/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:57:55,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:57:55,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:57:55,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:57:55,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:57:55,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:57:55,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:57:55,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:57:55,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:57:55,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:57:55,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:57:55,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:57:55,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:57:55,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:57:55,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:57:55,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:57:55,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:57:55,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:57:55,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:57:55,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:57:55,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:57:55,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:57:55,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:57:55,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:57:55,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:57:55,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:57:55,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:57:55,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:57:55,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:57:55,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:57:55,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:57:55,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:57:55,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:57:55,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:57:55,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:57:55,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:57:55,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:57:55,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:57:55,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:57:55,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:57:55,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:57:55,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:57:55,575 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:57:55,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:57:55,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:57:55,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:57:55,579 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:57:55,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:57:55,580 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:57:55,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:57:55,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:57:55,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:57:55,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:57:55,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:57:55,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:57:55,581 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:57:55,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:57:55,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:57:55,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:57:55,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:57:55,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:57:55,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:57:55,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:57:55,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:57:55,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:57:55,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:57:55,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:57:55,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:57:55,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:57:55,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:57:55,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:57:55,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:57:56,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:57:56,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:57:56,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:57:56,074 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:57:56,074 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:57:56,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2020-10-28 14:57:56,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa6f2e449/e72e75cde6b84265b6ef7f98e3eacf11/FLAGb2a53c38b [2020-10-28 14:57:56,782 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:57:56,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2020-10-28 14:57:56,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa6f2e449/e72e75cde6b84265b6ef7f98e3eacf11/FLAGb2a53c38b [2020-10-28 14:57:57,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa6f2e449/e72e75cde6b84265b6ef7f98e3eacf11 [2020-10-28 14:57:57,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:57:57,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:57:57,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:57:57,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:57:57,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:57:57,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:57:57" (1/1) ... [2020-10-28 14:57:57,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f74259e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57, skipping insertion in model container [2020-10-28 14:57:57,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:57:57" (1/1) ... [2020-10-28 14:57:57,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:57:57,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:57:57,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:57:57,315 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:57:57,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:57:57,353 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:57:57,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57 WrapperNode [2020-10-28 14:57:57,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:57:57,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:57:57,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:57:57,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:57:57,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57" (1/1) ... [2020-10-28 14:57:57,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57" (1/1) ... [2020-10-28 14:57:57,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57" (1/1) ... [2020-10-28 14:57:57,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57" (1/1) ... [2020-10-28 14:57:57,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57" (1/1) ... [2020-10-28 14:57:57,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57" (1/1) ... [2020-10-28 14:57:57,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57" (1/1) ... [2020-10-28 14:57:57,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:57:57,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:57:57,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:57:57,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:57:57,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:57:57,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:57:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:57:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:57:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 14:57:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:57:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:57:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:57:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:57:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:57:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:57:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:57:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:57:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 14:57:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:57:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:57:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:57:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:57:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:57:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:57:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:57:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:57:57,728 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:57:57,729 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:57:57,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:57:57 BoogieIcfgContainer [2020-10-28 14:57:57,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:57:57,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:57:57,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:57:57,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:57:57,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:57:57" (1/3) ... [2020-10-28 14:57:57,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f552892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:57:57, skipping insertion in model container [2020-10-28 14:57:57,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:57" (2/3) ... [2020-10-28 14:57:57,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f552892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:57:57, skipping insertion in model container [2020-10-28 14:57:57,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:57:57" (3/3) ... [2020-10-28 14:57:57,740 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2020-10-28 14:57:57,773 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:57:57,781 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:57:57,825 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:57:57,879 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:57:57,880 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:57:57,880 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:57:57,880 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:57:57,880 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:57:57,880 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:57:57,880 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:57:57,880 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:57:57,898 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 14:57:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:57:57,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:57,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:57,911 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:57,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:57,917 INFO L82 PathProgramCache]: Analyzing trace with hash 42548533, now seen corresponding path program 1 times [2020-10-28 14:57:57,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:57,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65362911] [2020-10-28 14:57:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:58,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:58,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:58,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:58,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:57:58,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:58,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-28 14:57:58,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:58,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:58,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:57:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:57:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 14:57:58,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:58,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:58,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:58,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:58,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:58,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:57:58,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:58,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:58,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:58,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:58,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:58,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-10-28 14:57:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:58,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65362911] [2020-10-28 14:57:58,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:57:58,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:57:58,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519952904] [2020-10-28 14:57:58,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:57:58,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:57:58,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:57:58,907 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-28 14:57:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:59,077 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2020-10-28 14:57:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:57:59,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 14:57:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:59,087 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:57:59,087 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:57:59,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:57:59,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:57:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-28 14:57:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:57:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-28 14:57:59,134 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-10-28 14:57:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:59,135 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-28 14:57:59,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:57:59,135 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-28 14:57:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:57:59,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:59,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:59,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:57:59,137 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:59,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:59,137 INFO L82 PathProgramCache]: Analyzing trace with hash -110547841, now seen corresponding path program 1 times [2020-10-28 14:57:59,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:59,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434252141] [2020-10-28 14:57:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:59,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:59,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:59,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:59,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:59,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:57:59,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:57:59,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-10-28 14:57:59,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:59,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:59,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:57:59,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:57:59,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:57:59,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:00,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:00,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:00,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:00,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:00,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:00,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:00,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:00,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:00,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:00,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:00,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:00,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 14:58:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:58:00,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434252141] [2020-10-28 14:58:00,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:58:00,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:58:00,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602298583] [2020-10-28 14:58:00,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:58:00,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:00,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:58:00,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:58:00,071 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-28 14:58:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:00,233 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-28 14:58:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:58:00,233 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-28 14:58:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:00,235 INFO L225 Difference]: With dead ends: 32 [2020-10-28 14:58:00,235 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:58:00,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:58:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:58:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-28 14:58:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:58:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 14:58:00,244 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 17 [2020-10-28 14:58:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:00,244 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 14:58:00,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:58:00,244 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 14:58:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:58:00,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:00,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:00,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:58:00,246 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:00,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1664459521, now seen corresponding path program 1 times [2020-10-28 14:58:00,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:00,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989162621] [2020-10-28 14:58:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:00,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:00,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:00,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:00,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:00,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:58:00,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:58:00,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-28 14:58:00,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:00,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:00,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:58:00,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:00,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:58:00,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:00,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:00,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:00,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:00,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:00,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:00,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:00,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:00,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:00,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:00,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989162621] [2020-10-28 14:58:00,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:00,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:58:00,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649907960] [2020-10-28 14:58:00,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:58:00,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:00,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:58:00,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:58:00,856 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-10-28 14:58:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:00,968 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-10-28 14:58:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:58:00,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 14:58:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:00,971 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:58:00,971 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 14:58:00,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:58:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 14:58:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-10-28 14:58:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:58:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-28 14:58:00,982 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2020-10-28 14:58:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:00,982 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-28 14:58:00,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:58:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-28 14:58:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:58:00,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:00,984 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:00,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:58:00,984 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1213439223, now seen corresponding path program 2 times [2020-10-28 14:58:00,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:00,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020009122] [2020-10-28 14:58:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:01,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:01,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:01,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:01,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:01,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:58:01,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:58:01,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-28 14:58:01,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:01,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:01,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:58:01,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:58:01,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:02,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:02,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:02,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:02,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:02,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:02,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:02,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:02,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:02,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:02,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:02,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:02,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:02,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020009122] [2020-10-28 14:58:02,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:02,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:58:02,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716557486] [2020-10-28 14:58:02,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:58:02,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:02,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:58:02,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:58:02,050 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-28 14:58:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:02,340 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-10-28 14:58:02,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:58:02,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-28 14:58:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:02,341 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:58:02,342 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 14:58:02,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:58:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 14:58:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-28 14:58:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:58:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 14:58:02,350 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2020-10-28 14:58:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:02,351 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 14:58:02,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:58:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 14:58:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:58:02,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:02,352 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:02,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:58:02,352 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash 901983946, now seen corresponding path program 1 times [2020-10-28 14:58:02,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:02,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900163072] [2020-10-28 14:58:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:02,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:02,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:02,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:02,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:58:02,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:02,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-28 14:58:02,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:02,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:02,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:58:02,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:02,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:58:02,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:02,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:02,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:02,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:02,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:02,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:02,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:02,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:02,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:02,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:02,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:02,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:02,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:02,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:58:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:02,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:02,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:02,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:02,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:02,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:58:02,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:02,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:58:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:58:02,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900163072] [2020-10-28 14:58:02,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:02,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:58:02,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770501798] [2020-10-28 14:58:02,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:58:02,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:02,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:58:02,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:58:02,859 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-10-28 14:58:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:02,974 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-10-28 14:58:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:58:02,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-28 14:58:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:02,976 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:58:02,976 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 14:58:02,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:58:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 14:58:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-28 14:58:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 14:58:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-28 14:58:02,986 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2020-10-28 14:58:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:02,986 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-28 14:58:02,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:58:02,987 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-28 14:58:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:58:02,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:02,988 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:02,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:58:02,988 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1606308544, now seen corresponding path program 2 times [2020-10-28 14:58:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:02,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180001025] [2020-10-28 14:58:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:03,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:03,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:03,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:03,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:58:03,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:03,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-28 14:58:03,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:03,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:03,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:58:03,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:03,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:58:03,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:03,875 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-28 14:58:04,050 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-28 14:58:04,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:04,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:04,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:04,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:04,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:04,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:58:04,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:04,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:04,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:04,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:04,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:04,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:04,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 14:58:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:04,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:04,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:04,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:04,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:04,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:58:04,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:04,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:58:04,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:04,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:04,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:04,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180001025] [2020-10-28 14:58:04,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:04,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:58:04,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531774297] [2020-10-28 14:58:04,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:58:04,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:04,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:58:04,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:58:04,158 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2020-10-28 14:58:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:08,903 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-28 14:58:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:58:08,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-28 14:58:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:08,905 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:58:08,905 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:58:08,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:58:08,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:58:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-10-28 14:58:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:58:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 14:58:08,925 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2020-10-28 14:58:08,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:08,925 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 14:58:08,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:58:08,925 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 14:58:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:58:08,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:08,928 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:08,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:58:08,928 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:08,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2053964406, now seen corresponding path program 3 times [2020-10-28 14:58:08,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:08,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584979216] [2020-10-28 14:58:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:08,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:09,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:09,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:09,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:58:09,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:09,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-28 14:58:09,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:09,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:09,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:58:09,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:09,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:58:09,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:10,003 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2020-10-28 14:58:10,261 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-28 14:58:10,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:10,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:10,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:10,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:10,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:10,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:10,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:10,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:10,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:10,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:10,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:10,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-28 14:58:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:10,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:10,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:10,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:10,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:10,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:10,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:10,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:10,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:58:10,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:10,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:10,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:10,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584979216] [2020-10-28 14:58:10,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:10,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:58:10,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401590279] [2020-10-28 14:58:10,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:58:10,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:10,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:58:10,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:58:10,339 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-28 14:58:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:11,086 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-28 14:58:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:58:11,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-28 14:58:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:11,088 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:58:11,088 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:58:11,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:58:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:58:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2020-10-28 14:58:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:58:11,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-28 14:58:11,099 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2020-10-28 14:58:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:11,099 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-28 14:58:11,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:58:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-28 14:58:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:58:11,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:11,101 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:11,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:58:11,101 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:11,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1248573056, now seen corresponding path program 4 times [2020-10-28 14:58:11,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:11,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624819026] [2020-10-28 14:58:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:11,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:11,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:11,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:58:11,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:11,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-28 14:58:11,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:11,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:11,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:58:11,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:11,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:58:11,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:12,148 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-10-28 14:58:12,588 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 33 [2020-10-28 14:58:12,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:12,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:12,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:12,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:12,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:12,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:12,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:12,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:12,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:12,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:12,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:12,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:12,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:58:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:12,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:12,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:12,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:12,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:12,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:12,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:12,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:58:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:12,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:12,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624819026] [2020-10-28 14:58:12,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:12,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:58:12,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990175013] [2020-10-28 14:58:12,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:58:12,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:12,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:58:12,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:58:12,762 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 12 states. [2020-10-28 14:58:13,559 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-28 14:58:13,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:13,736 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2020-10-28 14:58:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:58:13,737 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 14:58:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:13,739 INFO L225 Difference]: With dead ends: 84 [2020-10-28 14:58:13,739 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 14:58:13,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:58:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 14:58:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 40. [2020-10-28 14:58:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:58:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-28 14:58:13,752 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 30 [2020-10-28 14:58:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:13,752 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-28 14:58:13,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:58:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-28 14:58:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:58:13,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:13,754 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:13,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:58:13,754 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:13,754 INFO L82 PathProgramCache]: Analyzing trace with hash 548019274, now seen corresponding path program 5 times [2020-10-28 14:58:13,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:13,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166763639] [2020-10-28 14:58:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:13,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:13,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:14,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:14,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:58:14,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:14,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1039 [2020-10-28 14:58:14,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:14,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:14,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:58:14,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:14,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:58:14,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:15,466 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-28 14:58:15,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:15,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:15,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:15,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:15,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:15,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:15,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:15,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:15,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:15,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 14:58:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:15,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:15,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:15,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:15,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:15,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:15,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:15,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:15,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:58:15,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:15,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:15,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:15,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166763639] [2020-10-28 14:58:15,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:15,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:58:15,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838509775] [2020-10-28 14:58:15,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:58:15,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:15,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:58:15,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:58:15,574 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 13 states. [2020-10-28 14:58:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:16,399 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2020-10-28 14:58:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:58:16,400 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-28 14:58:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:16,401 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:58:16,401 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:58:16,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:58:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:58:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-28 14:58:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:58:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-28 14:58:16,413 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 31 [2020-10-28 14:58:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:16,413 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-28 14:58:16,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:58:16,413 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-28 14:58:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:58:16,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:16,414 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:16,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:58:16,414 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:16,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1073464215, now seen corresponding path program 6 times [2020-10-28 14:58:16,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:16,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767114327] [2020-10-28 14:58:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:16,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:16,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:17,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:17,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:58:17,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:17,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 951 [2020-10-28 14:58:17,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:17,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:58:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:17,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:17,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:17,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:17,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:17,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:17,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:17,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:17,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:17,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:17,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-28 14:58:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:17,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:17,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:17,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:17,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:17,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:58:17,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:17,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:17,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:17,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:58:17,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:17,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:17,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 14:58:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:17,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:17,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:17,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:17,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:17,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:17,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:17,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:58:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:17,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 14:58:17,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767114327] [2020-10-28 14:58:17,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:17,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:58:17,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253475679] [2020-10-28 14:58:17,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:58:17,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:17,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:58:17,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:58:17,522 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 8 states. [2020-10-28 14:58:17,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:17,756 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2020-10-28 14:58:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:58:17,757 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-28 14:58:17,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:17,758 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:58:17,758 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:58:17,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:58:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:58:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2020-10-28 14:58:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:58:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-28 14:58:17,776 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 38 [2020-10-28 14:58:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:17,777 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-28 14:58:17,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:58:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-28 14:58:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:58:17,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:17,779 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:17,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:58:17,779 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:17,780 INFO L82 PathProgramCache]: Analyzing trace with hash -167461023, now seen corresponding path program 7 times [2020-10-28 14:58:17,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:17,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217684438] [2020-10-28 14:58:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:17,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:17,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:18,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:18,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:58:18,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:18,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-28 14:58:18,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:18,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:18,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:58:18,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:18,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:58:18,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:19,385 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-28 14:58:19,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:19,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:19,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:19,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:19,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:19,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:19,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:19,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:19,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:19,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:19,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:19,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:19,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:58:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:19,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:19,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:19,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:19,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:19,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:19,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:19,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:19,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:58:19,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:19,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:19,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:19,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 14:58:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:19,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:19,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:19,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:19,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:19,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:58:19,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:19,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:19,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:58:19,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:19,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:19,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:58:19,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217684438] [2020-10-28 14:58:19,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:19,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:58:19,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594891514] [2020-10-28 14:58:19,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:58:19,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:19,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:58:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:58:19,493 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 13 states. [2020-10-28 14:58:20,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:20,354 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-28 14:58:20,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:58:20,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-28 14:58:20,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:20,355 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:58:20,355 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 14:58:20,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:58:20,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 14:58:20,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2020-10-28 14:58:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 14:58:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-10-28 14:58:20,370 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 39 [2020-10-28 14:58:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:20,371 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-10-28 14:58:20,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:58:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-10-28 14:58:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:58:20,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:20,372 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:20,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:58:20,372 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash 18562263, now seen corresponding path program 8 times [2020-10-28 14:58:20,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:20,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971993532] [2020-10-28 14:58:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:20,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:20,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:21,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:21,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:58:21,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:21,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1340 [2020-10-28 14:58:21,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:21,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:21,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:58:21,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:21,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:58:21,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0