/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:59:02,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:59:02,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:59:02,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:59:02,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:59:02,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:59:02,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:59:02,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:59:02,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:59:02,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:59:02,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:59:02,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:59:02,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:59:02,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:59:02,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:59:02,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:59:02,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:59:02,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:59:02,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:59:02,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:59:02,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:59:02,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:59:02,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:59:02,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:59:02,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:59:02,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:59:02,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:59:02,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:59:02,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:59:02,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-29 03:59:02,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:59:02,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:59:02,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:59:02,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 03:59:02,784 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:59:02,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:59:02,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:59:02,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:59:02,787 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:59:02,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:59:02,788 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:59:02,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:59:02,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:59:02,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:59:02,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:59:02,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:59:02,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:59:02,789 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:59:02,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:59:02,790 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:59:02,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:59:02,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:59:02,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:59:02,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:59:02,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:59:02,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:59:02,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:59:02,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:59:02,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:59:02,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:59:02,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:59:02,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:59:02,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:59:02,794 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:59:03,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:59:03,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:59:03,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:59:03,228 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:59:03,229 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:59:03,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i [2020-10-29 03:59:03,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ef9e31d3/c53c721f3dac4e0bb3ff91322ef4557f/FLAGe1c9a69a6 [2020-10-29 03:59:03,952 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:59:03,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i [2020-10-29 03:59:03,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ef9e31d3/c53c721f3dac4e0bb3ff91322ef4557f/FLAGe1c9a69a6 [2020-10-29 03:59:04,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ef9e31d3/c53c721f3dac4e0bb3ff91322ef4557f [2020-10-29 03:59:04,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:59:04,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:59:04,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:59:04,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:59:04,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:59:04,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:59:04" (1/1) ... [2020-10-29 03:59:04,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1502a49e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:04, skipping insertion in model container [2020-10-29 03:59:04,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:59:04" (1/1) ... [2020-10-29 03:59:04,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:59:04,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:59:04,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:59:06,283 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:59:06,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:59:06,332 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:59:06,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:06 WrapperNode [2020-10-29 03:59:06,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:59:06,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:59:06,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:59:06,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:59:06,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:06" (1/1) ... [2020-10-29 03:59:06,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:06" (1/1) ... [2020-10-29 03:59:06,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:06" (1/1) ... [2020-10-29 03:59:06,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:06" (1/1) ... [2020-10-29 03:59:06,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:06" (1/1) ... [2020-10-29 03:59:06,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:06" (1/1) ... [2020-10-29 03:59:06,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:06" (1/1) ... [2020-10-29 03:59:06,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:59:06,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:59:06,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:59:06,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:59:06,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:59:06,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:59:06,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:59:06,491 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:59:06,491 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:59:06,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:59:06,491 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:59:06,491 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:59:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 03:59:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 03:59:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:59:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:59:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:59:06,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:59:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:59:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:59:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:59:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:59:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:59:06,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:59:06,877 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:59:06,878 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 03:59:06,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:59:06 BoogieIcfgContainer [2020-10-29 03:59:06,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:59:06,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:59:06,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:59:06,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:59:06,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:59:04" (1/3) ... [2020-10-29 03:59:06,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b6dac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:59:06, skipping insertion in model container [2020-10-29 03:59:06,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:06" (2/3) ... [2020-10-29 03:59:06,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b6dac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:59:06, skipping insertion in model container [2020-10-29 03:59:06,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:59:06" (3/3) ... [2020-10-29 03:59:06,890 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.i [2020-10-29 03:59:06,903 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:59:06,909 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:59:06,927 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:59:06,957 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:59:06,958 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:59:06,958 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:59:06,958 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:59:06,958 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:59:06,959 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:59:06,959 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:59:06,959 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:59:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-29 03:59:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 03:59:07,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:07,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:07,030 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:07,038 INFO L82 PathProgramCache]: Analyzing trace with hash -110565287, now seen corresponding path program 1 times [2020-10-29 03:59:07,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:07,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602137764] [2020-10-29 03:59:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:07,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:07,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:07,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 03:59:07,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:07,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-29 03:59:07,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:07,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:07,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:07,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:59:07,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:07,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 03:59:07,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:07,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:07,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:07,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:07,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:07,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 03:59:07,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:07,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:07,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:07,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:07,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:07,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:07,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602137764] [2020-10-29 03:59:07,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:59:07,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 03:59:07,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484311749] [2020-10-29 03:59:07,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 03:59:07,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:07,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 03:59:07,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 03:59:07,552 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-29 03:59:07,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:07,690 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-10-29 03:59:07,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 03:59:07,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-29 03:59:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:07,701 INFO L225 Difference]: With dead ends: 59 [2020-10-29 03:59:07,702 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 03:59:07,705 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 [2020-10-29 03:59:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 03:59:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2020-10-29 03:59:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 03:59:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-29 03:59:07,751 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-29 03:59:07,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:07,752 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-29 03:59:07,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 03:59:07,752 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-29 03:59:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 03:59:07,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:07,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:07,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:59:07,754 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:07,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2144226899, now seen corresponding path program 1 times [2020-10-29 03:59:07,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:07,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706495800] [2020-10-29 03:59:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:07,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:07,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:07,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 03:59:07,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:07,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-29 03:59:07,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:07,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:07,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:07,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:59:07,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:07,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:07,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:07,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:07,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:07,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:07,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 03:59:07,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:07,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:07,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:07,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:07,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:07,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:07,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706495800] [2020-10-29 03:59:07,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:59:07,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 03:59:07,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206816481] [2020-10-29 03:59:07,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 03:59:07,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:07,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 03:59:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 03:59:07,963 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-29 03:59:08,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:08,084 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-29 03:59:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 03:59:08,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-29 03:59:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:08,086 INFO L225 Difference]: With dead ends: 43 [2020-10-29 03:59:08,086 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 03:59:08,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:59:08,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 03:59:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-29 03:59:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 03:59:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-29 03:59:08,097 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-10-29 03:59:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:08,097 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-29 03:59:08,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 03:59:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-29 03:59:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 03:59:08,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:08,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:08,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:59:08,100 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash -246080399, now seen corresponding path program 1 times [2020-10-29 03:59:08,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:08,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339530728] [2020-10-29 03:59:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:08,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:08,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 03:59:08,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:59:08,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-29 03:59:08,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:08,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:08,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 03:59:08,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:59:08,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 03:59:08,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:59:08,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:08,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:08,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:08,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:08,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:08,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:59:08,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:08,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:08,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:08,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:08,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:08,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:08,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339530728] [2020-10-29 03:59:08,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:08,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 03:59:08,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209875940] [2020-10-29 03:59:08,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 03:59:08,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:08,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 03:59:08,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:59:08,870 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2020-10-29 03:59:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:09,305 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-29 03:59:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:59:09,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-29 03:59:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:09,307 INFO L225 Difference]: With dead ends: 50 [2020-10-29 03:59:09,308 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 03:59:09,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:59:09,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 03:59:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-29 03:59:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 03:59:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-29 03:59:09,317 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-10-29 03:59:09,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:09,318 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-29 03:59:09,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 03:59:09,318 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-29 03:59:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 03:59:09,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:09,319 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:09,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:59:09,320 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:09,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1377191, now seen corresponding path program 1 times [2020-10-29 03:59:09,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:09,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586057051] [2020-10-29 03:59:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:09,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:09,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:09,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:10,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 03:59:10,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:59:10,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 866 [2020-10-29 03:59:10,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:10,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:10,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:59:10,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:10,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 03:59:10,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:10,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:10,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:10,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:10,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:10,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 03:59:10,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:10,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:10,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:10,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:10,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:10,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:10,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 03:59:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:10,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:10,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:10,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:10,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:10,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:59:10,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:10,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:59:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:59:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:10,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586057051] [2020-10-29 03:59:10,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:10,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:59:10,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021962975] [2020-10-29 03:59:10,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:59:10,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:10,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:59:10,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:59:10,483 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2020-10-29 03:59:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:11,390 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-29 03:59:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:59:11,391 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-29 03:59:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:11,393 INFO L225 Difference]: With dead ends: 55 [2020-10-29 03:59:11,393 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 03:59:11,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:59:11,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 03:59:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-29 03:59:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 03:59:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-29 03:59:11,411 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-10-29 03:59:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:11,412 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-29 03:59:11,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:59:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-29 03:59:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 03:59:11,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:11,414 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:11,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:59:11,416 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:11,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1485361019, now seen corresponding path program 2 times [2020-10-29 03:59:11,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:11,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770317557] [2020-10-29 03:59:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:11,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:11,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:11,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:11,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 03:59:11,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:59:11,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-29 03:59:11,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:11,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:11,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 03:59:11,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:11,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:59:11,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:12,207 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-29 03:59:12,360 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-29 03:59:12,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:12,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:12,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:12,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:12,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:12,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 03:59:12,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:12,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:12,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:12,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-29 03:59:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:12,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:12,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:12,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:12,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:12,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:59:12,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:12,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:12,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:59:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:59:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:12,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:12,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770317557] [2020-10-29 03:59:12,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:12,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:59:12,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257287670] [2020-10-29 03:59:12,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:59:12,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:12,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:59:12,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:59:12,621 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 13 states. [2020-10-29 03:59:13,115 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-29 03:59:13,350 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-29 03:59:13,612 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-29 03:59:13,800 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-29 03:59:14,001 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-29 03:59:14,174 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-29 03:59:14,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:14,475 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-10-29 03:59:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:59:14,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-29 03:59:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:14,477 INFO L225 Difference]: With dead ends: 57 [2020-10-29 03:59:14,477 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 03:59:14,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:59:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 03:59:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 03:59:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 03:59:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-29 03:59:14,486 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-10-29 03:59:14,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:14,486 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-29 03:59:14,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:59:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-29 03:59:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 03:59:14,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:14,488 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:14,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:59:14,488 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:14,489 INFO L82 PathProgramCache]: Analyzing trace with hash 16671261, now seen corresponding path program 3 times [2020-10-29 03:59:14,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:14,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949065959] [2020-10-29 03:59:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:14,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:14,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:14,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:14,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 03:59:14,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:59:14,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-29 03:59:14,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:14,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:14,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:59:14,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:14,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 03:59:14,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:15,550 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-29 03:59:15,853 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2020-10-29 03:59:16,136 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-10-29 03:59:16,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:16,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:16,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:16,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:16,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:16,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 03:59:16,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:16,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:16,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:16,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 03:59:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:16,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:16,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:16,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:16,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:59:16,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:16,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:59:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:59:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:16,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:16,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949065959] [2020-10-29 03:59:16,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:16,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:59:16,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964165605] [2020-10-29 03:59:16,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:59:16,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:59:16,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:59:16,358 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 15 states. [2020-10-29 03:59:17,057 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-29 03:59:17,497 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-29 03:59:17,942 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-29 03:59:18,185 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-29 03:59:18,478 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-29 03:59:18,740 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-29 03:59:19,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:19,180 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-29 03:59:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:59:19,181 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-29 03:59:19,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:19,182 INFO L225 Difference]: With dead ends: 59 [2020-10-29 03:59:19,183 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 03:59:19,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:59:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 03:59:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-29 03:59:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 03:59:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-29 03:59:19,198 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2020-10-29 03:59:19,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:19,199 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-29 03:59:19,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:59:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-29 03:59:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 03:59:19,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:19,200 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:19,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:59:19,200 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1650054207, now seen corresponding path program 4 times [2020-10-29 03:59:19,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:19,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483864106] [2020-10-29 03:59:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:19,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:19,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:19,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:19,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 03:59:19,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:59:19,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-29 03:59:19,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:19,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:19,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:59:19,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:19,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 03:59:19,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:20,421 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-29 03:59:20,737 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-29 03:59:21,114 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-29 03:59:21,789 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-29 03:59:22,289 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2020-10-29 03:59:22,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:22,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:22,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:22,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:22,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:22,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 03:59:22,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:22,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:22,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:22,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:22,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:22,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:22,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-29 03:59:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:22,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:22,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:22,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:22,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:22,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:59:22,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:22,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:59:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:59:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:22,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:22,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483864106] [2020-10-29 03:59:22,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:22,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:59:22,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792169396] [2020-10-29 03:59:22,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:59:22,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:22,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:59:22,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:59:22,555 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 17 states. [2020-10-29 03:59:24,039 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-29 03:59:24,882 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-29 03:59:25,728 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-29 03:59:26,192 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-29 03:59:26,668 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-29 03:59:27,176 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-29 03:59:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:27,693 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2020-10-29 03:59:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:59:27,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-10-29 03:59:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:27,696 INFO L225 Difference]: With dead ends: 61 [2020-10-29 03:59:27,696 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 03:59:27,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:59:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 03:59:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 03:59:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 03:59:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-29 03:59:27,705 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 32 [2020-10-29 03:59:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:27,706 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-29 03:59:27,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:59:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-29 03:59:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 03:59:27,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:27,707 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:27,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:59:27,707 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:27,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash -626965023, now seen corresponding path program 5 times [2020-10-29 03:59:27,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:27,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906698791] [2020-10-29 03:59:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:27,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:27,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:28,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:28,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 03:59:28,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:59:28,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-29 03:59:28,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:28,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:28,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:59:28,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:28,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 03:59:28,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:30,388 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-29 03:59:30,591 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-29 03:59:30,983 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2020-10-29 03:59:31,467 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-29 03:59:32,453 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 68 [2020-10-29 03:59:33,648 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 71 [2020-10-29 03:59:35,606 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 83 [2020-10-29 03:59:36,770 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 82 [2020-10-29 03:59:36,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:36,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:36,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:36,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:36,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 03:59:36,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:36,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:36,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-29 03:59:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:36,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:36,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:59:36,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:59:36,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:36,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:59:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:59:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:59:36,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:37,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906698791] [2020-10-29 03:59:37,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:37,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:59:37,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874993764] [2020-10-29 03:59:37,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:59:37,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:37,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:59:37,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:59:37,128 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 19 states. [2020-10-29 03:59:40,657 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2020-10-29 03:59:42,054 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-10-29 03:59:43,173 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2020-10-29 03:59:43,960 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-29 03:59:44,633 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 03:59:45,472 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-29 03:59:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:46,021 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-10-29 03:59:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:59:46,021 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-29 03:59:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:46,022 INFO L225 Difference]: With dead ends: 63 [2020-10-29 03:59:46,023 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 03:59:46,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:59:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 03:59:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-29 03:59:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 03:59:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-29 03:59:46,033 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2020-10-29 03:59:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:46,033 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-29 03:59:46,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:59:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-29 03:59:46,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 03:59:46,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:46,035 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:46,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:59:46,035 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:46,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1590875907, now seen corresponding path program 6 times [2020-10-29 03:59:46,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:46,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656430445] [2020-10-29 03:59:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:46,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:46,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:46,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:46,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 03:59:46,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:59:46,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-29 03:59:46,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:46,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:46,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:59:46,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:46,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:59:46,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:53,029 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-29 03:59:53,342 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-29 03:59:53,770 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-29 03:59:54,319 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-29 03:59:55,240 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-29 03:59:56,343 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-29 03:59:58,417 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 75 [2020-10-29 04:00:01,563 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 78 [2020-10-29 04:00:06,103 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 87 [2020-10-29 04:00:08,144 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 145 DAG size of output: 80 [2020-10-29 04:00:08,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:08,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:08,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:08,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:08,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:08,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 04:00:08,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:08,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:00:08,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:08,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 04:00:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:08,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:08,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:08,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:00:08,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:08,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:00:08,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:08,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:08,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 04:00:08,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 04:00:08,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:00:08,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:00:08,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656430445] [2020-10-29 04:00:08,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:08,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 04:00:08,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511514812] [2020-10-29 04:00:08,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 04:00:08,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 04:00:08,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-10-29 04:00:08,655 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 21 states. [2020-10-29 04:00:18,716 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2020-10-29 04:00:23,224 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2020-10-29 04:00:26,041 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2020-10-29 04:00:28,624 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-29 04:00:30,480 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-29 04:00:32,716 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 04:00:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:35,227 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-10-29 04:00:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 04:00:35,229 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-10-29 04:00:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:35,230 INFO L225 Difference]: With dead ends: 65 [2020-10-29 04:00:35,230 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 04:00:35,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2020-10-29 04:00:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 04:00:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 04:00:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 04:00:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-29 04:00:35,240 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2020-10-29 04:00:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:35,241 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-29 04:00:35,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 04:00:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-29 04:00:35,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 04:00:35,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:35,242 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:35,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 04:00:35,242 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:35,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:35,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1662736475, now seen corresponding path program 7 times [2020-10-29 04:00:35,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:35,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556637307] [2020-10-29 04:00:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:35,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:35,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:35,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:35,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 04:00:35,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 04:00:35,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-29 04:00:35,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:35,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:35,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 04:00:35,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:35,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 04:00:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:01:05,469 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-29 04:01:05,719 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-29 04:01:06,170 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-29 04:01:06,807 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-29 04:01:08,055 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-29 04:01:10,197 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-29 04:01:13,383 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 75 [2020-10-29 04:01:18,530 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 140 DAG size of output: 78 [2020-10-29 04:01:26,166 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 180 DAG size of output: 87 [2020-10-29 04:01:36,396 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 183 DAG size of output: 90 [2020-10-29 04:01:50,041 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 229 DAG size of output: 99 [2020-10-29 04:01:54,986 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 181 DAG size of output: 91 [2020-10-29 04:01:55,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:55,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:55,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:55,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:55,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 04:01:55,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:55,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:55,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:55,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:55,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:55,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:55,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-29 04:01:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:55,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:55,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:55,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:01:55,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:55,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:01:55,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:55,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:55,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 04:01:55,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 04:01:55,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:01:55,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:55,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556637307] [2020-10-29 04:01:55,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:55,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 04:01:55,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303351229] [2020-10-29 04:01:55,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 04:01:55,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 04:01:55,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=356, Unknown=3, NotChecked=0, Total=506 [2020-10-29 04:01:55,891 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 23 states. [2020-10-29 04:02:21,560 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 121 DAG size of output: 114 [2020-10-29 04:02:33,212 WARN L193 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 125 DAG size of output: 118 [2020-10-29 04:02:40,844 WARN L193 SmtUtils]: Spent 6.04 s on a formula simplification. DAG size of input: 127 DAG size of output: 120 [2020-10-29 04:02:50,461 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 04:02:57,096 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 04:03:03,581 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 04:03:10,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:03:10,082 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-10-29 04:03:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 04:03:10,085 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-10-29 04:03:10,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:03:10,086 INFO L225 Difference]: With dead ends: 67 [2020-10-29 04:03:10,086 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 04:03:10,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 82.5s TimeCoverageRelationStatistics Valid=239, Invalid=814, Unknown=3, NotChecked=0, Total=1056 [2020-10-29 04:03:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 04:03:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 04:03:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 04:03:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-29 04:03:10,095 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2020-10-29 04:03:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:03:10,095 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-29 04:03:10,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 04:03:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-29 04:03:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 04:03:10,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:10,096 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:03:10,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 04:03:10,097 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1648044089, now seen corresponding path program 8 times [2020-10-29 04:03:10,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:10,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337994399] [2020-10-29 04:03:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:10,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:10,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:10,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:10,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 04:03:10,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 04:03:10,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-29 04:03:10,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:10,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:10,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 04:03:10,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:03:10,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 04:03:10,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0