/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/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:02:00,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:02:00,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:02:00,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:02:00,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:02:00,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:02:00,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:02:00,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:02:00,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:02:00,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:02:00,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:02:00,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:02:00,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:02:00,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:02:00,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:02:00,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:02:00,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:02:00,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:02:00,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:02:00,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:02:00,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:02:00,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:02:00,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:02:00,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:02:00,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:02:00,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:02:00,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:02:00,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:02:00,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:02:00,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:02:00,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:02:00,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:02:00,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:02:00,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:02:00,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:02:00,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:02:00,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:02:00,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:02:00,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:02:00,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:02:00,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:02:00,699 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 15:02:00,728 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:02:00,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:02:00,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:02:00,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:02:00,731 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:02:00,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:02:00,732 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:02:00,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:02:00,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:02:00,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:02:00,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:02:00,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:02:00,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:02:00,734 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:02:00,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:02:00,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:02:00,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:02:00,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:02:00,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:02:00,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:02:00,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:02:00,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:02:00,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:02:00,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:02:00,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:02:00,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:02:00,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:02:00,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:02:00,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:02:00,738 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:02:01,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:02:01,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:02:01,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:02:01,178 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:02:01,179 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:02:01,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-28 15:02:01,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43bf30d36/404eedbdfda44aa6a8e4e2fcd86bf043/FLAG61858e748 [2020-10-28 15:02:02,012 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:02:02,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-28 15:02:02,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43bf30d36/404eedbdfda44aa6a8e4e2fcd86bf043/FLAG61858e748 [2020-10-28 15:02:02,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43bf30d36/404eedbdfda44aa6a8e4e2fcd86bf043 [2020-10-28 15:02:02,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:02:02,322 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:02:02,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:02:02,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:02:02,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:02:02,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:02:02" (1/1) ... [2020-10-28 15:02:02,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50822c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02, skipping insertion in model container [2020-10-28 15:02:02,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:02:02" (1/1) ... [2020-10-28 15:02:02,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:02:02,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:02:02,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:02:02,540 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:02:02,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:02:02,573 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:02:02,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02 WrapperNode [2020-10-28 15:02:02,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:02:02,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:02:02,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:02:02,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:02:02,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02" (1/1) ... [2020-10-28 15:02:02,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02" (1/1) ... [2020-10-28 15:02:02,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02" (1/1) ... [2020-10-28 15:02:02,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02" (1/1) ... [2020-10-28 15:02:02,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02" (1/1) ... [2020-10-28 15:02:02,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02" (1/1) ... [2020-10-28 15:02:02,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02" (1/1) ... [2020-10-28 15:02:02,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:02:02,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:02:02,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:02:02,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:02:02,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02" (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 15:02:02,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:02:02,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:02:02,694 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:02:02,694 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:02:02,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:02:02,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:02:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:02:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:02:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:02:02,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:02:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:02:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:02:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:02:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:02:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:02:02,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:02:02,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:02:02,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:02:02,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:02:02,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:02:02,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:02:02,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:02:02,979 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:02:02,979 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:02:02,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:02:02 BoogieIcfgContainer [2020-10-28 15:02:02,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:02:02,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:02:02,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:02:02,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:02:02,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:02:02" (1/3) ... [2020-10-28 15:02:02,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@918db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:02:02, skipping insertion in model container [2020-10-28 15:02:02,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:02" (2/3) ... [2020-10-28 15:02:02,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@918db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:02:02, skipping insertion in model container [2020-10-28 15:02:02,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:02:02" (3/3) ... [2020-10-28 15:02:02,996 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-10-28 15:02:03,014 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:02:03,020 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:02:03,041 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:02:03,076 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:02:03,077 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:02:03,077 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:02:03,077 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:02:03,077 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:02:03,078 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:02:03,078 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:02:03,078 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:02:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-28 15:02:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:02:03,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:03,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:03,109 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:03,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2005588687, now seen corresponding path program 1 times [2020-10-28 15:02:03,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:03,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401193855] [2020-10-28 15:02:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:03,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:03,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:03,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:03,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:02:03,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:02:03,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-28 15:02:03,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:03,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:03,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:03,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:03,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:03,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:02:03,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:03,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:03,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:03,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:03,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:03,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:02:03,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:03,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:03,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:03,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:03,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:03,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:03,938 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 15:02:03,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401193855] [2020-10-28 15:02:03,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:02:03,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:02:03,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243808357] [2020-10-28 15:02:03,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:02:03,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:03,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:02:03,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:02:03,972 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-28 15:02:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:04,041 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-28 15:02:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:02:04,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-28 15:02:04,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:04,051 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:02:04,052 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 15:02:04,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:02:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 15:02:04,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 15:02:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:02:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 15:02:04,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-28 15:02:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:04,098 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 15:02:04,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:02:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 15:02:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:02:04,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:04,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:04,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:02:04,100 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:04,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1278695818, now seen corresponding path program 1 times [2020-10-28 15:02:04,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:04,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125602558] [2020-10-28 15:02:04,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:04,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:04,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:04,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:02:04,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:04,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 15:02:04,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:04,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:04,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:02:04,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:04,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:02:04,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:04,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:04,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:04,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:04,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:04,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:04,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:02:04,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:04,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:04,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:04,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:04,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:04,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:04,299 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 15:02:04,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125602558] [2020-10-28 15:02:04,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:02:04,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:02:04,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31780948] [2020-10-28 15:02:04,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:02:04,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:02:04,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:02:04,304 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-28 15:02:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:04,476 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-28 15:02:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:02:04,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-28 15:02:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:04,478 INFO L225 Difference]: With dead ends: 26 [2020-10-28 15:02:04,478 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:02:04,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:02:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:02:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:02:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:02:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-28 15:02:04,488 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-28 15:02:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:04,489 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-28 15:02:04,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:02:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-28 15:02:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:02:04,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:04,490 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:04,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:02:04,491 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:04,492 INFO L82 PathProgramCache]: Analyzing trace with hash -338650440, now seen corresponding path program 1 times [2020-10-28 15:02:04,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:04,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976044260] [2020-10-28 15:02:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:04,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:04,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:04,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:02:04,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:04,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-28 15:02:04,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:04,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:02:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:02:04,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:04,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:04,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:04,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:04,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:04,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:04,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:02:04,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:04,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:04,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:04,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:04,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:04,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:04,790 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 15:02:04,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976044260] [2020-10-28 15:02:04,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:04,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:02:04,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906373709] [2020-10-28 15:02:04,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:02:04,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:04,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:02:04,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:02:04,794 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-10-28 15:02:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:04,993 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-28 15:02:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:02:04,994 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-28 15:02:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:04,995 INFO L225 Difference]: With dead ends: 29 [2020-10-28 15:02:04,995 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 15:02:04,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:02:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 15:02:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 15:02:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:02:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-28 15:02:05,003 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-28 15:02:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:05,004 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-28 15:02:05,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:02:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-28 15:02:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:02:05,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:05,005 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:05,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:02:05,006 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1757895990, now seen corresponding path program 2 times [2020-10-28 15:02:05,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:05,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461575186] [2020-10-28 15:02:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:05,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:02:05,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:05,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 15:02:05,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:05,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:05,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:02:05,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:05,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:02:05,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:05,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:05,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:05,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:02:05,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:05,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:05,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:05,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461575186] [2020-10-28 15:02:05,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:05,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:02:05,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668429363] [2020-10-28 15:02:05,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:02:05,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:05,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:02:05,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:02:05,250 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-10-28 15:02:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:05,529 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-28 15:02:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:02:05,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-28 15:02:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:05,530 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:02:05,531 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:02:05,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:02:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 15:02:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:02:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-28 15:02:05,538 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2020-10-28 15:02:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:05,539 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-28 15:02:05,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:02:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-28 15:02:05,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:02:05,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:05,540 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:05,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:02:05,540 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:05,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1450953080, now seen corresponding path program 3 times [2020-10-28 15:02:05,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:05,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529219265] [2020-10-28 15:02:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:05,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:02:05,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:05,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-28 15:02:05,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:05,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:05,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:02:05,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:05,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:02:05,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:05,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:05,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:05,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:05,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:05,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:05,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:05,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:05,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:05,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:05,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529219265] [2020-10-28 15:02:05,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:05,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:02:05,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261347498] [2020-10-28 15:02:05,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:02:05,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:02:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:02:05,801 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 9 states. [2020-10-28 15:02:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:06,087 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-28 15:02:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:02:06,088 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-28 15:02:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:06,089 INFO L225 Difference]: With dead ends: 35 [2020-10-28 15:02:06,089 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 15:02:06,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:02:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 15:02:06,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 15:02:06,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:02:06,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-28 15:02:06,096 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2020-10-28 15:02:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:06,097 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-28 15:02:06,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:02:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-28 15:02:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:02:06,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:06,098 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:06,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:02:06,098 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:06,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:06,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1108476918, now seen corresponding path program 4 times [2020-10-28 15:02:06,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:06,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818964751] [2020-10-28 15:02:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:06,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:06,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:06,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:02:06,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:06,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-28 15:02:06,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:06,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:06,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:02:06,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:06,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:02:06,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:06,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:06,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:06,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:06,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:06,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:06,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:06,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:06,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:06,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:06,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:06,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:06,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:06,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818964751] [2020-10-28 15:02:06,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:06,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:02:06,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392913117] [2020-10-28 15:02:06,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:02:06,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:06,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:02:06,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:02:06,403 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 10 states. [2020-10-28 15:02:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:06,718 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-28 15:02:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:02:06,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-28 15:02:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:06,720 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:02:06,720 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:02:06,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:02:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:02:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 15:02:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:02:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-28 15:02:06,728 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 27 [2020-10-28 15:02:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:06,728 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-28 15:02:06,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:02:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-28 15:02:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:02:06,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:06,729 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:06,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:02:06,730 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:06,730 INFO L82 PathProgramCache]: Analyzing trace with hash -533141448, now seen corresponding path program 5 times [2020-10-28 15:02:06,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:06,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834688025] [2020-10-28 15:02:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:06,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:06,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:06,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:02:06,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-28 15:02:06,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:06,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:02:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:06,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:02:06,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:07,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:07,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:07,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:07,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:07,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:02:07,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:07,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:07,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:07,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:07,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:07,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:07,076 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 15:02:07,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834688025] [2020-10-28 15:02:07,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:07,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:02:07,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783396045] [2020-10-28 15:02:07,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:02:07,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:07,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:02:07,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:02:07,079 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 11 states. [2020-10-28 15:02:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:07,486 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-10-28 15:02:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:02:07,486 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 15:02:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:07,488 INFO L225 Difference]: With dead ends: 41 [2020-10-28 15:02:07,488 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 15:02:07,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:02:07,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 15:02:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 15:02:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:02:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-28 15:02:07,505 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 30 [2020-10-28 15:02:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:07,506 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-28 15:02:07,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:02:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-28 15:02:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:02:07,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:07,507 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:07,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:02:07,507 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:07,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:07,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1928633014, now seen corresponding path program 6 times [2020-10-28 15:02:07,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:07,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367734533] [2020-10-28 15:02:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:07,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:07,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:02:07,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:07,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-28 15:02:07,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:07,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:02:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:02:07,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:07,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:07,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:07,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:07,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:07,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:07,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:07,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:07,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:07,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:07,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367734533] [2020-10-28 15:02:07,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:07,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:02:07,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108499719] [2020-10-28 15:02:07,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:02:07,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:07,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:02:07,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:02:07,928 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 12 states. [2020-10-28 15:02:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:08,489 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-28 15:02:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:02:08,490 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-28 15:02:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:08,490 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:02:08,491 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 15:02:08,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:02:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 15:02:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 15:02:08,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:02:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-28 15:02:08,499 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 33 [2020-10-28 15:02:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:08,500 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-28 15:02:08,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:02:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-28 15:02:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:02:08,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:08,501 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:08,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:02:08,501 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:08,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:08,502 INFO L82 PathProgramCache]: Analyzing trace with hash 265549560, now seen corresponding path program 7 times [2020-10-28 15:02:08,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:08,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940560907] [2020-10-28 15:02:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:08,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:08,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:08,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:02:08,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:08,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-28 15:02:08,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:08,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:08,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:02:08,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:08,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:02:08,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:08,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:08,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:08,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:08,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:08,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:09,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:09,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:09,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:09,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:09,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:09,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:09,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:09,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940560907] [2020-10-28 15:02:09,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:09,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:02:09,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659323181] [2020-10-28 15:02:09,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:02:09,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:02:09,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:09,010 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 13 states. [2020-10-28 15:02:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:09,613 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-28 15:02:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:02:09,613 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-28 15:02:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:09,615 INFO L225 Difference]: With dead ends: 47 [2020-10-28 15:02:09,615 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 15:02:09,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:02:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 15:02:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 15:02:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:02:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-28 15:02:09,624 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 36 [2020-10-28 15:02:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:09,624 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-28 15:02:09,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:02:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-28 15:02:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:02:09,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:09,626 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:09,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:02:09,626 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:09,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2051333770, now seen corresponding path program 8 times [2020-10-28 15:02:09,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:09,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274221177] [2020-10-28 15:02:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:09,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:09,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:09,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:02:09,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:09,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-28 15:02:09,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:09,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:02:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 15:02:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:10,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:10,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:10,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:10,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:10,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:10,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:10,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:10,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:10,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:10,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:10,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:10,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:10,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274221177] [2020-10-28 15:02:10,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:10,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:02:10,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049128856] [2020-10-28 15:02:10,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:02:10,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:10,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:02:10,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:02:10,089 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 14 states. [2020-10-28 15:02:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:10,766 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-28 15:02:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:02:10,767 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-28 15:02:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:10,768 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:02:10,768 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 15:02:10,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:02:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 15:02:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 15:02:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 15:02:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-28 15:02:10,777 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2020-10-28 15:02:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:10,778 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-28 15:02:10,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:02:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-28 15:02:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:02:10,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:10,779 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:10,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:02:10,780 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:10,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:10,780 INFO L82 PathProgramCache]: Analyzing trace with hash 588838328, now seen corresponding path program 9 times [2020-10-28 15:02:10,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:10,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622206775] [2020-10-28 15:02:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:10,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:11,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:02:11,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:11,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-28 15:02:11,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:11,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:11,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:02:11,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:11,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:02:11,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:11,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:11,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:11,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:11,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:11,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:11,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:11,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:11,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:11,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:11,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:11,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:11,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622206775] [2020-10-28 15:02:11,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:11,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:02:11,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207308516] [2020-10-28 15:02:11,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:02:11,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:11,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:02:11,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:02:11,378 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 15 states. [2020-10-28 15:02:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:12,148 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-28 15:02:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:02:12,148 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-28 15:02:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:12,149 INFO L225 Difference]: With dead ends: 53 [2020-10-28 15:02:12,149 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 15:02:12,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:02:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 15:02:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-28 15:02:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:02:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-28 15:02:12,159 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 42 [2020-10-28 15:02:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:12,159 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-28 15:02:12,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:02:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-28 15:02:12,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 15:02:12,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:12,160 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:12,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:02:12,161 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash -464623670, now seen corresponding path program 10 times [2020-10-28 15:02:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:12,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756147920] [2020-10-28 15:02:12,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:12,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:12,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:02:12,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:12,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-28 15:02:12,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:12,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:12,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:02:12,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:12,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 15:02:12,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:12,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:12,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:12,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:12,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:12,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:12,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:12,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:12,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:12,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:12,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:12,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:12,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756147920] [2020-10-28 15:02:12,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:12,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:02:12,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338113735] [2020-10-28 15:02:12,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:02:12,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:02:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:02:12,823 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 16 states. [2020-10-28 15:02:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:13,635 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-28 15:02:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:02:13,636 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-28 15:02:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:13,637 INFO L225 Difference]: With dead ends: 56 [2020-10-28 15:02:13,637 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:02:13,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:02:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:02:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 15:02:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:02:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-28 15:02:13,646 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 45 [2020-10-28 15:02:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:13,647 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-28 15:02:13,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:02:13,647 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-28 15:02:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:02:13,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:13,648 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:13,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:02:13,648 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:13,649 INFO L82 PathProgramCache]: Analyzing trace with hash -824974216, now seen corresponding path program 11 times [2020-10-28 15:02:13,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:13,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637234623] [2020-10-28 15:02:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:13,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:14,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:14,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:02:14,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:14,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-28 15:02:14,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:14,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:02:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:02:14,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:14,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:14,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:14,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:14,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:14,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:14,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:14,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:14,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:14,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:14,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637234623] [2020-10-28 15:02:14,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:14,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:02:14,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964089354] [2020-10-28 15:02:14,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:02:14,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:14,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:02:14,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:02:14,315 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 17 states. [2020-10-28 15:02:15,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:15,349 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-28 15:02:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:02:15,350 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-28 15:02:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:15,351 INFO L225 Difference]: With dead ends: 59 [2020-10-28 15:02:15,351 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 15:02:15,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:02:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 15:02:15,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 15:02:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:02:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-10-28 15:02:15,362 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 48 [2020-10-28 15:02:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:15,362 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-10-28 15:02:15,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:02:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-10-28 15:02:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:02:15,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:15,364 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:15,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:02:15,364 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:15,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1390149898, now seen corresponding path program 12 times [2020-10-28 15:02:15,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:15,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125547041] [2020-10-28 15:02:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:15,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:15,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:02:15,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:15,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-28 15:02:15,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:15,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:15,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:02:15,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:15,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 15:02:15,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:16,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:16,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:16,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:16,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:16,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:02:16,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:16,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:16,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:16,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125547041] [2020-10-28 15:02:16,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:16,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:02:16,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061046753] [2020-10-28 15:02:16,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:02:16,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:02:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:02:16,139 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 18 states. [2020-10-28 15:02:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:17,215 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-28 15:02:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:02:17,216 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-28 15:02:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:17,217 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:02:17,217 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:02:17,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:02:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:02:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 15:02:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 15:02:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-10-28 15:02:17,228 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 51 [2020-10-28 15:02:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:17,229 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-10-28 15:02:17,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:02:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2020-10-28 15:02:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 15:02:17,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:17,230 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:17,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:02:17,230 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:17,231 INFO L82 PathProgramCache]: Analyzing trace with hash -19872968, now seen corresponding path program 13 times [2020-10-28 15:02:17,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:17,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837413020] [2020-10-28 15:02:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:17,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:17,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:17,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:02:17,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:17,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-28 15:02:17,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:17,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:17,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:02:17,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:17,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 15:02:17,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:18,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:18,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:18,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:18,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:18,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:18,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:18,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:18,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:18,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:18,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:18,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:18,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837413020] [2020-10-28 15:02:18,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:18,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:02:18,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577751620] [2020-10-28 15:02:18,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:02:18,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:18,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:02:18,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:02:18,066 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 19 states. [2020-10-28 15:02:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:19,180 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-10-28 15:02:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:02:19,180 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-28 15:02:19,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:19,181 INFO L225 Difference]: With dead ends: 65 [2020-10-28 15:02:19,181 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 15:02:19,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:02:19,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 15:02:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-28 15:02:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 15:02:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-28 15:02:19,192 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 54 [2020-10-28 15:02:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:19,192 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-28 15:02:19,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:02:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-28 15:02:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 15:02:19,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:19,193 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:19,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:02:19,194 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:19,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1230919094, now seen corresponding path program 14 times [2020-10-28 15:02:19,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:19,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705955308] [2020-10-28 15:02:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:19,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:19,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:19,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 15:02:19,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-28 15:02:19,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:19,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:02:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 15:02:19,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:20,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:20,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:20,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:20,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:20,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:20,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:20,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:20,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:20,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:20,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:20,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:20,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705955308] [2020-10-28 15:02:20,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:20,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:02:20,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990750949] [2020-10-28 15:02:20,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:02:20,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:20,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:02:20,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:02:20,127 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 20 states. [2020-10-28 15:02:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:21,465 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-10-28 15:02:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:02:21,468 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-28 15:02:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:21,468 INFO L225 Difference]: With dead ends: 68 [2020-10-28 15:02:21,469 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:02:21,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:02:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:02:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-28 15:02:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 15:02:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-10-28 15:02:21,479 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 57 [2020-10-28 15:02:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:21,479 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-10-28 15:02:21,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:02:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-10-28 15:02:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 15:02:21,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:21,481 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:21,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:02:21,481 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:21,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1780772360, now seen corresponding path program 15 times [2020-10-28 15:02:21,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:21,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182771229] [2020-10-28 15:02:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:21,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:22,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:22,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 15:02:22,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:22,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-28 15:02:22,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:22,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:02:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 15:02:22,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:22,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:22,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:22,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:22,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:22,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:22,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:22,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:22,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:22,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:22,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:22,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182771229] [2020-10-28 15:02:22,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:22,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:02:22,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422980604] [2020-10-28 15:02:22,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:02:22,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:22,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:02:22,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:02:22,400 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 21 states. [2020-10-28 15:02:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:23,848 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-10-28 15:02:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:02:23,848 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2020-10-28 15:02:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:23,849 INFO L225 Difference]: With dead ends: 71 [2020-10-28 15:02:23,849 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 15:02:23,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:02:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 15:02:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-28 15:02:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 15:02:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-10-28 15:02:23,873 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 60 [2020-10-28 15:02:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:23,874 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-10-28 15:02:23,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:02:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-10-28 15:02:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 15:02:23,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:23,875 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:23,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:02:23,875 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:23,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:23,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1454152822, now seen corresponding path program 16 times [2020-10-28 15:02:23,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:23,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360620063] [2020-10-28 15:02:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:23,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:24,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:24,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 15:02:24,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:24,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-28 15:02:24,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:24,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:24,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:02:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 15:02:24,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:24,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:24,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:24,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:24,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:24,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:24,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:02:24,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:24,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:24,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:24,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:24,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:24,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:24,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360620063] [2020-10-28 15:02:24,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:24,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:02:24,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227326882] [2020-10-28 15:02:24,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:02:24,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:24,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:02:24,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:02:24,967 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 22 states. [2020-10-28 15:02:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:26,360 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-10-28 15:02:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:02:26,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-28 15:02:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:26,362 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:02:26,362 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:02:26,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:02:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:02:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 15:02:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:02:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-10-28 15:02:26,372 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 63 [2020-10-28 15:02:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:26,372 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-10-28 15:02:26,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:02:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-10-28 15:02:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 15:02:26,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:26,373 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:26,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:02:26,374 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:26,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:26,374 INFO L82 PathProgramCache]: Analyzing trace with hash 767578296, now seen corresponding path program 17 times [2020-10-28 15:02:26,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:26,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295751977] [2020-10-28 15:02:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:26,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:27,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:27,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 15:02:27,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:27,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-28 15:02:27,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:27,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:27,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:02:27,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:27,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 15:02:27,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:27,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:27,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:27,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:27,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:27,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:27,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:02:27,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:27,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:27,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:27,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295751977] [2020-10-28 15:02:27,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:27,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:02:27,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010541665] [2020-10-28 15:02:27,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:02:27,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:27,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:02:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:02:27,501 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 23 states. [2020-10-28 15:02:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:29,215 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-10-28 15:02:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:02:29,216 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-10-28 15:02:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:29,217 INFO L225 Difference]: With dead ends: 77 [2020-10-28 15:02:29,217 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 15:02:29,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:02:29,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 15:02:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-28 15:02:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 15:02:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-10-28 15:02:29,228 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 66 [2020-10-28 15:02:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:29,228 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-10-28 15:02:29,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:02:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-10-28 15:02:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 15:02:29,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:29,229 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:29,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:02:29,230 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:29,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:29,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1381684022, now seen corresponding path program 18 times [2020-10-28 15:02:29,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:29,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199665069] [2020-10-28 15:02:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:29,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:29,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:29,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 15:02:29,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:29,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-28 15:02:29,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:29,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:29,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:02:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 15:02:29,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:30,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:30,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:30,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:30,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:30,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:30,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:30,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:30,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:30,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:30,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:30,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:30,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:30,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199665069] [2020-10-28 15:02:30,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:30,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:02:30,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437633299] [2020-10-28 15:02:30,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:02:30,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:02:30,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:02:30,397 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 24 states. [2020-10-28 15:02:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:32,365 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2020-10-28 15:02:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:02:32,365 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-28 15:02:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:32,366 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:02:32,366 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:02:32,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:02:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:02:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 15:02:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 15:02:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-28 15:02:32,376 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 69 [2020-10-28 15:02:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:32,376 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-28 15:02:32,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:02:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-28 15:02:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 15:02:32,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:32,377 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:32,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:02:32,377 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:32,378 INFO L82 PathProgramCache]: Analyzing trace with hash -682950792, now seen corresponding path program 19 times [2020-10-28 15:02:32,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:32,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180077057] [2020-10-28 15:02:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:32,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:33,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:33,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 15:02:33,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:33,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-28 15:02:33,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:33,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:33,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:02:33,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:33,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 15:02:33,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:33,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:33,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:33,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:33,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:33,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:33,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:02:33,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:33,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:33,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:33,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180077057] [2020-10-28 15:02:33,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:33,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:02:33,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808077867] [2020-10-28 15:02:33,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:02:33,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:33,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:02:33,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:02:33,588 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 25 states. [2020-10-28 15:02:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:35,739 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-10-28 15:02:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:02:35,740 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-10-28 15:02:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:35,741 INFO L225 Difference]: With dead ends: 83 [2020-10-28 15:02:35,741 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 15:02:35,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=137, Invalid=2025, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:02:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 15:02:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-28 15:02:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 15:02:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-10-28 15:02:35,752 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 72 [2020-10-28 15:02:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:35,753 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-10-28 15:02:35,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:02:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-10-28 15:02:35,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 15:02:35,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:35,754 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:35,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:02:35,754 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:35,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:35,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1867187722, now seen corresponding path program 20 times [2020-10-28 15:02:35,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:35,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917553807] [2020-10-28 15:02:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:35,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:36,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:36,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 15:02:36,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:36,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 821 [2020-10-28 15:02:36,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:36,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:02:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 15:02:36,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:37,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:37,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:37,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:37,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:37,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:37,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:37,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:37,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:37,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:37,176 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 15:02:37,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917553807] [2020-10-28 15:02:37,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:37,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:02:37,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127717807] [2020-10-28 15:02:37,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:02:37,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:37,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:02:37,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:02:37,180 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 26 states. [2020-10-28 15:02:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:39,445 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-10-28 15:02:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:02:39,447 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-10-28 15:02:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:39,449 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:02:39,449 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 15:02:39,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=2209, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:02:39,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 15:02:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-28 15:02:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 15:02:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2020-10-28 15:02:39,459 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 75 [2020-10-28 15:02:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:39,460 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2020-10-28 15:02:39,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:02:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2020-10-28 15:02:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 15:02:39,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:39,461 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:39,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:02:39,461 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:39,462 INFO L82 PathProgramCache]: Analyzing trace with hash -632840648, now seen corresponding path program 21 times [2020-10-28 15:02:39,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:39,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014826695] [2020-10-28 15:02:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:39,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:40,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:40,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 15:02:40,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:40,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 870 [2020-10-28 15:02:40,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:40,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:02:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 15:02:40,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:40,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:40,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:40,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:40,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:40,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:40,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:40,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:40,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:40,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:40,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:40,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:40,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:40,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014826695] [2020-10-28 15:02:40,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:40,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:02:40,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115046452] [2020-10-28 15:02:40,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:02:40,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:40,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:02:40,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:02:40,922 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 27 states. [2020-10-28 15:02:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:43,472 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2020-10-28 15:02:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:02:43,473 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2020-10-28 15:02:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:43,474 INFO L225 Difference]: With dead ends: 89 [2020-10-28 15:02:43,474 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 15:02:43,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=149, Invalid=2401, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:02:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 15:02:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-28 15:02:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 15:02:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2020-10-28 15:02:43,484 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 78 [2020-10-28 15:02:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:43,484 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2020-10-28 15:02:43,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:02:43,485 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2020-10-28 15:02:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 15:02:43,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:43,486 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:43,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:02:43,486 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash 49868618, now seen corresponding path program 22 times [2020-10-28 15:02:43,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:43,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134229533] [2020-10-28 15:02:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:43,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:44,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:44,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 15:02:44,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:44,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-28 15:02:44,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:44,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:44,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 15:02:44,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:44,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 15:02:44,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:45,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:45,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:45,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:45,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:45,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:45,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:45,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:45,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:45,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:45,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:45,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:45,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:45,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134229533] [2020-10-28 15:02:45,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:45,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 15:02:45,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932816423] [2020-10-28 15:02:45,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 15:02:45,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 15:02:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:02:45,241 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand 28 states. [2020-10-28 15:02:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:48,012 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2020-10-28 15:02:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:02:48,012 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-10-28 15:02:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:48,013 INFO L225 Difference]: With dead ends: 92 [2020-10-28 15:02:48,014 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 15:02:48,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=155, Invalid=2601, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:02:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 15:02:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-28 15:02:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 15:02:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2020-10-28 15:02:48,025 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 81 [2020-10-28 15:02:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:48,025 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2020-10-28 15:02:48,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 15:02:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2020-10-28 15:02:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 15:02:48,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:48,027 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:48,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:02:48,027 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:48,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1971465464, now seen corresponding path program 23 times [2020-10-28 15:02:48,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:48,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994975862] [2020-10-28 15:02:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:48,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:48,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:48,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 15:02:48,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:48,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 929 [2020-10-28 15:02:48,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:48,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:02:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 15:02:48,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:49,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:49,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:49,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:49,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:49,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:49,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 15:02:49,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:49,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:49,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:49,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:49,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994975862] [2020-10-28 15:02:49,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:49,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:02:49,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016344391] [2020-10-28 15:02:49,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:02:49,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:49,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:02:49,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:02:49,588 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand 29 states. [2020-10-28 15:02:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:52,593 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-28 15:02:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:02:52,593 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 84 [2020-10-28 15:02:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:52,595 INFO L225 Difference]: With dead ends: 95 [2020-10-28 15:02:52,595 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 15:02:52,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=2763, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:02:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 15:02:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-28 15:02:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 15:02:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2020-10-28 15:02:52,606 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 84 [2020-10-28 15:02:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:52,606 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2020-10-28 15:02:52,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:02:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2020-10-28 15:02:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 15:02:52,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:52,607 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:52,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:02:52,608 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:52,608 INFO L82 PathProgramCache]: Analyzing trace with hash 644016266, now seen corresponding path program 24 times [2020-10-28 15:02:52,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:52,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226927383] [2020-10-28 15:02:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:52,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:53,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:53,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 15:02:53,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1151 [2020-10-28 15:02:53,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:53,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 15:02:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 15:02:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:54,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:54,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:54,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:54,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:54,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:54,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:54,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:54,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:54,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:54,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:54,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:54,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:54,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226927383] [2020-10-28 15:02:54,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:54,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 15:02:54,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375851701] [2020-10-28 15:02:54,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 15:02:54,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:54,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 15:02:54,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:02:54,463 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand 30 states. [2020-10-28 15:02:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:57,809 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2020-10-28 15:02:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:02:57,809 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-10-28 15:02:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:57,811 INFO L225 Difference]: With dead ends: 98 [2020-10-28 15:02:57,811 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 15:02:57,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 15:02:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 15:02:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-28 15:02:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 15:02:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2020-10-28 15:02:57,823 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 87 [2020-10-28 15:02:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:57,823 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2020-10-28 15:02:57,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 15:02:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2020-10-28 15:02:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 15:02:57,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:57,824 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:57,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:02:57,825 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1631147080, now seen corresponding path program 25 times [2020-10-28 15:02:57,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:57,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463901251] [2020-10-28 15:02:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:57,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:58,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:58,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 15:02:58,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:58,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-28 15:02:58,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:58,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:02:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 15:02:58,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:59,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:59,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:59,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:59,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:59,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:59,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:59,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:59,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:59,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463901251] [2020-10-28 15:02:59,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:59,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:02:59,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861987383] [2020-10-28 15:02:59,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:02:59,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:59,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:02:59,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:02:59,520 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand 31 states. [2020-10-28 15:03:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:03,081 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2020-10-28 15:03:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:03:03,082 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 90 [2020-10-28 15:03:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:03,083 INFO L225 Difference]: With dead ends: 101 [2020-10-28 15:03:03,083 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 15:03:03,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=173, Invalid=3249, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:03:03,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 15:03:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-28 15:03:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 15:03:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 121 transitions. [2020-10-28 15:03:03,096 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 121 transitions. Word has length 90 [2020-10-28 15:03:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:03,096 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 121 transitions. [2020-10-28 15:03:03,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:03:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 121 transitions. [2020-10-28 15:03:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 15:03:03,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:03,097 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:03,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:03:03,097 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:03,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2143489590, now seen corresponding path program 26 times [2020-10-28 15:03:03,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:03,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62150151] [2020-10-28 15:03:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:03,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:04,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:04,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 15:03:04,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:04,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-10-28 15:03:04,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:04,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:04,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:03:04,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:04,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 15:03:04,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:04,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:04,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:04,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:04,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:04,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:04,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:04,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:04,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:04,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:04,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62150151] [2020-10-28 15:03:04,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:04,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:03:04,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657221506] [2020-10-28 15:03:04,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:03:04,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:04,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:03:04,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:03:04,949 INFO L87 Difference]: Start difference. First operand 94 states and 121 transitions. Second operand 32 states. [2020-10-28 15:03:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:08,765 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-10-28 15:03:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:03:08,765 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-10-28 15:03:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:08,767 INFO L225 Difference]: With dead ends: 104 [2020-10-28 15:03:08,767 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 15:03:08,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=179, Invalid=3481, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:03:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 15:03:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-28 15:03:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 15:03:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2020-10-28 15:03:08,780 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 93 [2020-10-28 15:03:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:08,780 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2020-10-28 15:03:08,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:03:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2020-10-28 15:03:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 15:03:08,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:08,781 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:08,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:03:08,781 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:08,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:08,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1025435016, now seen corresponding path program 27 times [2020-10-28 15:03:08,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:08,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322931738] [2020-10-28 15:03:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:08,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:09,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:09,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 15:03:09,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:09,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-28 15:03:09,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:09,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:09,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 15:03:09,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:09,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 15:03:09,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:10,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:10,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:10,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:10,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:10,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:10,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:10,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:10,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:10,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:10,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:10,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:10,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:10,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322931738] [2020-10-28 15:03:10,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:10,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 15:03:10,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541424489] [2020-10-28 15:03:10,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 15:03:10,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:10,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 15:03:10,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:03:10,846 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand 33 states. [2020-10-28 15:03:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:14,965 INFO L93 Difference]: Finished difference Result 107 states and 136 transitions. [2020-10-28 15:03:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:03:14,966 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 96 [2020-10-28 15:03:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:14,967 INFO L225 Difference]: With dead ends: 107 [2020-10-28 15:03:14,967 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 15:03:14,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=185, Invalid=3721, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 15:03:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 15:03:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-28 15:03:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 15:03:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2020-10-28 15:03:14,981 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 96 [2020-10-28 15:03:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:14,981 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2020-10-28 15:03:14,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 15:03:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2020-10-28 15:03:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 15:03:14,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:14,982 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:14,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:03:14,983 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash -533001462, now seen corresponding path program 28 times [2020-10-28 15:03:14,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:14,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295119383] [2020-10-28 15:03:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:15,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:16,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:16,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 15:03:16,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-28 15:03:16,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:16,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 15:03:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 15:03:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:16,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:16,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:16,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:16,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:16,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:16,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:16,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:16,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:16,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:16,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:16,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:16,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:17,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295119383] [2020-10-28 15:03:17,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:17,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 15:03:17,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105017089] [2020-10-28 15:03:17,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 15:03:17,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:17,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 15:03:17,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:03:17,010 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand 34 states. [2020-10-28 15:03:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:21,402 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2020-10-28 15:03:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 15:03:21,403 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 99 [2020-10-28 15:03:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:21,404 INFO L225 Difference]: With dead ends: 110 [2020-10-28 15:03:21,405 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 15:03:21,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=191, Invalid=3969, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 15:03:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 15:03:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-28 15:03:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 15:03:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2020-10-28 15:03:21,419 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 99 [2020-10-28 15:03:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:21,420 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2020-10-28 15:03:21,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 15:03:21,420 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2020-10-28 15:03:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 15:03:21,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:21,421 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:21,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:03:21,421 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:21,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2053277384, now seen corresponding path program 29 times [2020-10-28 15:03:21,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:21,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028220187] [2020-10-28 15:03:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:21,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:22,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:22,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 15:03:22,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:22,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-28 15:03:22,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:22,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:22,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 15:03:22,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:22,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 15:03:22,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:23,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:23,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:23,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:23,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:23,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:23,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:23,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:23,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:23,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:23,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:23,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:23,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:23,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028220187] [2020-10-28 15:03:23,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:23,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 15:03:23,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534611828] [2020-10-28 15:03:23,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 15:03:23,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 15:03:23,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:03:23,457 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand 35 states. [2020-10-28 15:03:28,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:28,112 INFO L93 Difference]: Finished difference Result 113 states and 144 transitions. [2020-10-28 15:03:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 15:03:28,113 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 102 [2020-10-28 15:03:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:28,114 INFO L225 Difference]: With dead ends: 113 [2020-10-28 15:03:28,114 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 15:03:28,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=197, Invalid=4225, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 15:03:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 15:03:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-28 15:03:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 15:03:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2020-10-28 15:03:28,124 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 102 [2020-10-28 15:03:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:28,124 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2020-10-28 15:03:28,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 15:03:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2020-10-28 15:03:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 15:03:28,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:28,125 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:28,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:03:28,126 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:28,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2131833930, now seen corresponding path program 30 times [2020-10-28 15:03:28,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:28,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542136342] [2020-10-28 15:03:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:28,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:29,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:29,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 15:03:29,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:29,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1170 [2020-10-28 15:03:29,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:29,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:29,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 15:03:29,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:29,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-28 15:03:29,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:30,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:30,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:30,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:30,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:30,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:30,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:30,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:30,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:30,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:30,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542136342] [2020-10-28 15:03:30,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:30,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 15:03:30,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174126444] [2020-10-28 15:03:30,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 15:03:30,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:30,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 15:03:30,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:03:30,371 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand 36 states. [2020-10-28 15:03:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:35,340 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-10-28 15:03:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 15:03:35,341 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 105 [2020-10-28 15:03:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:35,343 INFO L225 Difference]: With dead ends: 116 [2020-10-28 15:03:35,343 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 15:03:35,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=203, Invalid=4489, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 15:03:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 15:03:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-28 15:03:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 15:03:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2020-10-28 15:03:35,356 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 105 [2020-10-28 15:03:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:35,357 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2020-10-28 15:03:35,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 15:03:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2020-10-28 15:03:35,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 15:03:35,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:35,358 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:35,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:03:35,358 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:35,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:35,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2117613576, now seen corresponding path program 31 times [2020-10-28 15:03:35,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:35,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861806613] [2020-10-28 15:03:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:35,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:36,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:36,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 15:03:36,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:36,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1267 [2020-10-28 15:03:36,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:36,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 15:03:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 15:03:36,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:37,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:37,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:37,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:37,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:37,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:37,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:37,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:37,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:37,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:37,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861806613] [2020-10-28 15:03:37,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:37,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 15:03:37,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933430391] [2020-10-28 15:03:37,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 15:03:37,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:37,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 15:03:37,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:03:37,756 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand 37 states. [2020-10-28 15:03:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:43,091 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2020-10-28 15:03:43,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 15:03:43,092 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 108 [2020-10-28 15:03:43,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:43,093 INFO L225 Difference]: With dead ends: 119 [2020-10-28 15:03:43,094 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 15:03:43,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=209, Invalid=4761, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 15:03:43,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 15:03:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-28 15:03:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 15:03:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 145 transitions. [2020-10-28 15:03:43,107 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 145 transitions. Word has length 108 [2020-10-28 15:03:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:43,107 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 145 transitions. [2020-10-28 15:03:43,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 15:03:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 145 transitions. [2020-10-28 15:03:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 15:03:43,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:43,108 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:43,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:03:43,109 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1047752074, now seen corresponding path program 32 times [2020-10-28 15:03:43,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:43,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551685861] [2020-10-28 15:03:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:43,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:44,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:44,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 15:03:44,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:44,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1366 [2020-10-28 15:03:44,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:44,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 15:03:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:44,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 15:03:44,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:45,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:45,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:45,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:45,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:45,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:45,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:03:45,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:45,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:45,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:45,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:45,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:45,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:45,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551685861] [2020-10-28 15:03:45,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:45,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 15:03:45,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142639550] [2020-10-28 15:03:45,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 15:03:45,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:45,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 15:03:45,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 15:03:45,654 INFO L87 Difference]: Start difference. First operand 112 states and 145 transitions. Second operand 38 states. [2020-10-28 15:03:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:51,058 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2020-10-28 15:03:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 15:03:51,059 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 111 [2020-10-28 15:03:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:51,060 INFO L225 Difference]: With dead ends: 122 [2020-10-28 15:03:51,060 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 15:03:51,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=215, Invalid=5041, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 15:03:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 15:03:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-28 15:03:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 15:03:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2020-10-28 15:03:51,071 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 111 [2020-10-28 15:03:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:51,071 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2020-10-28 15:03:51,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 15:03:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2020-10-28 15:03:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 15:03:51,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:51,072 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:51,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:03:51,072 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash 153880248, now seen corresponding path program 33 times [2020-10-28 15:03:51,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:51,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810690133] [2020-10-28 15:03:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:51,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:52,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:52,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 15:03:52,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:52,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1324 [2020-10-28 15:03:52,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:52,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:52,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 15:03:52,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:03:52,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 15:03:52,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:53,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:03:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:53,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:03:53,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:03:53,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:03:53,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:03:53,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:03:53,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:03:53,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:03:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:03:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:03:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:03:53,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:03:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:03:53,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810690133] [2020-10-28 15:03:53,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:03:53,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 15:03:53,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331401440] [2020-10-28 15:03:53,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 15:03:53,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:03:53,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 15:03:53,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:03:53,579 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand 39 states. [2020-10-28 15:03:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:03:59,328 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-10-28 15:03:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 15:03:59,329 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 114 [2020-10-28 15:03:59,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:03:59,330 INFO L225 Difference]: With dead ends: 125 [2020-10-28 15:03:59,330 INFO L226 Difference]: Without dead ends: 118 [2020-10-28 15:03:59,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=221, Invalid=5329, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 15:03:59,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-28 15:03:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-28 15:03:59,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 15:03:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 153 transitions. [2020-10-28 15:03:59,356 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 153 transitions. Word has length 114 [2020-10-28 15:03:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:03:59,356 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 153 transitions. [2020-10-28 15:03:59,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 15:03:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 153 transitions. [2020-10-28 15:03:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 15:03:59,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:03:59,358 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:03:59,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:03:59,358 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:03:59,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:03:59,358 INFO L82 PathProgramCache]: Analyzing trace with hash -384452918, now seen corresponding path program 34 times [2020-10-28 15:03:59,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:03:59,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468128939] [2020-10-28 15:03:59,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:03:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:03:59,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:00,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:00,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 15:04:00,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:00,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-28 15:04:00,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:00,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:00,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 15:04:00,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:00,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-28 15:04:00,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:02,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:02,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:02,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:02,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:02,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:02,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:02,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:02,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:02,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:02,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:02,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:02,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:02,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468128939] [2020-10-28 15:04:02,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:02,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 15:04:02,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333607434] [2020-10-28 15:04:02,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 15:04:02,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:02,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 15:04:02,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:04:02,123 INFO L87 Difference]: Start difference. First operand 118 states and 153 transitions. Second operand 40 states. [2020-10-28 15:04:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:08,239 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2020-10-28 15:04:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 15:04:08,239 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2020-10-28 15:04:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:08,241 INFO L225 Difference]: With dead ends: 128 [2020-10-28 15:04:08,241 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 15:04:08,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=227, Invalid=5625, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 15:04:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 15:04:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-28 15:04:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 15:04:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 157 transitions. [2020-10-28 15:04:08,257 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 157 transitions. Word has length 117 [2020-10-28 15:04:08,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:08,258 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 157 transitions. [2020-10-28 15:04:08,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 15:04:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 157 transitions. [2020-10-28 15:04:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 15:04:08,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:08,259 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:08,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:04:08,259 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:08,260 INFO L82 PathProgramCache]: Analyzing trace with hash -459917960, now seen corresponding path program 35 times [2020-10-28 15:04:08,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:08,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345630854] [2020-10-28 15:04:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:08,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:09,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:09,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 15:04:09,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:09,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1478 [2020-10-28 15:04:09,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:09,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 15:04:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:09,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 15:04:09,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:11,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:11,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:11,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:11,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:11,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:11,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:11,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:11,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:11,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:11,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:11,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:11,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:11,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345630854] [2020-10-28 15:04:11,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:11,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 15:04:11,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745095835] [2020-10-28 15:04:11,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 15:04:11,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:11,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 15:04:11,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:04:11,103 INFO L87 Difference]: Start difference. First operand 121 states and 157 transitions. Second operand 41 states. [2020-10-28 15:04:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:17,479 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2020-10-28 15:04:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 15:04:17,480 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 120 [2020-10-28 15:04:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:17,481 INFO L225 Difference]: With dead ends: 131 [2020-10-28 15:04:17,481 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 15:04:17,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=233, Invalid=5929, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 15:04:17,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 15:04:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-28 15:04:17,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 15:04:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2020-10-28 15:04:17,495 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 120 [2020-10-28 15:04:17,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:17,496 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2020-10-28 15:04:17,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 15:04:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2020-10-28 15:04:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 15:04:17,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:17,497 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:17,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:04:17,497 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:17,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1923878922, now seen corresponding path program 36 times [2020-10-28 15:04:17,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:17,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491865695] [2020-10-28 15:04:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:17,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:19,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:19,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 15:04:19,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:19,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1510 [2020-10-28 15:04:19,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:19,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:19,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 15:04:19,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:19,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-28 15:04:19,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:20,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:20,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:20,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:20,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:20,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:20,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:20,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:20,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:20,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:20,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491865695] [2020-10-28 15:04:20,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:20,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 15:04:20,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075911267] [2020-10-28 15:04:20,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 15:04:20,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:20,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 15:04:20,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 15:04:20,448 INFO L87 Difference]: Start difference. First operand 124 states and 161 transitions. Second operand 42 states. [2020-10-28 15:04:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:27,209 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-10-28 15:04:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 15:04:27,210 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 123 [2020-10-28 15:04:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:27,211 INFO L225 Difference]: With dead ends: 134 [2020-10-28 15:04:27,211 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 15:04:27,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=239, Invalid=6241, Unknown=0, NotChecked=0, Total=6480 [2020-10-28 15:04:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 15:04:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-28 15:04:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 15:04:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2020-10-28 15:04:27,231 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 123 [2020-10-28 15:04:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:27,232 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2020-10-28 15:04:27,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 15:04:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2020-10-28 15:04:27,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 15:04:27,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:27,233 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:27,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:04:27,233 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:27,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:27,233 INFO L82 PathProgramCache]: Analyzing trace with hash 332551224, now seen corresponding path program 37 times [2020-10-28 15:04:27,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:27,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346616892] [2020-10-28 15:04:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:27,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:28,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:28,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 15:04:28,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:28,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1566 [2020-10-28 15:04:28,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:28,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 15:04:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 15:04:28,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:30,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:30,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:30,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:30,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:30,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:30,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:04:30,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:30,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:30,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:30,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:30,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:30,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:30,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346616892] [2020-10-28 15:04:30,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:30,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 15:04:30,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238444499] [2020-10-28 15:04:30,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 15:04:30,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:30,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 15:04:30,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:04:30,313 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand 43 states. [2020-10-28 15:04:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:37,371 INFO L93 Difference]: Finished difference Result 137 states and 176 transitions. [2020-10-28 15:04:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 15:04:37,372 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 126 [2020-10-28 15:04:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:37,374 INFO L225 Difference]: With dead ends: 137 [2020-10-28 15:04:37,374 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 15:04:37,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=245, Invalid=6561, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 15:04:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 15:04:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-28 15:04:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 15:04:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 169 transitions. [2020-10-28 15:04:37,389 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 169 transitions. Word has length 126 [2020-10-28 15:04:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:37,390 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 169 transitions. [2020-10-28 15:04:37,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 15:04:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 169 transitions. [2020-10-28 15:04:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 15:04:37,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:37,390 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:37,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:04:37,391 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash 938113354, now seen corresponding path program 38 times [2020-10-28 15:04:37,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:37,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154206806] [2020-10-28 15:04:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:37,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:39,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 15:04:39,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1805 [2020-10-28 15:04:39,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:39,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 15:04:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-28 15:04:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:40,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:40,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:40,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:40,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:40,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:40,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:40,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:40,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:40,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:40,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:40,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:40,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154206806] [2020-10-28 15:04:40,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:40,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 15:04:40,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973088521] [2020-10-28 15:04:40,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 15:04:40,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:40,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 15:04:40,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:04:40,804 INFO L87 Difference]: Start difference. First operand 130 states and 169 transitions. Second operand 44 states. [2020-10-28 15:04:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:48,327 INFO L93 Difference]: Finished difference Result 140 states and 180 transitions. [2020-10-28 15:04:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 15:04:48,328 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 129 [2020-10-28 15:04:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:48,329 INFO L225 Difference]: With dead ends: 140 [2020-10-28 15:04:48,329 INFO L226 Difference]: Without dead ends: 133 [2020-10-28 15:04:48,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=251, Invalid=6889, Unknown=0, NotChecked=0, Total=7140 [2020-10-28 15:04:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-28 15:04:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-28 15:04:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 15:04:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2020-10-28 15:04:48,344 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 129 [2020-10-28 15:04:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:48,344 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2020-10-28 15:04:48,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 15:04:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2020-10-28 15:04:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 15:04:48,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:48,345 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:48,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:04:48,345 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:48,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1918082312, now seen corresponding path program 39 times [2020-10-28 15:04:48,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:48,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004337871] [2020-10-28 15:04:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:48,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:50,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:50,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 15:04:50,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:50,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1671 [2020-10-28 15:04:50,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:50,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 15:04:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-28 15:04:50,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:51,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:51,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:51,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:51,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:51,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:51,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:04:51,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:51,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:51,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:51,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004337871] [2020-10-28 15:04:51,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:51,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 15:04:51,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110293376] [2020-10-28 15:04:51,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 15:04:51,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:51,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 15:04:51,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:04:51,740 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand 45 states. [2020-10-28 15:04:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:59,728 INFO L93 Difference]: Finished difference Result 143 states and 184 transitions. [2020-10-28 15:04:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 15:04:59,729 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 132 [2020-10-28 15:04:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:59,731 INFO L225 Difference]: With dead ends: 143 [2020-10-28 15:04:59,731 INFO L226 Difference]: Without dead ends: 136 [2020-10-28 15:04:59,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=257, Invalid=7225, Unknown=0, NotChecked=0, Total=7482 [2020-10-28 15:04:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-28 15:04:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-28 15:04:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 15:04:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 177 transitions. [2020-10-28 15:04:59,749 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 177 transitions. Word has length 132 [2020-10-28 15:04:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:59,749 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 177 transitions. [2020-10-28 15:04:59,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 15:04:59,750 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 177 transitions. [2020-10-28 15:04:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 15:04:59,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:59,751 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:59,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:04:59,751 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:59,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:59,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1048900234, now seen corresponding path program 40 times [2020-10-28 15:04:59,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:59,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637178772] [2020-10-28 15:04:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:59,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:02,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 15:05:02,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:02,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2328 [2020-10-28 15:05:02,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:02,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 15:05:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:02,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 15:05:02,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:03,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:03,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:03,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:03,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:03,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:03,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:03,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:03,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:03,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:03,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:03,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:03,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637178772] [2020-10-28 15:05:04,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:04,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 15:05:04,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258667343] [2020-10-28 15:05:04,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 15:05:04,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:04,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 15:05:04,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 15:05:04,008 INFO L87 Difference]: Start difference. First operand 136 states and 177 transitions. Second operand 46 states. [2020-10-28 15:05:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:12,363 INFO L93 Difference]: Finished difference Result 146 states and 188 transitions. [2020-10-28 15:05:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 15:05:12,364 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 135 [2020-10-28 15:05:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:12,368 INFO L225 Difference]: With dead ends: 146 [2020-10-28 15:05:12,369 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 15:05:12,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=263, Invalid=7569, Unknown=0, NotChecked=0, Total=7832 [2020-10-28 15:05:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 15:05:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-28 15:05:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-28 15:05:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2020-10-28 15:05:12,386 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 135 [2020-10-28 15:05:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:12,387 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2020-10-28 15:05:12,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 15:05:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2020-10-28 15:05:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-28 15:05:12,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:12,387 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:12,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:05:12,388 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:12,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1023560, now seen corresponding path program 41 times [2020-10-28 15:05:12,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:12,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512840433] [2020-10-28 15:05:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:12,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:14,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:14,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 15:05:14,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:14,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1955 [2020-10-28 15:05:14,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:14,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 15:05:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:14,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-28 15:05:14,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:16,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:16,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:16,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:16,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:16,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:16,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:16,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:16,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:16,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:16,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512840433] [2020-10-28 15:05:16,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:16,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 15:05:16,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477276903] [2020-10-28 15:05:16,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 15:05:16,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 15:05:16,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:05:16,283 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand 47 states. [2020-10-28 15:05:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:25,159 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2020-10-28 15:05:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 15:05:25,160 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 138 [2020-10-28 15:05:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:25,162 INFO L225 Difference]: With dead ends: 149 [2020-10-28 15:05:25,162 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 15:05:25,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=269, Invalid=7921, Unknown=0, NotChecked=0, Total=8190 [2020-10-28 15:05:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 15:05:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-28 15:05:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 15:05:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2020-10-28 15:05:25,181 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 138 [2020-10-28 15:05:25,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:25,182 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2020-10-28 15:05:25,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 15:05:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2020-10-28 15:05:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-28 15:05:25,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:25,183 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:25,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:05:25,183 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:25,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1966046154, now seen corresponding path program 42 times [2020-10-28 15:05:25,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:25,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813514504] [2020-10-28 15:05:25,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:25,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:27,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:27,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-28 15:05:27,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:27,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2091 [2020-10-28 15:05:27,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:27,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 15:05:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-28 15:05:27,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:29,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:29,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:29,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:29,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:29,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:05:29,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:29,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:29,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:29,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:29,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:29,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:29,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813514504] [2020-10-28 15:05:29,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:29,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 15:05:29,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446311571] [2020-10-28 15:05:29,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 15:05:29,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:29,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 15:05:29,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 15:05:29,434 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand 48 states. [2020-10-28 15:05:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:39,026 INFO L93 Difference]: Finished difference Result 152 states and 196 transitions. [2020-10-28 15:05:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 15:05:39,027 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 141 [2020-10-28 15:05:39,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:39,028 INFO L225 Difference]: With dead ends: 152 [2020-10-28 15:05:39,028 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 15:05:39,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=275, Invalid=8281, Unknown=0, NotChecked=0, Total=8556 [2020-10-28 15:05:39,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 15:05:39,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-28 15:05:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 15:05:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 189 transitions. [2020-10-28 15:05:39,043 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 189 transitions. Word has length 141 [2020-10-28 15:05:39,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:39,043 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 189 transitions. [2020-10-28 15:05:39,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 15:05:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 189 transitions. [2020-10-28 15:05:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-28 15:05:39,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:39,044 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:39,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:05:39,045 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:39,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:39,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1888857992, now seen corresponding path program 43 times [2020-10-28 15:05:39,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:39,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347044385] [2020-10-28 15:05:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:39,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:41,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:41,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 15:05:41,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:41,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2412 [2020-10-28 15:05:41,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:41,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 15:05:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:41,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-28 15:05:41,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:43,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:43,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:43,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:43,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:43,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:05:43,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:43,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:43,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:43,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:43,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:43,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:43,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347044385] [2020-10-28 15:05:43,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:43,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 15:05:43,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650194989] [2020-10-28 15:05:43,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 15:05:43,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:43,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 15:05:43,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:05:43,756 INFO L87 Difference]: Start difference. First operand 145 states and 189 transitions. Second operand 49 states.