/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:35:36,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:35:36,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:35:36,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:35:36,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:35:36,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:35:36,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:35:36,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:35:36,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:35:36,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:35:36,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:35:36,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:35:36,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:35:36,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:35:36,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:35:36,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:35:36,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:35:36,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:35:37,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:35:37,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:35:37,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:35:37,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:35:37,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:35:37,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:35:37,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:35:37,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:35:37,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:35:37,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:35:37,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:35:37,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:35:37,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:35:37,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:35:37,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:35:37,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:35:37,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:35:37,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:35:37,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:35:37,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:35:37,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:35:37,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:35:37,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:35:37,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:35:37,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:35:37,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:35:37,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:35:37,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:35:37,085 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:35:37,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:35:37,085 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:35:37,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:35:37,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:35:37,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:35:37,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:35:37,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:35:37,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:35:37,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:35:37,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:35:37,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:35:37,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:35:37,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:35:37,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:35:37,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:35:37,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:35:37,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:35:37,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:35:37,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:35:37,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:35:37,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:35:37,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:35:37,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:35:37,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:35:37,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:35:37,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:35:37,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:35:37,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:35:37,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:35:37,588 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:35:37,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2020-10-28 08:35:37,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0b77542c/55c590dfb4e946388f690d99b4db0e84/FLAG97f0bac7c [2020-10-28 08:35:38,302 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:35:38,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2020-10-28 08:35:38,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0b77542c/55c590dfb4e946388f690d99b4db0e84/FLAG97f0bac7c [2020-10-28 08:35:38,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0b77542c/55c590dfb4e946388f690d99b4db0e84 [2020-10-28 08:35:38,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:35:38,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:35:38,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:35:38,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:35:38,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:35:38,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18477486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38, skipping insertion in model container [2020-10-28 08:35:38,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:35:38,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:35:38,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:35:38,896 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:35:38,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:35:38,933 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:35:38,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38 WrapperNode [2020-10-28 08:35:38,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:35:38,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:35:38,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:35:38,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:35:38,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38" (1/1) ... [2020-10-28 08:35:38,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:35:38,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:35:38,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:35:38,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:35:38,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:35:39,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:35:39,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:35:39,049 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:35:39,050 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 08:35:39,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:35:39,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:35:39,050 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:35:39,051 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:35:39,051 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:35:39,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:35:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 08:35:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:35:39,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:35:39,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:35:39,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:35:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:35:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:35:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:35:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:35:39,467 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:35:39,468 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 08:35:39,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:35:39 BoogieIcfgContainer [2020-10-28 08:35:39,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:35:39,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:35:39,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:35:39,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:35:39,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:35:38" (1/3) ... [2020-10-28 08:35:39,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c05d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:35:39, skipping insertion in model container [2020-10-28 08:35:39,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:35:38" (2/3) ... [2020-10-28 08:35:39,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c05d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:35:39, skipping insertion in model container [2020-10-28 08:35:39,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:35:39" (3/3) ... [2020-10-28 08:35:39,480 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.c [2020-10-28 08:35:39,494 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:35:39,501 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:35:39,526 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:35:39,574 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:35:39,574 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:35:39,574 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:35:39,575 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:35:39,575 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:35:39,575 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:35:39,575 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:35:39,576 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:35:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-28 08:35:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 08:35:39,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:39,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:39,615 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash 661726964, now seen corresponding path program 1 times [2020-10-28 08:35:39,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:39,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603191641] [2020-10-28 08:35:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:39,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:40,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:40,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:40,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:40,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:40,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 08:35:40,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:35:40,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-28 08:35:40,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:40,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:40,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:40,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:35:40,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:40,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:35:40,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:40,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:40,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:40,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:40,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:40,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 08:35:40,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:40,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:40,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:35:40,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:40,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:35:40,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:40,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603191641] [2020-10-28 08:35:40,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:35:40,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:35:40,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924566612] [2020-10-28 08:35:40,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:35:40,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:40,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:35:40,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:35:40,825 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-28 08:35:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:40,953 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-28 08:35:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:35:40,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-28 08:35:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:40,970 INFO L225 Difference]: With dead ends: 49 [2020-10-28 08:35:40,970 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 08:35:40,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:35:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 08:35:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 08:35:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 08:35:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-28 08:35:41,046 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-10-28 08:35:41,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:41,047 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-28 08:35:41,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:35:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-28 08:35:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 08:35:41,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:41,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:41,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:35:41,050 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:41,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1376975360, now seen corresponding path program 1 times [2020-10-28 08:35:41,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:41,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111052425] [2020-10-28 08:35:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:41,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:41,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:41,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:41,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:41,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:41,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 08:35:41,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:35:41,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-28 08:35:41,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:41,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:41,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:35:41,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:41,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:35:41,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:35:41,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:41,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:41,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:41,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:41,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:41,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 08:35:41,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:41,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:41,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:41,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:41,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 08:35:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:35:41,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111052425] [2020-10-28 08:35:41,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:35:41,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:35:41,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903700651] [2020-10-28 08:35:41,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:35:41,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:35:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:35:41,911 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-10-28 08:35:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:42,104 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-28 08:35:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:35:42,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 08:35:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:42,106 INFO L225 Difference]: With dead ends: 38 [2020-10-28 08:35:42,106 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 08:35:42,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:35:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 08:35:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-28 08:35:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 08:35:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 08:35:42,127 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2020-10-28 08:35:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:42,128 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 08:35:42,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:35:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 08:35:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 08:35:42,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:42,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:42,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:35:42,130 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash 66704614, now seen corresponding path program 1 times [2020-10-28 08:35:42,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:42,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925443194] [2020-10-28 08:35:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:42,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:42,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:42,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:42,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:42,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:43,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:43,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:44,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:45,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:45,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 08:35:45,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:35:45,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3271 [2020-10-28 08:35:45,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:45,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:35:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:35:45,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:45,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:45,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:45,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:45,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:45,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:45,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 08:35:45,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:45,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:45,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:45,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:45,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:45,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:35:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 08:35:45,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925443194] [2020-10-28 08:35:45,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:45,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:35:45,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303768756] [2020-10-28 08:35:45,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:35:45,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:45,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:35:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:35:45,566 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-28 08:35:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:45,804 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-28 08:35:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:35:45,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 08:35:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:45,807 INFO L225 Difference]: With dead ends: 46 [2020-10-28 08:35:45,807 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 08:35:45,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:35:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 08:35:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-28 08:35:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 08:35:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-28 08:35:45,823 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-10-28 08:35:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:45,824 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-28 08:35:45,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:35:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-28 08:35:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 08:35:45,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:45,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:45,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:35:45,827 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:45,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:45,828 INFO L82 PathProgramCache]: Analyzing trace with hash -405168308, now seen corresponding path program 2 times [2020-10-28 08:35:45,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:45,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248798051] [2020-10-28 08:35:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:45,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:45,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:46,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:46,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:47,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:47,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:48,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:48,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:49,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:49,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:49,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:50,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:50,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:50,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:50,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:50,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 08:35:50,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 08:35:50,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:35:50,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:50,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:50,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:35:50,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:50,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:35:50,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:50,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:50,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:50,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:50,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:50,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:50,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 08:35:50,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:50,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:50,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:50,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:50,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:50,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 08:35:50,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248798051] [2020-10-28 08:35:50,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:50,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:35:50,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121908148] [2020-10-28 08:35:50,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:35:50,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:50,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:35:50,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:35:50,955 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-10-28 08:35:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:51,143 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-28 08:35:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:35:51,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-28 08:35:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:51,144 INFO L225 Difference]: With dead ends: 56 [2020-10-28 08:35:51,145 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 08:35:51,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:35:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 08:35:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-28 08:35:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 08:35:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-28 08:35:51,153 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-10-28 08:35:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:51,154 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-28 08:35:51,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:35:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-28 08:35:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 08:35:51,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:51,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:51,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:35:51,156 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:51,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1809201870, now seen corresponding path program 3 times [2020-10-28 08:35:51,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:51,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321271286] [2020-10-28 08:35:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:51,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:51,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:51,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:51,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:52,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:52,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:53,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:53,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:54,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:54,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:55,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:55,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:56,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:56,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 08:35:56,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 08:35:56,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:35:56,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:56,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:56,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:35:56,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:35:56,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:35:56,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:56,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:35:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:56,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:56,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:35:56,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:35:56,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:35:56,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 08:35:56,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:35:56,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:35:56,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:35:56,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:35:56,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:35:56,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:35:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 08:35:56,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321271286] [2020-10-28 08:35:56,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:35:56,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:35:56,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481608612] [2020-10-28 08:35:56,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:35:56,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:35:56,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:35:56,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:35:56,334 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 8 states. [2020-10-28 08:35:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:35:56,570 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-28 08:35:56,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:35:56,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 08:35:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:35:56,571 INFO L225 Difference]: With dead ends: 66 [2020-10-28 08:35:56,572 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 08:35:56,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:35:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 08:35:56,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-28 08:35:56,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 08:35:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-28 08:35:56,581 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2020-10-28 08:35:56,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:35:56,581 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-28 08:35:56,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:35:56,581 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-28 08:35:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 08:35:56,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:35:56,583 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:35:56,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:35:56,586 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:35:56,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:35:56,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1711298920, now seen corresponding path program 4 times [2020-10-28 08:35:56,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:35:56,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544796801] [2020-10-28 08:35:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:35:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:35:56,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:56,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:35:56,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:01,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:01,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 08:36:01,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:01,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:36:01,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:01,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:36:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:36:01,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:01,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:01,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:01,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:01,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:01,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:01,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:36:01,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:01,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:01,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:01,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:01,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:01,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 08:36:01,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544796801] [2020-10-28 08:36:01,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:01,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:36:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62319000] [2020-10-28 08:36:01,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:36:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:36:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:36:01,763 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2020-10-28 08:36:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:02,034 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-28 08:36:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:36:02,035 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-28 08:36:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:02,036 INFO L225 Difference]: With dead ends: 76 [2020-10-28 08:36:02,036 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 08:36:02,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:36:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 08:36:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-28 08:36:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 08:36:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-28 08:36:02,045 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 40 [2020-10-28 08:36:02,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:02,046 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-28 08:36:02,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:36:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-28 08:36:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 08:36:02,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:02,047 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:02,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:36:02,048 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:02,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1494703234, now seen corresponding path program 5 times [2020-10-28 08:36:02,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:02,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456912788] [2020-10-28 08:36:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:02,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:02,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:02,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:07,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:07,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 08:36:07,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:07,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:36:07,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:07,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:07,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:36:07,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:07,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:36:07,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:07,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:07,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:07,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:07,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:07,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:07,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 08:36:07,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:07,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:07,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:07,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:07,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:07,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:36:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 08:36:07,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456912788] [2020-10-28 08:36:07,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:07,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:36:07,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872077085] [2020-10-28 08:36:07,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:36:07,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:07,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:36:07,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:36:07,266 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 10 states. [2020-10-28 08:36:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:07,603 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-28 08:36:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:36:07,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-28 08:36:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:07,604 INFO L225 Difference]: With dead ends: 86 [2020-10-28 08:36:07,605 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 08:36:07,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:36:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 08:36:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-28 08:36:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 08:36:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-28 08:36:07,614 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 46 [2020-10-28 08:36:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:07,615 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-28 08:36:07,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:36:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-28 08:36:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 08:36:07,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:07,616 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:07,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:36:07,617 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash -890627100, now seen corresponding path program 6 times [2020-10-28 08:36:07,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:07,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359915931] [2020-10-28 08:36:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:07,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:07,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:07,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:12,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:12,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 08:36:12,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:12,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:36:12,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:12,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:12,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:36:12,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:12,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:36:12,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:12,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:12,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:12,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:12,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:12,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:12,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:36:12,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:12,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:12,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:12,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:12,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:12,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 08:36:12,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359915931] [2020-10-28 08:36:12,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:12,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:36:12,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184032945] [2020-10-28 08:36:12,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:36:12,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:36:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:36:12,826 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 11 states. [2020-10-28 08:36:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:13,226 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-28 08:36:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:36:13,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-28 08:36:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:13,228 INFO L225 Difference]: With dead ends: 96 [2020-10-28 08:36:13,229 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 08:36:13,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:36:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 08:36:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-28 08:36:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 08:36:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-28 08:36:13,238 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-10-28 08:36:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:13,239 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-28 08:36:13,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:36:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-28 08:36:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 08:36:13,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:13,240 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:13,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:36:13,240 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1048670154, now seen corresponding path program 7 times [2020-10-28 08:36:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:13,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049267000] [2020-10-28 08:36:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:13,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:13,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:13,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:18,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:18,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 08:36:18,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:18,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:36:18,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:18,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:36:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:36:18,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:18,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:18,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:18,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:18,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:18,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:18,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 08:36:18,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:18,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:18,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:18,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:18,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:18,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-28 08:36:18,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049267000] [2020-10-28 08:36:18,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:18,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:36:18,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824261860] [2020-10-28 08:36:18,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:36:18,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:18,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:36:18,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:36:18,457 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 12 states. [2020-10-28 08:36:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:18,881 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-28 08:36:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:36:18,881 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-28 08:36:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:18,882 INFO L225 Difference]: With dead ends: 106 [2020-10-28 08:36:18,882 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 08:36:18,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:36:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 08:36:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-28 08:36:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 08:36:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-28 08:36:18,896 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2020-10-28 08:36:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:18,901 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-28 08:36:18,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:36:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-28 08:36:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 08:36:18,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:18,903 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:18,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:36:18,903 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:18,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:18,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1465647312, now seen corresponding path program 8 times [2020-10-28 08:36:18,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:18,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200006287] [2020-10-28 08:36:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:18,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:18,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:19,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:23,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:23,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 08:36:23,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:23,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:36:23,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:23,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:23,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:36:23,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:23,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 08:36:23,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:24,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:24,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:24,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:24,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:24,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:24,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:36:24,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:24,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:24,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:24,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:24,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:24,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-28 08:36:24,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200006287] [2020-10-28 08:36:24,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:24,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:36:24,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371353505] [2020-10-28 08:36:24,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:36:24,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:24,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:36:24,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:36:24,145 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 13 states. [2020-10-28 08:36:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:24,573 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-28 08:36:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:36:24,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2020-10-28 08:36:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:24,575 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:36:24,575 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 08:36:24,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:36:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 08:36:24,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-28 08:36:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 08:36:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-28 08:36:24,596 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 64 [2020-10-28 08:36:24,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:24,597 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-28 08:36:24,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:36:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-28 08:36:24,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 08:36:24,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:24,601 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:24,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:36:24,602 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:24,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash -457233898, now seen corresponding path program 9 times [2020-10-28 08:36:24,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:24,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953756166] [2020-10-28 08:36:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:24,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:24,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:29,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:29,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 08:36:29,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:29,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:36:29,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:29,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:29,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:36:29,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:29,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 08:36:29,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:29,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:29,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:29,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:29,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:29,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:29,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:36:29,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:29,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:29,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:29,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-28 08:36:29,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953756166] [2020-10-28 08:36:29,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:29,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:36:29,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657141218] [2020-10-28 08:36:29,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:36:29,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:29,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:36:29,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:36:29,879 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 14 states. [2020-10-28 08:36:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:30,368 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-28 08:36:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:36:30,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-10-28 08:36:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:30,369 INFO L225 Difference]: With dead ends: 126 [2020-10-28 08:36:30,369 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 08:36:30,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:36:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 08:36:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-28 08:36:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 08:36:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-28 08:36:30,391 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 70 [2020-10-28 08:36:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:30,391 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-28 08:36:30,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:36:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-28 08:36:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 08:36:30,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:30,398 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:30,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:36:30,399 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1220038780, now seen corresponding path program 10 times [2020-10-28 08:36:30,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:30,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758107147] [2020-10-28 08:36:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:30,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:30,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:30,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:35,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:35,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 08:36:35,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:35,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:36:35,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:35,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:35,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:36:35,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:35,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 08:36:35,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:35,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:35,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:35,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:35,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:35,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:35,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 08:36:35,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:35,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:35,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:35,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:35,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:36:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-28 08:36:35,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758107147] [2020-10-28 08:36:35,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:35,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:36:35,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328677151] [2020-10-28 08:36:35,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:36:35,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:35,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:36:35,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:36:35,719 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 15 states. [2020-10-28 08:36:36,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:36,266 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-28 08:36:36,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:36:36,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-10-28 08:36:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:36,268 INFO L225 Difference]: With dead ends: 136 [2020-10-28 08:36:36,268 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 08:36:36,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:36:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 08:36:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-28 08:36:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 08:36:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-28 08:36:36,279 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 76 [2020-10-28 08:36:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:36,279 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-28 08:36:36,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:36:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-28 08:36:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 08:36:36,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:36,280 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:36,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:36:36,281 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1793905250, now seen corresponding path program 11 times [2020-10-28 08:36:36,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:36,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222206522] [2020-10-28 08:36:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:36,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:36,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:36,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:41,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:41,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 08:36:41,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:41,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:36:41,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:41,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:41,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:36:41,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:41,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 08:36:41,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:41,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:41,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:41,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:41,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:41,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:41,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 08:36:41,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:41,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:41,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:41,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:41,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:41,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:36:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-28 08:36:41,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222206522] [2020-10-28 08:36:41,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:41,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:36:41,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632362791] [2020-10-28 08:36:41,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:36:41,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:36:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:36:41,642 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 16 states. [2020-10-28 08:36:42,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:42,280 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-10-28 08:36:42,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:36:42,281 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2020-10-28 08:36:42,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:42,282 INFO L225 Difference]: With dead ends: 146 [2020-10-28 08:36:42,282 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 08:36:42,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:36:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 08:36:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-10-28 08:36:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 08:36:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-28 08:36:42,307 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 82 [2020-10-28 08:36:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:42,308 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-28 08:36:42,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:36:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-28 08:36:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 08:36:42,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:42,311 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:42,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:36:42,311 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1748111304, now seen corresponding path program 12 times [2020-10-28 08:36:42,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:42,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813874691] [2020-10-28 08:36:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:42,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:42,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:43,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:47,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:47,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 08:36:47,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:36:47,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 08:36:47,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:47,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:47,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:36:47,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:47,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 08:36:47,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:47,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:47,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:47,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:47,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:47,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:36:47,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:47,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:47,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:47,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-28 08:36:47,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813874691] [2020-10-28 08:36:47,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:47,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:36:47,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897616586] [2020-10-28 08:36:47,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:36:47,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:47,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:36:47,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:36:47,667 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 17 states. [2020-10-28 08:36:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:48,285 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2020-10-28 08:36:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:36:48,285 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2020-10-28 08:36:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:48,287 INFO L225 Difference]: With dead ends: 156 [2020-10-28 08:36:48,287 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 08:36:48,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:36:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 08:36:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2020-10-28 08:36:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 08:36:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-28 08:36:48,303 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2020-10-28 08:36:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:48,303 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-28 08:36:48,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:36:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-28 08:36:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 08:36:48,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:48,305 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:48,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:36:48,305 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1445631826, now seen corresponding path program 13 times [2020-10-28 08:36:48,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:48,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797725961] [2020-10-28 08:36:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:48,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:48,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:53,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:53,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 08:36:53,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:36:53,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 08:36:53,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:53,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:53,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:36:53,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:53,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 08:36:53,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:53,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:53,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:53,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:53,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:53,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:53,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:36:53,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:53,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:53,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-28 08:36:53,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797725961] [2020-10-28 08:36:53,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:53,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:36:53,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496835615] [2020-10-28 08:36:53,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:36:53,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:53,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:36:53,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:36:53,662 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 18 states. [2020-10-28 08:36:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:36:54,357 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2020-10-28 08:36:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:36:54,357 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-10-28 08:36:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:36:54,359 INFO L225 Difference]: With dead ends: 166 [2020-10-28 08:36:54,359 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 08:36:54,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=366, Invalid=690, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:36:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 08:36:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2020-10-28 08:36:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 08:36:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-28 08:36:54,368 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 94 [2020-10-28 08:36:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:36:54,368 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-28 08:36:54,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:36:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-28 08:36:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 08:36:54,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:36:54,369 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:36:54,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:36:54,370 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:36:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:36:54,370 INFO L82 PathProgramCache]: Analyzing trace with hash 731659540, now seen corresponding path program 14 times [2020-10-28 08:36:54,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:36:54,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982775524] [2020-10-28 08:36:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:36:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:54,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:54,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:59,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:59,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 08:36:59,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:36:59,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 08:36:59,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:59,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:36:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:36:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 08:36:59,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:59,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:36:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:36:59,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:36:59,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:36:59,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:36:59,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:36:59,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:36:59,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:36:59,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:36:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:36:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:36:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:36:59,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:36:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-28 08:36:59,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982775524] [2020-10-28 08:36:59,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:36:59,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:36:59,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735118960] [2020-10-28 08:36:59,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:36:59,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:36:59,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:36:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:36:59,777 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 19 states. [2020-10-28 08:37:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:00,531 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2020-10-28 08:37:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:37:00,532 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 100 [2020-10-28 08:37:00,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:00,533 INFO L225 Difference]: With dead ends: 176 [2020-10-28 08:37:00,533 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 08:37:00,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:37:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 08:37:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-28 08:37:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 08:37:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-28 08:37:00,540 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 100 [2020-10-28 08:37:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:00,541 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-28 08:37:00,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:37:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-28 08:37:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 08:37:00,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:00,542 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:00,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:37:00,542 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:00,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1103359226, now seen corresponding path program 15 times [2020-10-28 08:37:00,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:00,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23104990] [2020-10-28 08:37:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:00,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:00,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:05,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:05,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 08:37:05,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:37:05,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:37:05,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:05,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:37:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:37:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 08:37:05,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:05,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:05,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:05,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:05,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:05,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:05,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:37:05,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:05,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:37:05,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-28 08:37:05,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23104990] [2020-10-28 08:37:05,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:05,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:37:05,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554003380] [2020-10-28 08:37:05,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:37:05,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:05,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:37:05,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:37:05,956 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 20 states. [2020-10-28 08:37:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:06,776 INFO L93 Difference]: Finished difference Result 186 states and 192 transitions. [2020-10-28 08:37:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:37:06,777 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 106 [2020-10-28 08:37:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:06,778 INFO L225 Difference]: With dead ends: 186 [2020-10-28 08:37:06,778 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 08:37:06,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=867, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 08:37:06,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 08:37:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-10-28 08:37:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-28 08:37:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-10-28 08:37:06,790 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 106 [2020-10-28 08:37:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:06,790 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-10-28 08:37:06,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:37:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-10-28 08:37:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 08:37:06,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:06,792 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:06,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:37:06,792 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash -553527200, now seen corresponding path program 16 times [2020-10-28 08:37:06,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:06,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639521078] [2020-10-28 08:37:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:06,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:06,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:11,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:11,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 08:37:11,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:37:11,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 08:37:11,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:11,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:11,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:37:11,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:37:11,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 08:37:11,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:12,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:12,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:12,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:12,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:12,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:12,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:37:12,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:12,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:12,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:37:12,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-28 08:37:12,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639521078] [2020-10-28 08:37:12,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:12,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:37:12,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137709386] [2020-10-28 08:37:12,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:37:12,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:37:12,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:37:12,244 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 21 states. [2020-10-28 08:37:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:13,135 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2020-10-28 08:37:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:37:13,136 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 112 [2020-10-28 08:37:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:13,138 INFO L225 Difference]: With dead ends: 196 [2020-10-28 08:37:13,138 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 08:37:13,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=963, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 08:37:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 08:37:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-10-28 08:37:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 08:37:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-28 08:37:13,147 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 112 [2020-10-28 08:37:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:13,148 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-28 08:37:13,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:37:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-28 08:37:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 08:37:13,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:13,149 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:13,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:37:13,150 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:13,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1518559046, now seen corresponding path program 17 times [2020-10-28 08:37:13,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:13,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927754071] [2020-10-28 08:37:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:13,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:13,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:18,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:18,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 08:37:18,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:37:18,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:37:18,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:18,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:37:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:37:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 08:37:18,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:18,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:18,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:18,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:18,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:18,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:18,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:37:18,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:18,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:37:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-28 08:37:18,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927754071] [2020-10-28 08:37:18,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:18,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:37:18,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737037965] [2020-10-28 08:37:18,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:37:18,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:18,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:37:18,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:37:18,612 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 22 states. [2020-10-28 08:37:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:19,535 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2020-10-28 08:37:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:37:19,535 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 118 [2020-10-28 08:37:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:19,537 INFO L225 Difference]: With dead ends: 206 [2020-10-28 08:37:19,537 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 08:37:19,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=576, Invalid=1064, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 08:37:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 08:37:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-10-28 08:37:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 08:37:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-10-28 08:37:19,547 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2020-10-28 08:37:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:19,547 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-10-28 08:37:19,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:37:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-10-28 08:37:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 08:37:19,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:19,549 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:19,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:37:19,549 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1242701396, now seen corresponding path program 18 times [2020-10-28 08:37:19,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:19,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173155879] [2020-10-28 08:37:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:19,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:19,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:24,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:24,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 08:37:24,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:37:24,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5162 [2020-10-28 08:37:24,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:24,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:24,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:37:24,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:37:24,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 08:37:24,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:25,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:25,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:25,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:25,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:25,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:25,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:37:25,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:25,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:25,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:37:25,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-28 08:37:25,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173155879] [2020-10-28 08:37:25,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:25,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:37:25,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500411035] [2020-10-28 08:37:25,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:37:25,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:25,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:37:25,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:37:25,238 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 23 states. [2020-10-28 08:37:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:26,174 INFO L93 Difference]: Finished difference Result 216 states and 222 transitions. [2020-10-28 08:37:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:37:26,174 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 124 [2020-10-28 08:37:26,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:26,176 INFO L225 Difference]: With dead ends: 216 [2020-10-28 08:37:26,176 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 08:37:26,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=636, Invalid=1170, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 08:37:26,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 08:37:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-28 08:37:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 08:37:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2020-10-28 08:37:26,192 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 124 [2020-10-28 08:37:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:26,193 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2020-10-28 08:37:26,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:37:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2020-10-28 08:37:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 08:37:26,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:26,195 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:26,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:37:26,195 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1667153810, now seen corresponding path program 19 times [2020-10-28 08:37:26,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:26,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677094095] [2020-10-28 08:37:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:26,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:26,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:31,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:31,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-28 08:37:31,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:37:31,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5171 [2020-10-28 08:37:31,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:31,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:31,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:37:31,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:37:31,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 08:37:31,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:31,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:31,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:31,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:31,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:31,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:31,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:37:31,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:31,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:31,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:31,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:31,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:37:31,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-10-28 08:37:31,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677094095] [2020-10-28 08:37:31,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:31,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:37:31,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427391921] [2020-10-28 08:37:31,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:37:31,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:37:31,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:37:31,927 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 24 states. [2020-10-28 08:37:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:33,024 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2020-10-28 08:37:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:37:33,024 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 130 [2020-10-28 08:37:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:33,026 INFO L225 Difference]: With dead ends: 226 [2020-10-28 08:37:33,026 INFO L226 Difference]: Without dead ends: 140 [2020-10-28 08:37:33,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1281, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 08:37:33,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-28 08:37:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-10-28 08:37:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 08:37:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2020-10-28 08:37:33,041 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 130 [2020-10-28 08:37:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:33,041 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2020-10-28 08:37:33,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:37:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2020-10-28 08:37:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 08:37:33,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:33,043 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:33,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:37:33,043 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1955899144, now seen corresponding path program 20 times [2020-10-28 08:37:33,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:33,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895364523] [2020-10-28 08:37:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:33,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:33,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:38,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:38,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 08:37:38,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:37:38,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-28 08:37:38,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:38,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:38,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:37:38,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:37:38,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 08:37:38,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:38,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:38,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:38,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:38,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:38,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:38,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:37:38,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:38,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:38,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:37:38,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-28 08:37:38,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895364523] [2020-10-28 08:37:38,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:38,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:37:38,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886297068] [2020-10-28 08:37:38,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:37:38,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:38,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:37:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:37:38,735 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 25 states. [2020-10-28 08:37:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:39,727 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2020-10-28 08:37:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:37:39,729 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2020-10-28 08:37:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:39,731 INFO L225 Difference]: With dead ends: 236 [2020-10-28 08:37:39,731 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 08:37:39,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=765, Invalid=1397, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 08:37:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 08:37:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-28 08:37:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 08:37:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2020-10-28 08:37:39,744 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 136 [2020-10-28 08:37:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:39,744 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2020-10-28 08:37:39,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:37:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2020-10-28 08:37:39,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-28 08:37:39,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:39,746 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:39,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:37:39,747 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:39,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:39,747 INFO L82 PathProgramCache]: Analyzing trace with hash -752808482, now seen corresponding path program 21 times [2020-10-28 08:37:39,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:39,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884656141] [2020-10-28 08:37:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:39,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:39,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:44,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:44,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-28 08:37:44,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:37:44,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-28 08:37:44,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:44,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:44,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:37:44,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:37:44,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 08:37:44,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:45,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:45,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:45,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:45,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:45,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:45,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:37:45,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:45,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:45,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:45,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:45,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:37:45,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-28 08:37:45,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884656141] [2020-10-28 08:37:45,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:45,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:37:45,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178574483] [2020-10-28 08:37:45,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:37:45,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:45,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:37:45,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:37:45,448 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 26 states. [2020-10-28 08:37:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:46,589 INFO L93 Difference]: Finished difference Result 246 states and 252 transitions. [2020-10-28 08:37:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:37:46,589 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 142 [2020-10-28 08:37:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:46,591 INFO L225 Difference]: With dead ends: 246 [2020-10-28 08:37:46,591 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 08:37:46,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 08:37:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 08:37:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2020-10-28 08:37:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 08:37:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2020-10-28 08:37:46,603 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 142 [2020-10-28 08:37:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:46,603 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2020-10-28 08:37:46,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:37:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2020-10-28 08:37:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-28 08:37:46,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:46,605 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:46,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:37:46,605 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1576714684, now seen corresponding path program 22 times [2020-10-28 08:37:46,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:46,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618973503] [2020-10-28 08:37:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:46,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:46,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:51,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:51,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-28 08:37:51,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:37:51,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 08:37:51,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:51,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:37:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:37:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 08:37:51,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:52,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:52,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:52,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:52,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:52,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:52,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:37:52,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:52,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:52,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:52,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:52,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:37:52,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-28 08:37:52,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618973503] [2020-10-28 08:37:52,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:52,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:37:52,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203968229] [2020-10-28 08:37:52,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:37:52,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:52,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:37:52,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:37:52,275 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 27 states. [2020-10-28 08:37:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:37:53,449 INFO L93 Difference]: Finished difference Result 256 states and 262 transitions. [2020-10-28 08:37:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:37:53,450 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 148 [2020-10-28 08:37:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:37:53,451 INFO L225 Difference]: With dead ends: 256 [2020-10-28 08:37:53,451 INFO L226 Difference]: Without dead ends: 158 [2020-10-28 08:37:53,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=906, Invalid=1644, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 08:37:53,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-28 08:37:53,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2020-10-28 08:37:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-28 08:37:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-10-28 08:37:53,466 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2020-10-28 08:37:53,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:37:53,467 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-10-28 08:37:53,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:37:53,467 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-10-28 08:37:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 08:37:53,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:37:53,469 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:37:53,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:37:53,471 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:37:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:37:53,472 INFO L82 PathProgramCache]: Analyzing trace with hash -401257942, now seen corresponding path program 23 times [2020-10-28 08:37:53,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:37:53,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808262763] [2020-10-28 08:37:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:37:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:53,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:53,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:58,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:58,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-28 08:37:58,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:37:58,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-28 08:37:58,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:58,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:58,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:37:58,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:37:58,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 08:37:58,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:59,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:37:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:37:59,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:37:59,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:37:59,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:37:59,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:37:59,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:37:59,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:37:59,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:37:59,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:37:59,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:37:59,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:37:59,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:37:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-28 08:37:59,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808262763] [2020-10-28 08:37:59,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:37:59,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:37:59,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625818254] [2020-10-28 08:37:59,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:37:59,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:37:59,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:37:59,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:37:59,249 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 28 states. [2020-10-28 08:38:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:00,459 INFO L93 Difference]: Finished difference Result 266 states and 272 transitions. [2020-10-28 08:38:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:38:00,460 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-10-28 08:38:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:00,461 INFO L225 Difference]: With dead ends: 266 [2020-10-28 08:38:00,461 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 08:38:00,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=955, Invalid=1697, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 08:38:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 08:38:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2020-10-28 08:38:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-28 08:38:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2020-10-28 08:38:00,471 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 154 [2020-10-28 08:38:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:00,471 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2020-10-28 08:38:00,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:38:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2020-10-28 08:38:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-28 08:38:00,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:00,472 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:00,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:38:00,472 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1673957776, now seen corresponding path program 24 times [2020-10-28 08:38:00,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:00,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084390072] [2020-10-28 08:38:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:00,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:00,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:05,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:05,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 08:38:05,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:38:05,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5254 [2020-10-28 08:38:05,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:05,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:05,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 08:38:05,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:38:05,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 08:38:05,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:06,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:06,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:06,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:06,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:06,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:06,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:38:06,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:06,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:06,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:06,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:06,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:38:06,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-28 08:38:06,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084390072] [2020-10-28 08:38:06,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:06,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:38:06,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544894752] [2020-10-28 08:38:06,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 08:38:06,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:06,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 08:38:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:38:06,449 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 29 states. [2020-10-28 08:38:07,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:07,906 INFO L93 Difference]: Finished difference Result 276 states and 282 transitions. [2020-10-28 08:38:07,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 08:38:07,907 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 160 [2020-10-28 08:38:07,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:07,909 INFO L225 Difference]: With dead ends: 276 [2020-10-28 08:38:07,909 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 08:38:07,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1059, Invalid=1911, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 08:38:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 08:38:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-28 08:38:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-28 08:38:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2020-10-28 08:38:07,919 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 160 [2020-10-28 08:38:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:07,919 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2020-10-28 08:38:07,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 08:38:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2020-10-28 08:38:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-28 08:38:07,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:07,921 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:07,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:38:07,921 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1745253494, now seen corresponding path program 25 times [2020-10-28 08:38:07,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:07,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606092429] [2020-10-28 08:38:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:07,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:08,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:13,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:13,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-28 08:38:13,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:38:13,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5217 [2020-10-28 08:38:13,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:13,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:13,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 08:38:13,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:38:13,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 08:38:13,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:13,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:14,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:14,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:14,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:14,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:14,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:38:14,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:14,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:14,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:14,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:14,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:38:14,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-10-28 08:38:14,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606092429] [2020-10-28 08:38:14,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:14,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 08:38:14,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359557068] [2020-10-28 08:38:14,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 08:38:14,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:14,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 08:38:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:38:14,055 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 30 states. [2020-10-28 08:38:15,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:15,468 INFO L93 Difference]: Finished difference Result 286 states and 292 transitions. [2020-10-28 08:38:15,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:38:15,468 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 166 [2020-10-28 08:38:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:15,470 INFO L225 Difference]: With dead ends: 286 [2020-10-28 08:38:15,470 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 08:38:15,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1140, Invalid=2052, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 08:38:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 08:38:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-10-28 08:38:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-28 08:38:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2020-10-28 08:38:15,479 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 166 [2020-10-28 08:38:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:15,480 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2020-10-28 08:38:15,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 08:38:15,480 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2020-10-28 08:38:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-28 08:38:15,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:15,481 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:15,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:38:15,481 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash 574247644, now seen corresponding path program 26 times [2020-10-28 08:38:15,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:15,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349430639] [2020-10-28 08:38:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:15,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:15,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:20,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:20,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-28 08:38:20,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:38:20,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-28 08:38:20,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:20,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:20,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 08:38:20,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:38:20,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 08:38:20,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:21,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:21,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:21,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:21,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:21,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:21,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:38:21,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:21,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:38:21,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-28 08:38:21,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349430639] [2020-10-28 08:38:21,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:21,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 08:38:21,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914948158] [2020-10-28 08:38:21,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:38:21,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:21,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:38:21,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:38:21,480 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 31 states. [2020-10-28 08:38:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:23,033 INFO L93 Difference]: Finished difference Result 296 states and 302 transitions. [2020-10-28 08:38:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 08:38:23,034 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 172 [2020-10-28 08:38:23,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:23,036 INFO L225 Difference]: With dead ends: 296 [2020-10-28 08:38:23,036 INFO L226 Difference]: Without dead ends: 182 [2020-10-28 08:38:23,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1224, Invalid=2198, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 08:38:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-28 08:38:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2020-10-28 08:38:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 08:38:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2020-10-28 08:38:23,046 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 172 [2020-10-28 08:38:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:23,047 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2020-10-28 08:38:23,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:38:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2020-10-28 08:38:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-28 08:38:23,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:23,049 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:23,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:38:23,049 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:23,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:23,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1614777538, now seen corresponding path program 27 times [2020-10-28 08:38:23,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:23,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230684957] [2020-10-28 08:38:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:23,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:23,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:28,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:28,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-28 08:38:28,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:38:28,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:38:28,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:28,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:38:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:38:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-28 08:38:28,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:28,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:28,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:28,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:28,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:28,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:28,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:38:28,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:28,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:28,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:28,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:28,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:38:28,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-10-28 08:38:28,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230684957] [2020-10-28 08:38:28,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:28,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:38:28,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58244552] [2020-10-28 08:38:28,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:38:28,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:28,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:38:28,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:38:28,942 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 32 states. [2020-10-28 08:38:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:30,652 INFO L93 Difference]: Finished difference Result 306 states and 312 transitions. [2020-10-28 08:38:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 08:38:30,652 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 178 [2020-10-28 08:38:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:30,654 INFO L225 Difference]: With dead ends: 306 [2020-10-28 08:38:30,654 INFO L226 Difference]: Without dead ends: 188 [2020-10-28 08:38:30,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1311, Invalid=2349, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 08:38:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-28 08:38:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2020-10-28 08:38:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-28 08:38:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2020-10-28 08:38:30,664 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2020-10-28 08:38:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:30,664 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2020-10-28 08:38:30,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:38:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2020-10-28 08:38:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-28 08:38:30,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:30,666 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:30,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:38:30,666 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:30,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:30,667 INFO L82 PathProgramCache]: Analyzing trace with hash -697597400, now seen corresponding path program 28 times [2020-10-28 08:38:30,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:30,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6950244] [2020-10-28 08:38:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:30,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:30,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:35,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:35,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-28 08:38:35,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:38:35,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:38:35,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:35,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 08:38:35,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:38:35,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 08:38:35,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:36,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:36,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:36,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:36,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:38:36,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:36,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:38:36,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-28 08:38:36,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6950244] [2020-10-28 08:38:36,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:36,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:38:36,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434520529] [2020-10-28 08:38:36,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 08:38:36,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:36,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 08:38:36,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:38:36,669 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 33 states. [2020-10-28 08:38:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:38,295 INFO L93 Difference]: Finished difference Result 316 states and 322 transitions. [2020-10-28 08:38:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 08:38:38,296 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 184 [2020-10-28 08:38:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:38,297 INFO L225 Difference]: With dead ends: 316 [2020-10-28 08:38:38,297 INFO L226 Difference]: Without dead ends: 194 [2020-10-28 08:38:38,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1401, Invalid=2505, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 08:38:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-28 08:38:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2020-10-28 08:38:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-28 08:38:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2020-10-28 08:38:38,308 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 184 [2020-10-28 08:38:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:38,309 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2020-10-28 08:38:38,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 08:38:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2020-10-28 08:38:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-28 08:38:38,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:38,310 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:38,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:38:38,311 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:38,312 INFO L82 PathProgramCache]: Analyzing trace with hash -443837682, now seen corresponding path program 29 times [2020-10-28 08:38:38,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:38,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218698750] [2020-10-28 08:38:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:38,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:38,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:43,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:43,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-28 08:38:43,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:38:43,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-28 08:38:43,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:43,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 08:38:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:38:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-28 08:38:43,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:44,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:44,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:44,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:44,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:44,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:44,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:38:44,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:44,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:44,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:44,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:44,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:38:44,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2020-10-28 08:38:44,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218698750] [2020-10-28 08:38:44,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:44,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 08:38:44,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819569220] [2020-10-28 08:38:44,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 08:38:44,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:44,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 08:38:44,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:38:44,459 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 34 states. [2020-10-28 08:38:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:46,340 INFO L93 Difference]: Finished difference Result 326 states and 332 transitions. [2020-10-28 08:38:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 08:38:46,341 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 190 [2020-10-28 08:38:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:46,343 INFO L225 Difference]: With dead ends: 326 [2020-10-28 08:38:46,343 INFO L226 Difference]: Without dead ends: 200 [2020-10-28 08:38:46,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1494, Invalid=2666, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 08:38:46,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-28 08:38:46,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-10-28 08:38:46,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-28 08:38:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2020-10-28 08:38:46,354 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 190 [2020-10-28 08:38:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:46,354 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2020-10-28 08:38:46,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 08:38:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2020-10-28 08:38:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-28 08:38:46,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:46,356 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:46,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:38:46,358 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash -521855116, now seen corresponding path program 30 times [2020-10-28 08:38:46,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:46,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966943149] [2020-10-28 08:38:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:46,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:46,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:51,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:51,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-28 08:38:51,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:38:51,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5162 [2020-10-28 08:38:51,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:51,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:51,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 08:38:51,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:38:51,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-28 08:38:51,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:52,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:38:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:52,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:52,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:52,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:38:52,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:38:52,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:38:52,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:52,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:52,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:38:52,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:38:52,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:38:52,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:38:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-28 08:38:52,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966943149] [2020-10-28 08:38:52,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:38:52,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 08:38:52,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718944667] [2020-10-28 08:38:52,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 08:38:52,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:38:52,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 08:38:52,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:38:52,656 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 35 states. [2020-10-28 08:38:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:38:54,638 INFO L93 Difference]: Finished difference Result 336 states and 342 transitions. [2020-10-28 08:38:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 08:38:54,639 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 196 [2020-10-28 08:38:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:38:54,640 INFO L225 Difference]: With dead ends: 336 [2020-10-28 08:38:54,640 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 08:38:54,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1590, Invalid=2832, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 08:38:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 08:38:54,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-10-28 08:38:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 08:38:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2020-10-28 08:38:54,651 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 196 [2020-10-28 08:38:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:38:54,651 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2020-10-28 08:38:54,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 08:38:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2020-10-28 08:38:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-28 08:38:54,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:38:54,653 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:38:54,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:38:54,653 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:38:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:38:54,654 INFO L82 PathProgramCache]: Analyzing trace with hash -734689446, now seen corresponding path program 31 times [2020-10-28 08:38:54,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:38:54,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066831762] [2020-10-28 08:38:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:38:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:38:54,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:54,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:38:59,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:38:59,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-28 08:38:59,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:38:59,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:38:59,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:38:59,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:38:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 08:38:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:38:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-28 08:38:59,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:00,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:39:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:00,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:00,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:00,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:39:00,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:00,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:39:00,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:00,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:00,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:00,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:00,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:39:00,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-10-28 08:39:00,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066831762] [2020-10-28 08:39:00,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:39:00,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 08:39:00,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806246241] [2020-10-28 08:39:00,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 08:39:00,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:39:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 08:39:00,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 08:39:00,850 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 36 states. [2020-10-28 08:39:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:39:02,973 INFO L93 Difference]: Finished difference Result 346 states and 352 transitions. [2020-10-28 08:39:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 08:39:02,973 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 202 [2020-10-28 08:39:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:39:02,975 INFO L225 Difference]: With dead ends: 346 [2020-10-28 08:39:02,975 INFO L226 Difference]: Without dead ends: 212 [2020-10-28 08:39:02,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1689, Invalid=3003, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 08:39:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-28 08:39:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2020-10-28 08:39:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 08:39:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2020-10-28 08:39:02,987 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 202 [2020-10-28 08:39:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:39:02,988 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2020-10-28 08:39:02,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 08:39:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2020-10-28 08:39:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-28 08:39:02,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:39:02,990 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:39:02,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:39:02,990 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:39:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:39:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash -911070528, now seen corresponding path program 32 times [2020-10-28 08:39:02,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:39:02,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300136469] [2020-10-28 08:39:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:39:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:03,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:03,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:08,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:08,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-28 08:39:08,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:39:08,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5186 [2020-10-28 08:39:08,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:08,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:08,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 08:39:08,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:39:08,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-28 08:39:08,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:09,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:39:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:09,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:09,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:09,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:39:09,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:09,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:39:09,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:09,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:09,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:09,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:09,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:39:09,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-28 08:39:09,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300136469] [2020-10-28 08:39:09,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:39:09,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 08:39:09,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132525187] [2020-10-28 08:39:09,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 08:39:09,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:39:09,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 08:39:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 08:39:09,443 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 37 states. [2020-10-28 08:39:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:39:11,623 INFO L93 Difference]: Finished difference Result 356 states and 362 transitions. [2020-10-28 08:39:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 08:39:11,624 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 208 [2020-10-28 08:39:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:39:11,628 INFO L225 Difference]: With dead ends: 356 [2020-10-28 08:39:11,628 INFO L226 Difference]: Without dead ends: 218 [2020-10-28 08:39:11,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1791, Invalid=3179, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 08:39:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-28 08:39:11,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2020-10-28 08:39:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-28 08:39:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2020-10-28 08:39:11,640 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 208 [2020-10-28 08:39:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:39:11,641 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2020-10-28 08:39:11,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 08:39:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2020-10-28 08:39:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-28 08:39:11,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:39:11,643 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:39:11,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:39:11,643 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:39:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:39:11,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1878496858, now seen corresponding path program 33 times [2020-10-28 08:39:11,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:39:11,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605907496] [2020-10-28 08:39:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:39:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:11,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:11,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:17,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:17,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-28 08:39:17,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:39:17,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5630 [2020-10-28 08:39:17,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:17,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:17,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 08:39:17,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:39:17,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-28 08:39:17,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:18,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:39:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:18,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:18,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:18,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:39:18,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:18,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:39:18,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:18,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:18,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:39:18,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2020-10-28 08:39:18,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605907496] [2020-10-28 08:39:18,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:39:18,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 08:39:18,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218182882] [2020-10-28 08:39:18,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 08:39:18,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:39:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 08:39:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 08:39:18,596 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 38 states. [2020-10-28 08:39:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:39:20,956 INFO L93 Difference]: Finished difference Result 366 states and 372 transitions. [2020-10-28 08:39:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 08:39:20,957 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 214 [2020-10-28 08:39:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:39:20,959 INFO L225 Difference]: With dead ends: 366 [2020-10-28 08:39:20,959 INFO L226 Difference]: Without dead ends: 224 [2020-10-28 08:39:20,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1860, Invalid=3252, Unknown=0, NotChecked=0, Total=5112 [2020-10-28 08:39:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-28 08:39:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2020-10-28 08:39:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-28 08:39:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2020-10-28 08:39:20,972 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 214 [2020-10-28 08:39:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:39:20,973 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2020-10-28 08:39:20,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 08:39:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2020-10-28 08:39:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-28 08:39:20,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:39:20,975 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:39:20,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:39:20,975 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:39:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:39:20,975 INFO L82 PathProgramCache]: Analyzing trace with hash 6136844, now seen corresponding path program 34 times [2020-10-28 08:39:20,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:39:20,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502144888] [2020-10-28 08:39:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:39:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:21,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:21,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:26,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:26,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-28 08:39:26,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:39:26,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5274 [2020-10-28 08:39:26,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:26,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:26,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 08:39:26,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 08:39:26,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-28 08:39:26,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:27,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:39:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:27,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:27,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:39:27,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:39:27,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:39:27,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:39:27,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:39:27,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:39:27,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:39:27,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:39:27,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:39:27,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:39:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-28 08:39:27,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502144888] [2020-10-28 08:39:27,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:39:27,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 08:39:27,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709136] [2020-10-28 08:39:27,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 08:39:27,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:39:27,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 08:39:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 08:39:27,641 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 39 states. [2020-10-28 08:39:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:39:29,923 INFO L93 Difference]: Finished difference Result 376 states and 382 transitions. [2020-10-28 08:39:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 08:39:29,924 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 220 [2020-10-28 08:39:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:39:29,926 INFO L225 Difference]: With dead ends: 376 [2020-10-28 08:39:29,926 INFO L226 Difference]: Without dead ends: 230 [2020-10-28 08:39:29,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2004, Invalid=3546, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 08:39:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-28 08:39:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-10-28 08:39:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-28 08:39:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2020-10-28 08:39:29,936 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 220 [2020-10-28 08:39:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:39:29,937 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2020-10-28 08:39:29,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 08:39:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2020-10-28 08:39:29,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-28 08:39:29,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:39:29,939 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:39:29,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:39:29,940 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:39:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:39:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1001440782, now seen corresponding path program 35 times [2020-10-28 08:39:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:39:29,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381448761] [2020-10-28 08:39:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:39:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:39:30,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:39:30,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking...