/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:26:47,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:26:47,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:26:47,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:26:47,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:26:47,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:26:47,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:26:47,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:26:47,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:26:47,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:26:47,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:26:47,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:26:47,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:26:47,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:26:47,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:26:47,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:26:47,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:26:47,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:26:47,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:26:47,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:26:47,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:26:47,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:26:47,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:26:47,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:26:47,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:26:47,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:26:47,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:26:47,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:26:47,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:26:47,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:26:47,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:26:47,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:26:47,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:26:47,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:26:47,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:26:47,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:26:47,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:26:47,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:26:47,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:26:47,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:26:47,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:26:47,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:26:47,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:26:47,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:26:47,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:26:47,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:26:47,966 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:26:47,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:26:47,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:26:47,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:26:47,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:26:47,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:26:47,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:26:47,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:26:47,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:26:47,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:26:47,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:26:47,970 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:26:47,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:26:47,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:26:47,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:26:47,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:26:47,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:26:47,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:26:47,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:26:47,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:26:47,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:26:47,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:26:47,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:26:47,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:26:47,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:26:47,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:26:48,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:26:48,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:26:48,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:26:48,424 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:26:48,424 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:26:48,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2020-10-27 20:26:48,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/573e8650d/b826b28bf1454cfa983f87f4538e407f/FLAG43d374bca [2020-10-27 20:26:49,093 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:26:49,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2020-10-27 20:26:49,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/573e8650d/b826b28bf1454cfa983f87f4538e407f/FLAG43d374bca [2020-10-27 20:26:49,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/573e8650d/b826b28bf1454cfa983f87f4538e407f [2020-10-27 20:26:49,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:26:49,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:26:49,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:26:49,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:26:49,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:26:49,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:26:49" (1/1) ... [2020-10-27 20:26:49,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613cb519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49, skipping insertion in model container [2020-10-27 20:26:49,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:26:49" (1/1) ... [2020-10-27 20:26:49,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:26:49,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:26:49,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:26:49,661 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:26:49,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:26:49,696 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:26:49,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49 WrapperNode [2020-10-27 20:26:49,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:26:49,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:26:49,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:26:49,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:26:49,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49" (1/1) ... [2020-10-27 20:26:49,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49" (1/1) ... [2020-10-27 20:26:49,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49" (1/1) ... [2020-10-27 20:26:49,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49" (1/1) ... [2020-10-27 20:26:49,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49" (1/1) ... [2020-10-27 20:26:49,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49" (1/1) ... [2020-10-27 20:26:49,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49" (1/1) ... [2020-10-27 20:26:49,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:26:49,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:26:49,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:26:49,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:26:49,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:26:49,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:26:49,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:26:49,820 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:26:49,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:26:49,820 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:26:49,821 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:26:49,821 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:26:49,821 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:26:49,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:26:49,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:26:49,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:26:49,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:26:49,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:26:49,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:26:49,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:26:49,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:26:49,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:26:50,042 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:26:50,043 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:26:50,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:26:50 BoogieIcfgContainer [2020-10-27 20:26:50,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:26:50,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:26:50,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:26:50,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:26:50,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:26:49" (1/3) ... [2020-10-27 20:26:50,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0ec294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:26:50, skipping insertion in model container [2020-10-27 20:26:50,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:26:49" (2/3) ... [2020-10-27 20:26:50,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0ec294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:26:50, skipping insertion in model container [2020-10-27 20:26:50,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:26:50" (3/3) ... [2020-10-27 20:26:50,054 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-2.c [2020-10-27 20:26:50,068 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:26:50,073 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:26:50,092 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:26:50,165 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:26:50,165 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:26:50,166 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:26:50,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:26:50,166 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:26:50,166 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:26:50,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:26:50,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:26:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-27 20:26:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:26:50,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:50,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:50,232 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:50,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:50,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1347720711, now seen corresponding path program 1 times [2020-10-27 20:26:50,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:50,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512705774] [2020-10-27 20:26:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:50,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:50,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:50,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:26:50,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:50,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 20:26:50,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:50,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:50,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:26:50,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:50,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:26:50,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:50,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:50,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:50,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:50,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:50,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 20:26:50,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:50,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:50,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:50,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:50,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:50,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512705774] [2020-10-27 20:26:50,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:26:50,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:26:50,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958822109] [2020-10-27 20:26:50,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:26:50,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:50,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:26:50,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:26:50,772 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-27 20:26:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:50,840 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-27 20:26:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:26:50,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:26:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:50,850 INFO L225 Difference]: With dead ends: 35 [2020-10-27 20:26:50,851 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 20:26:50,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:26:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 20:26:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 20:26:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 20:26:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-27 20:26:50,900 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-27 20:26:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:50,901 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-27 20:26:50,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:26:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-27 20:26:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:26:50,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:50,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:50,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:26:50,903 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:50,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:50,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1061429201, now seen corresponding path program 1 times [2020-10-27 20:26:50,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:50,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973244008] [2020-10-27 20:26:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:50,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:51,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:51,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:26:51,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:51,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 20:26:51,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:51,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:26:51,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:26:51,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:26:51,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:51,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:51,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:51,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:51,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:51,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:51,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 20:26:51,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:51,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:51,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:51,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:51,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:51,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973244008] [2020-10-27 20:26:51,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:26:51,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:26:51,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790244950] [2020-10-27 20:26:51,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:26:51,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:51,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:26:51,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:26:51,200 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-27 20:26:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:51,291 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-27 20:26:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:26:51,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 20:26:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:51,293 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:26:51,293 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:26:51,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:26:51,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:26:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:26:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:26:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 20:26:51,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 20:26:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:51,303 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 20:26:51,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:26:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 20:26:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:26:51,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:51,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:51,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:26:51,305 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:51,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1101414388, now seen corresponding path program 1 times [2020-10-27 20:26:51,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:51,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379406878] [2020-10-27 20:26:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:51,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:51,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:51,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:26:51,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:51,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 20:26:51,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:51,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:26:51,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:51,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:26:51,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:51,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:51,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:51,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:51,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:51,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:51,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:26:51,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:51,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:51,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:51,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379406878] [2020-10-27 20:26:51,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:26:51,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:26:51,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978606529] [2020-10-27 20:26:51,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:26:51,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:51,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:26:51,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:26:51,505 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 20:26:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:51,592 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 20:26:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:26:51,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 20:26:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:51,594 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:26:51,594 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:26:51,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:26:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:26:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 20:26:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:26:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 20:26:51,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-27 20:26:51,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:51,604 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 20:26:51,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:26:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 20:26:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:26:51,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:51,605 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:51,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:26:51,605 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:51,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:51,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1647486503, now seen corresponding path program 1 times [2020-10-27 20:26:51,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:51,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820924163] [2020-10-27 20:26:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:51,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:51,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:51,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:51,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:26:51,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:51,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 20:26:51,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:51,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:26:51,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:51,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:26:51,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:26:52,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:52,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:52,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:52,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:52,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:52,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:26:52,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:52,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:52,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820924163] [2020-10-27 20:26:52,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:52,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:26:52,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313897299] [2020-10-27 20:26:52,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:26:52,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:52,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:26:52,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:26:52,061 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 20:26:52,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:52,199 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-27 20:26:52,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:26:52,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 20:26:52,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:52,202 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:26:52,202 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 20:26:52,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:26:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 20:26:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-27 20:26:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:26:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 20:26:52,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-27 20:26:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:52,211 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 20:26:52,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:26:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 20:26:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:26:52,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:52,213 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:52,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:26:52,213 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:52,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:52,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1936355714, now seen corresponding path program 2 times [2020-10-27 20:26:52,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:52,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573826554] [2020-10-27 20:26:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:52,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:52,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:52,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:52,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:26:52,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:52,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-27 20:26:52,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:52,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:26:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:26:52,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:52,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:52,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:52,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:52,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:52,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:52,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:26:52,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:52,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:52,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:52,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:52,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:52,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573826554] [2020-10-27 20:26:52,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:52,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:26:52,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478770871] [2020-10-27 20:26:52,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:26:52,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:52,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:26:52,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:26:52,680 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-10-27 20:26:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:53,076 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-27 20:26:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:26:53,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 20:26:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:53,078 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:26:53,078 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:26:53,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:26:53,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:26:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-27 20:26:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:26:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-27 20:26:53,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-10-27 20:26:53,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:53,088 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-27 20:26:53,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:26:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-27 20:26:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:26:53,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:53,089 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:53,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:26:53,090 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:53,091 INFO L82 PathProgramCache]: Analyzing trace with hash -366793245, now seen corresponding path program 3 times [2020-10-27 20:26:53,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:53,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025408705] [2020-10-27 20:26:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:53,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:53,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:53,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:53,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:26:53,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:53,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-27 20:26:53,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:53,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:26:53,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:26:53,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:26:53,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:53,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:53,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:53,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:53,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:53,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:26:53,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:53,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:53,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:53,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:53,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:53,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025408705] [2020-10-27 20:26:53,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:53,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:26:53,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136558708] [2020-10-27 20:26:53,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:26:53,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:53,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:26:53,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:26:53,427 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 7 states. [2020-10-27 20:26:53,893 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-27 20:26:57,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:26:57,059 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-10-27 20:26:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:26:57,060 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 20:26:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:26:57,061 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:26:57,061 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 20:26:57,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:26:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 20:26:57,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-10-27 20:26:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:26:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-27 20:26:57,076 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 20 [2020-10-27 20:26:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:26:57,077 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-27 20:26:57,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:26:57,077 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-27 20:26:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:26:57,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:26:57,078 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:26:57,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:26:57,079 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:26:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:26:57,080 INFO L82 PathProgramCache]: Analyzing trace with hash 449218568, now seen corresponding path program 4 times [2020-10-27 20:26:57,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:26:57,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362753770] [2020-10-27 20:26:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:26:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:57,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:57,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:26:57,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:26:57,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-27 20:26:57,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:26:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:26:57,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:26:57,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:26:57,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:26:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:26:57,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:26:57,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:26:57,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:26:57,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:26:57,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:26:57,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:26:57,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:26:57,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:26:57,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:26:57,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:26:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:26:57,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362753770] [2020-10-27 20:26:57,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:26:57,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:26:57,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69836608] [2020-10-27 20:26:57,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:26:57,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:26:57,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:26:57,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:26:57,957 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2020-10-27 20:26:58,349 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-27 20:27:00,576 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-27 20:27:02,655 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-27 20:27:02,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:02,877 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-27 20:27:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:27:02,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 20:27:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:02,878 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:27:02,878 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:27:02,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:27:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:27:02,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-10-27 20:27:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:27:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-10-27 20:27:02,888 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 22 [2020-10-27 20:27:02,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:02,888 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-10-27 20:27:02,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:27:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-10-27 20:27:02,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:27:02,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:02,889 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:02,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:27:02,890 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:02,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:02,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1342444307, now seen corresponding path program 5 times [2020-10-27 20:27:02,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:02,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172293914] [2020-10-27 20:27:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:02,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:02,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:03,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:03,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:27:03,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:03,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-27 20:27:03,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:27:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:27:03,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:03,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:03,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:03,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:03,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:03,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:03,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:27:03,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:03,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:03,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:03,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:03,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:03,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172293914] [2020-10-27 20:27:03,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:03,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:27:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030135134] [2020-10-27 20:27:03,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:27:03,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:03,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:27:03,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:27:03,412 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2020-10-27 20:27:07,483 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 20:27:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:13,411 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-27 20:27:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:27:13,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 20:27:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:13,415 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:27:13,415 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:27:13,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=80, Invalid=159, Unknown=1, NotChecked=0, Total=240 [2020-10-27 20:27:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:27:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 20:27:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:27:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-27 20:27:13,424 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 24 [2020-10-27 20:27:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:13,424 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-27 20:27:13,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:27:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-27 20:27:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:27:13,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:13,426 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:13,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:27:13,426 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash -848581486, now seen corresponding path program 6 times [2020-10-27 20:27:13,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:13,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076868802] [2020-10-27 20:27:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:13,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:13,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:13,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:13,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:27:13,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:13,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-27 20:27:13,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:13,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:27:13,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:13,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:27:13,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:16,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:16,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:16,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:16,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:16,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:16,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:16,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:16,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:16,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:16,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:16,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:16,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076868802] [2020-10-27 20:27:16,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:16,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:27:16,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724762036] [2020-10-27 20:27:16,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:27:16,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:16,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:27:16,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2020-10-27 20:27:16,189 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 10 states. [2020-10-27 20:27:20,639 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 20:27:21,110 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-27 20:27:21,301 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 20:27:21,521 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-27 20:27:21,755 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-27 20:27:28,151 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 56 [2020-10-27 20:27:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:33,277 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-27 20:27:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:27:33,278 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 20:27:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:33,279 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:27:33,280 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 20:27:33,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=122, Invalid=255, Unknown=3, NotChecked=0, Total=380 [2020-10-27 20:27:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 20:27:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-10-27 20:27:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:27:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-10-27 20:27:33,290 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 26 [2020-10-27 20:27:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:33,290 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-27 20:27:33,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:27:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-10-27 20:27:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:27:33,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:33,291 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:33,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:27:33,292 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:33,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1307186935, now seen corresponding path program 7 times [2020-10-27 20:27:33,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:33,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121848078] [2020-10-27 20:27:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:33,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:33,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:33,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:33,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:27:33,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:33,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-27 20:27:33,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:27:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:27:33,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:33,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:33,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:33,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:33,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:33,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:33,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:33,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:33,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:33,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:33,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:33,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:33,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121848078] [2020-10-27 20:27:33,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:33,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:27:33,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764867907] [2020-10-27 20:27:33,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:27:33,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:33,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:27:33,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:27:33,967 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 11 states. [2020-10-27 20:27:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:34,664 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2020-10-27 20:27:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:27:34,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 20:27:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:34,666 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:27:34,666 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:27:34,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:27:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:27:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 20:27:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:27:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 20:27:34,678 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-10-27 20:27:34,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:34,678 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 20:27:34,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:27:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 20:27:34,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:27:34,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:34,679 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:34,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:27:34,680 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:34,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1468564452, now seen corresponding path program 8 times [2020-10-27 20:27:34,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:34,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441503161] [2020-10-27 20:27:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:34,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:35,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:35,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:27:35,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:35,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-27 20:27:35,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:35,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:27:35,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:35,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:27:35,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:35,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:35,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:35,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:35,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:35,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:35,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:27:35,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:35,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:35,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:35,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:35,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:35,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441503161] [2020-10-27 20:27:35,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:35,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:27:35,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462136688] [2020-10-27 20:27:35,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:27:35,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:35,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:27:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:27:35,674 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 12 states. [2020-10-27 20:27:42,489 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-27 20:27:43,384 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-27 20:27:46,904 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-27 20:27:47,132 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-27 20:27:47,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:47,483 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-27 20:27:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:27:47,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 20:27:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:47,485 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:27:47,485 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 20:27:47,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=131, Invalid=287, Unknown=2, NotChecked=0, Total=420 [2020-10-27 20:27:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 20:27:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 20:27:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:27:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-27 20:27:47,497 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2020-10-27 20:27:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:47,497 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-27 20:27:47,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:27:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-27 20:27:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:27:47,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:47,498 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:47,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:27:47,499 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:47,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1790956543, now seen corresponding path program 9 times [2020-10-27 20:27:47,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:47,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783023469] [2020-10-27 20:27:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:47,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:47,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:47,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:27:47,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:47,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-27 20:27:47,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:27:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:27:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:27:47,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:48,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:48,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:48,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:48,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:48,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:48,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:48,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:48,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783023469] [2020-10-27 20:27:48,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:48,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:27:48,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989231204] [2020-10-27 20:27:48,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:27:48,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:48,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:27:48,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:27:48,398 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 13 states. [2020-10-27 20:27:51,203 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-10-27 20:27:51,665 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-27 20:27:57,021 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-27 20:28:01,472 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-27 20:28:04,163 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 20:28:07,624 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 56 [2020-10-27 20:28:12,472 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-10-27 20:28:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:14,401 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-27 20:28:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:28:14,402 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 20:28:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:14,403 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:28:14,403 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:28:14,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:28:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:28:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-27 20:28:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 20:28:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-27 20:28:14,413 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 32 [2020-10-27 20:28:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:14,414 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-27 20:28:14,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:28:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-27 20:28:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:28:14,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:14,415 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:14,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:28:14,415 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:14,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1922856614, now seen corresponding path program 10 times [2020-10-27 20:28:14,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:14,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068741388] [2020-10-27 20:28:14,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:14,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:14,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:15,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:15,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:28:15,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:28:15,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-27 20:28:15,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:28:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:28:15,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:28:15,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:15,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:15,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:15,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:15,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:15,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:28:15,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:15,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:15,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:28:15,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068741388] [2020-10-27 20:28:15,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:15,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:28:15,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618508325] [2020-10-27 20:28:15,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:28:15,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:15,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:28:15,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:28:15,498 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 14 states. [2020-10-27 20:28:19,330 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-10-27 20:28:23,910 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2020-10-27 20:28:29,970 WARN L193 SmtUtils]: Spent 5.48 s on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-27 20:28:32,408 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-27 20:28:37,369 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-27 20:28:39,959 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 20:28:45,711 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-27 20:28:46,991 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2020-10-27 20:28:52,304 WARN L193 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 98 DAG size of output: 49 [2020-10-27 20:28:57,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:57,674 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2020-10-27 20:28:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:28:57,675 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 20:28:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:57,676 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:28:57,676 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:28:57,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=220, Invalid=479, Unknown=3, NotChecked=0, Total=702 [2020-10-27 20:28:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:28:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-10-27 20:28:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:28:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-27 20:28:57,689 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 34 [2020-10-27 20:28:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:57,690 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-27 20:28:57,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:28:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-27 20:28:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:28:57,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:57,691 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:57,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:28:57,691 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:57,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1779477515, now seen corresponding path program 11 times [2020-10-27 20:28:57,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:57,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021707541] [2020-10-27 20:28:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:57,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:57,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:58,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:58,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:28:58,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:28:58,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-27 20:28:58,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:58,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:28:58,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:28:58,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:28:58,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:00,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:00,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:00,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:00,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:00,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:00,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:00,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:00,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:00,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:00,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:00,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:00,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021707541] [2020-10-27 20:29:00,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:00,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:29:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103051105] [2020-10-27 20:29:00,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:29:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:29:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2020-10-27 20:29:00,879 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 15 states. [2020-10-27 20:29:04,102 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-27 20:29:10,993 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-27 20:29:12,389 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-27 20:29:13,194 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-27 20:29:16,280 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2020-10-27 20:29:18,670 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-27 20:29:21,874 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-27 20:29:26,441 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-27 20:29:34,432 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-27 20:29:40,031 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-10-27 20:29:47,940 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2020-10-27 20:29:55,793 WARN L193 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 110 DAG size of output: 47 [2020-10-27 20:30:00,669 WARN L193 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2020-10-27 20:30:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:03,802 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-27 20:30:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:30:03,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 20:30:03,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:03,804 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:30:03,804 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:30:03,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=441, Invalid=959, Unknown=6, NotChecked=0, Total=1406 [2020-10-27 20:30:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:30:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-27 20:30:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:30:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-27 20:30:03,828 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2020-10-27 20:30:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:03,829 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-27 20:30:03,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:30:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-27 20:30:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:30:03,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:03,834 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:03,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:30:03,835 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:03,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1431116848, now seen corresponding path program 12 times [2020-10-27 20:30:03,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:03,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65966585] [2020-10-27 20:30:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:03,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:03,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:04,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:30:04,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:30:04,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-27 20:30:04,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:30:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:30:04,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:05,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:05,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:05,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:05,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:05,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:05,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:30:05,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:05,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 25 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:05,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65966585] [2020-10-27 20:30:05,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:05,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:30:05,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629628222] [2020-10-27 20:30:05,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:30:05,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:05,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:30:05,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:30:05,095 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 16 states. [2020-10-27 20:30:09,988 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2020-10-27 20:30:12,007 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) 10000012)) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) 10000002)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 17)) 4294967296)) 10000016)) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 19)) 4294967296)) 10000018)) (= |c_old(#valid)| |c_#valid|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 15)) 4294967296)) 10000014)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)) 10000004)) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)) 10000010)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)) 10000008)) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)) 10000006)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 23)) 4294967296)) 10000022)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 21)) 4294967296)) 10000020))) is different from false [2020-10-27 20:30:15,248 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 17 [2020-10-27 20:30:17,410 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) 10000012)) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 17)) 4294967296)) 10000016)) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 19)) 4294967296)) 10000018)) (= |c_old(#valid)| |c_#valid|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 15)) 4294967296)) 10000014)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)) 10000004)) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)) 10000010)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)) 10000008)) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)) 10000006)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 23)) 4294967296)) 10000022)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 21)) 4294967296)) 10000020))) is different from false [2020-10-27 20:30:20,876 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-27 20:30:23,995 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-27 20:30:25,665 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2020-10-27 20:30:32,079 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-27 20:30:35,040 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-27 20:30:36,374 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-27 20:30:39,180 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) 10000012)) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) 10000002)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 17)) 4294967296)) 10000016)) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 19)) 4294967296)) 10000018)) (= |c_old(#valid)| |c_#valid|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 15)) 4294967296)) 10000014)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)) 10000004)) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)) 10000010)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)) 10000000)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)) 10000008)) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)) 10000006)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 23)) 4294967296)) 10000022)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 21)) 4294967296)) 10000020))) is different from false [2020-10-27 20:30:40,934 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-27 20:30:41,961 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 17 [2020-10-27 20:30:43,565 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-27 20:30:46,608 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 17 [2020-10-27 20:30:49,827 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 47 [2020-10-27 20:30:57,178 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 47 [2020-10-27 20:30:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:57,252 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-27 20:30:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:30:57,252 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 20:30:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:57,254 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:30:57,254 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 20:30:57,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=334, Invalid=793, Unknown=7, NotChecked=198, Total=1332 [2020-10-27 20:30:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 20:30:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-27 20:30:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:30:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-27 20:30:57,266 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 38 [2020-10-27 20:30:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:57,266 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-27 20:30:57,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:30:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-27 20:30:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:30:57,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:57,267 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:57,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:30:57,268 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:57,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1663964949, now seen corresponding path program 13 times [2020-10-27 20:30:57,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:57,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685703947] [2020-10-27 20:30:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:57,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:58,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:58,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 20:30:58,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:30:58,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 714 [2020-10-27 20:30:58,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:58,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:30:58,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:30:58,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:30:58,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:00,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:00,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:00,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:00,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:00,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:00,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:31:00,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:00,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:00,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 167 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:31:00,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685703947] [2020-10-27 20:31:00,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:00,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:31:00,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545792925] [2020-10-27 20:31:00,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:31:00,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:00,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:31:00,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2020-10-27 20:31:00,864 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 17 states. [2020-10-27 20:31:10,709 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-27 20:31:13,864 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2020-10-27 20:31:17,193 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 110 DAG size of output: 47 [2020-10-27 20:31:20,586 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 47