,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:26:57,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:26:57,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:26:57,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:26:57,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:26:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:26:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:26:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:26:57,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:26:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:26:57,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112946452] [2020-10-28 14:26:57,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:26:57,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-28 14:26:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58955223] [2020-10-28 14:26:57,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-28 14:26:57,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:26:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-28 14:26:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 14:26:57,513 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 56 states. [2020-10-28 14:27:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:02,788 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-28 14:27:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-28 14:27:02,789 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 65 [2020-10-28 14:27:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:02,790 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:27:02,790 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 14:27:02,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-28 14:27:02,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 14:27:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-28 14:27:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:27:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-28 14:27:02,797 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2020-10-28 14:27:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:02,798 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-28 14:27:02,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-28 14:27:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-28 14:27:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:27:02,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:02,799 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:02,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:27:02,799 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:02,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:02,799 INFO L82 PathProgramCache]: Analyzing trace with hash 683970974, now seen corresponding path program 53 times [2020-10-28 14:27:02,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:02,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864301458] [2020-10-28 14:27:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:02,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:03,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:03,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:27:03,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:03,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 853 [2020-10-28 14:27:03,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:03,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 14:27:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 14:27:03,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:06,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:06,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:06,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:06,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:06,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:06,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:27:06,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:06,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:06,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:06,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:06,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:06,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:06,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864301458] [2020-10-28 14:27:06,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:06,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-28 14:27:06,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243809349] [2020-10-28 14:27:06,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-28 14:27:06,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:06,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-28 14:27:06,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:27:06,073 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 57 states. [2020-10-28 14:27:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:11,606 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-28 14:27:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 14:27:11,607 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 66 [2020-10-28 14:27:11,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:11,608 INFO L225 Difference]: With dead ends: 77 [2020-10-28 14:27:11,608 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 14:27:11,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-28 14:27:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 14:27:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 14:27:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 14:27:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-28 14:27:11,616 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-28 14:27:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:11,616 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-28 14:27:11,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-28 14:27:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-28 14:27:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 14:27:11,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:11,617 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:11,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:27:11,618 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:11,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:11,618 INFO L82 PathProgramCache]: Analyzing trace with hash 920377028, now seen corresponding path program 54 times [2020-10-28 14:27:11,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:11,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685426391] [2020-10-28 14:27:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:11,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:12,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:12,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 14:27:12,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:12,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-28 14:27:12,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:12,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:12,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-28 14:27:12,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:12,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 14:27:12,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:14,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:14,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:14,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:14,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:14,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:14,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:27:14,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:14,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:14,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:14,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:14,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:14,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:14,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685426391] [2020-10-28 14:27:14,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:14,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-28 14:27:14,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025033443] [2020-10-28 14:27:14,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-28 14:27:14,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-28 14:27:14,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 14:27:14,948 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 58 states. [2020-10-28 14:27:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:20,501 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-28 14:27:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-28 14:27:20,502 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 67 [2020-10-28 14:27:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:20,503 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:27:20,503 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 14:27:20,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-28 14:27:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 14:27:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-28 14:27:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 14:27:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-28 14:27:20,512 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2020-10-28 14:27:20,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:20,513 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-28 14:27:20,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-28 14:27:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-28 14:27:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 14:27:20,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:20,514 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:20,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:27:20,514 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:20,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:20,514 INFO L82 PathProgramCache]: Analyzing trace with hash -340969890, now seen corresponding path program 55 times [2020-10-28 14:27:20,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:20,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346122816] [2020-10-28 14:27:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:21,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:21,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:27:21,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:21,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-10-28 14:27:21,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:21,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-28 14:27:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 14:27:21,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:24,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:24,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:24,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:24,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:24,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:24,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:27:24,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:24,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:24,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:24,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:24,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:24,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:24,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346122816] [2020-10-28 14:27:24,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:24,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-28 14:27:24,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760930434] [2020-10-28 14:27:24,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-28 14:27:24,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:24,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-28 14:27:24,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 14:27:24,169 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 59 states. [2020-10-28 14:27:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:29,971 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-28 14:27:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-28 14:27:29,972 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 68 [2020-10-28 14:27:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:29,973 INFO L225 Difference]: With dead ends: 79 [2020-10-28 14:27:29,973 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 14:27:29,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-28 14:27:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 14:27:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-28 14:27:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:27:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-28 14:27:29,982 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-28 14:27:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:29,983 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-28 14:27:29,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-28 14:27:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-28 14:27:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 14:27:29,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:29,983 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:29,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 14:27:29,984 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:29,984 INFO L82 PathProgramCache]: Analyzing trace with hash -788018684, now seen corresponding path program 56 times [2020-10-28 14:27:29,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:29,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054571764] [2020-10-28 14:27:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:30,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:30,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:30,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:27:30,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:30,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-28 14:27:30,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:30,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:30,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-28 14:27:30,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:30,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 14:27:30,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:33,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:33,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:33,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:33,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:33,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:27:33,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:33,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:33,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:33,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054571764] [2020-10-28 14:27:33,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:33,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-28 14:27:33,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441848085] [2020-10-28 14:27:33,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-28 14:27:33,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-28 14:27:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 14:27:33,558 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 60 states. [2020-10-28 14:27:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:39,639 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-28 14:27:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 14:27:39,640 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 69 [2020-10-28 14:27:39,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:39,641 INFO L225 Difference]: With dead ends: 80 [2020-10-28 14:27:39,641 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:27:39,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2020-10-28 14:27:39,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:27:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-28 14:27:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:27:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-28 14:27:39,651 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2020-10-28 14:27:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:39,651 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-28 14:27:39,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-28 14:27:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-28 14:27:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 14:27:39,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:39,652 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:39,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 14:27:39,652 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1761629410, now seen corresponding path program 57 times [2020-10-28 14:27:39,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:39,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005557141] [2020-10-28 14:27:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:39,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:40,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:40,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 14:27:40,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:40,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-28 14:27:40,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:40,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:40,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-28 14:27:40,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:40,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 14:27:40,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:43,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:43,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:43,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:43,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:43,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:27:43,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:43,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:43,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:43,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:43,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:43,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:43,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005557141] [2020-10-28 14:27:43,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:43,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-28 14:27:43,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213932041] [2020-10-28 14:27:43,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-28 14:27:43,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:43,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-28 14:27:43,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 14:27:43,707 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 61 states. [2020-10-28 14:27:49,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:27:49,619 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-28 14:27:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-28 14:27:49,621 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 70 [2020-10-28 14:27:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:27:49,622 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:27:49,622 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 14:27:49,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2020-10-28 14:27:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 14:27:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 14:27:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:27:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-28 14:27:49,635 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-28 14:27:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:27:49,635 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-28 14:27:49,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-28 14:27:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-28 14:27:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 14:27:49,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:27:49,636 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:27:49,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 14:27:49,636 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:27:49,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:27:49,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1878790844, now seen corresponding path program 58 times [2020-10-28 14:27:49,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:27:49,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948266958] [2020-10-28 14:27:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:27:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:49,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:50,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:50,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 14:27:50,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-28 14:27:50,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:50,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-28 14:27:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:27:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 14:27:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:53,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:27:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:27:53,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:27:53,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:27:53,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:27:53,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:27:53,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:27:53,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:27:53,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:27:53,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:27:53,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:27:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:27:53,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:27:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:27:53,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948266958] [2020-10-28 14:27:53,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:27:53,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-28 14:27:53,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354107752] [2020-10-28 14:27:53,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-28 14:27:53,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:27:53,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-28 14:27:53,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 14:27:53,665 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 62 states.