/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:22:57,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:22:57,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:22:58,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:22:58,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:22:58,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:22:58,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:22:58,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:22:58,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:22:58,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:22:58,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:22:58,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:22:58,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:22:58,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:22:58,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:22:58,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:22:58,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:22:58,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:22:58,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:22:58,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:22:58,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:22:58,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:22:58,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:22:58,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:22:58,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:22:58,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:22:58,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:22:58,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:22:58,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:22:58,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:22:58,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:22:58,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:22:58,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:22:58,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:22:58,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:22:58,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:22:58,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:22:58,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:22:58,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:22:58,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:22:58,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:22:58,111 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 03:22:58,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:22:58,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:22:58,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:22:58,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:22:58,166 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:22:58,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:22:58,166 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:22:58,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:22:58,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:22:58,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:22:58,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:22:58,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:22:58,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:22:58,169 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:22:58,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:22:58,170 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:22:58,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:22:58,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:22:58,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:22:58,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:22:58,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:22:58,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:22:58,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:22:58,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:22:58,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:22:58,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:22:58,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:22:58,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:22:58,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:22:58,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:22:58,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:22:58,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:22:58,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:22:58,640 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:22:58,641 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:22:58,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum1.c [2020-10-29 03:22:58,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7976e70e6/fbd7cd90a81c49edb8db8acbb1bbe492/FLAG4ce225e6b [2020-10-29 03:22:59,296 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:22:59,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum1.c [2020-10-29 03:22:59,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7976e70e6/fbd7cd90a81c49edb8db8acbb1bbe492/FLAG4ce225e6b [2020-10-29 03:22:59,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7976e70e6/fbd7cd90a81c49edb8db8acbb1bbe492 [2020-10-29 03:22:59,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:22:59,664 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:22:59,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:22:59,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:22:59,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:22:59,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:22:59" (1/1) ... [2020-10-29 03:22:59,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@290b80f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59, skipping insertion in model container [2020-10-29 03:22:59,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:22:59" (1/1) ... [2020-10-29 03:22:59,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:22:59,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:22:59,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:22:59,883 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:22:59,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:22:59,923 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:22:59,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59 WrapperNode [2020-10-29 03:22:59,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:22:59,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:22:59,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:22:59,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:22:59,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59" (1/1) ... [2020-10-29 03:22:59,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59" (1/1) ... [2020-10-29 03:22:59,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59" (1/1) ... [2020-10-29 03:22:59,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59" (1/1) ... [2020-10-29 03:22:59,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59" (1/1) ... [2020-10-29 03:22:59,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59" (1/1) ... [2020-10-29 03:22:59,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59" (1/1) ... [2020-10-29 03:22:59,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:22:59,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:22:59,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:22:59,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:22:59,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:23:00,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:23:00,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:23:00,049 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:23:00,049 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:23:00,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:23:00,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:23:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:23:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:23:00,049 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:23:00,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:23:00,052 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:23:00,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:23:00,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-29 03:23:00,052 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:23:00,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:23:00,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:23:00,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:23:00,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:23:00,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:23:00,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:23:00,374 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:23:00,374 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-29 03:23:00,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:23:00 BoogieIcfgContainer [2020-10-29 03:23:00,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:23:00,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:23:00,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:23:00,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:23:00,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:22:59" (1/3) ... [2020-10-29 03:23:00,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba2c835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:23:00, skipping insertion in model container [2020-10-29 03:23:00,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:22:59" (2/3) ... [2020-10-29 03:23:00,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba2c835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:23:00, skipping insertion in model container [2020-10-29 03:23:00,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:23:00" (3/3) ... [2020-10-29 03:23:00,390 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2020-10-29 03:23:00,407 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:23:00,413 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:23:00,432 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:23:00,543 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:23:00,543 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:23:00,549 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:23:00,549 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:23:00,549 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:23:00,550 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:23:00,550 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:23:00,550 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:23:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-29 03:23:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 03:23:00,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:00,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:00,579 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:00,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2013044110, now seen corresponding path program 1 times [2020-10-29 03:23:00,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:00,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558162433] [2020-10-29 03:23:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:00,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:00,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:00,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:01,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:01,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:01,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 03:23:01,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:23:01,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-29 03:23:01,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:01,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:23:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 03:23:01,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:23:01,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:01,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:01,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:01,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:01,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:01,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:23:01,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:01,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:01,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:01,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558162433] [2020-10-29 03:23:01,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:23:01,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 03:23:01,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331734046] [2020-10-29 03:23:01,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:23:01,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:01,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:23:01,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:23:01,844 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 6 states. [2020-10-29 03:23:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:02,105 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-10-29 03:23:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:23:02,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-29 03:23:02,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:02,115 INFO L225 Difference]: With dead ends: 64 [2020-10-29 03:23:02,116 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 03:23:02,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:23:02,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 03:23:02,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-29 03:23:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 03:23:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-29 03:23:02,162 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2020-10-29 03:23:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:02,162 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-29 03:23:02,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:23:02,163 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-29 03:23:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 03:23:02,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:02,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:02,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:23:02,165 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1367879180, now seen corresponding path program 1 times [2020-10-29 03:23:02,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:02,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183242653] [2020-10-29 03:23:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:02,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:02,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 03:23:02,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:23:02,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-29 03:23:02,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:02,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:23:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 03:23:02,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:02,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:02,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:02,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:02,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:02,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 03:23:02,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:02,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:02,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:02,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:02,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:02,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:02,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183242653] [2020-10-29 03:23:02,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:02,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 03:23:02,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168065531] [2020-10-29 03:23:02,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:23:02,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:23:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:23:02,610 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-10-29 03:23:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:02,756 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-29 03:23:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 03:23:02,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-29 03:23:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:02,758 INFO L225 Difference]: With dead ends: 38 [2020-10-29 03:23:02,758 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 03:23:02,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:23:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 03:23:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 03:23:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 03:23:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-29 03:23:02,768 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-29 03:23:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:02,768 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-29 03:23:02,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:23:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-29 03:23:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 03:23:02,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:02,770 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:02,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:23:02,770 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:02,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:02,771 INFO L82 PathProgramCache]: Analyzing trace with hash -741610246, now seen corresponding path program 1 times [2020-10-29 03:23:02,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:02,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985583816] [2020-10-29 03:23:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:02,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:04,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:04,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 03:23:04,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:23:04,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1354 [2020-10-29 03:23:04,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:04,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:04,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:23:04,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:04,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:23:04,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:04,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:04,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:04,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:04,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:04,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:04,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:23:04,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:04,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:04,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:04,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:04,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:04,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985583816] [2020-10-29 03:23:04,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:04,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:23:04,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738901138] [2020-10-29 03:23:04,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:23:04,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:04,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:23:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:23:04,514 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 14 states. [2020-10-29 03:23:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:04,834 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-29 03:23:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:23:04,834 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-29 03:23:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:04,836 INFO L225 Difference]: With dead ends: 41 [2020-10-29 03:23:04,836 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 03:23:04,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:04,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 03:23:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-29 03:23:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 03:23:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-29 03:23:04,845 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2020-10-29 03:23:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:04,846 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-29 03:23:04,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:23:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-29 03:23:04,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 03:23:04,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:04,847 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:04,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:23:04,848 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:04,848 INFO L82 PathProgramCache]: Analyzing trace with hash 709352060, now seen corresponding path program 2 times [2020-10-29 03:23:04,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:04,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004137705] [2020-10-29 03:23:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:04,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:04,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:05,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 03:23:05,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:05,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-29 03:23:05,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:05,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:05,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:23:05,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:05,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 03:23:05,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:05,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:05,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:05,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:05,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:05,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:05,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:05,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:05,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:05,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004137705] [2020-10-29 03:23:05,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:05,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:23:05,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526253275] [2020-10-29 03:23:05,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:23:05,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:05,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:23:05,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:23:05,356 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2020-10-29 03:23:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:05,605 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-29 03:23:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:23:05,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 03:23:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:05,607 INFO L225 Difference]: With dead ends: 53 [2020-10-29 03:23:05,607 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 03:23:05,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:23:05,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 03:23:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2020-10-29 03:23:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 03:23:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-29 03:23:05,615 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-29 03:23:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:05,616 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-29 03:23:05,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:23:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-29 03:23:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 03:23:05,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:05,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:05,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:23:05,617 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:05,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:05,618 INFO L82 PathProgramCache]: Analyzing trace with hash -403832260, now seen corresponding path program 3 times [2020-10-29 03:23:05,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:05,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816760150] [2020-10-29 03:23:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:05,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:05,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 03:23:05,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:05,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-29 03:23:05,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:05,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:05,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:23:05,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:05,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:23:05,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:06,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:06,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:06,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:06,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:06,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:06,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:06,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:06,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:06,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:06,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:06,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:06,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816760150] [2020-10-29 03:23:06,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:06,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:23:06,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083301232] [2020-10-29 03:23:06,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:23:06,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:06,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:23:06,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:23:06,114 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-29 03:23:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:06,407 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-29 03:23:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:23:06,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 03:23:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:06,408 INFO L225 Difference]: With dead ends: 37 [2020-10-29 03:23:06,408 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 03:23:06,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 03:23:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-29 03:23:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 03:23:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-29 03:23:06,417 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2020-10-29 03:23:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:06,417 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-29 03:23:06,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:23:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-29 03:23:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 03:23:06,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:06,418 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:06,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:23:06,419 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:06,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:06,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1103517890, now seen corresponding path program 4 times [2020-10-29 03:23:06,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:06,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497069613] [2020-10-29 03:23:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:06,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:06,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:06,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:06,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:07,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:08,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:08,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 03:23:08,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:23:08,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2460 [2020-10-29 03:23:08,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:08,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:08,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:23:08,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:08,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 03:23:08,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:09,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:09,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:09,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:09,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:09,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:09,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:09,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:09,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:09,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:09,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497069613] [2020-10-29 03:23:09,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:09,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:23:09,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775488082] [2020-10-29 03:23:09,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:23:09,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:23:09,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:23:09,500 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 18 states. [2020-10-29 03:23:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:10,129 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-29 03:23:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:23:10,130 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-29 03:23:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:10,131 INFO L225 Difference]: With dead ends: 47 [2020-10-29 03:23:10,131 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 03:23:10,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:23:10,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 03:23:10,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-29 03:23:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 03:23:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-29 03:23:10,141 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-10-29 03:23:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:10,141 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-29 03:23:10,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:23:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-29 03:23:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:23:10,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:10,143 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:10,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:23:10,143 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:10,144 INFO L82 PathProgramCache]: Analyzing trace with hash 808457152, now seen corresponding path program 5 times [2020-10-29 03:23:10,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:10,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418527711] [2020-10-29 03:23:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:10,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:10,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 03:23:10,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:10,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-29 03:23:10,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:10,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:23:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 03:23:10,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:10,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:10,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:10,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:10,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:10,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:10,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:10,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:10,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:10,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:10,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:10,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:10,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418527711] [2020-10-29 03:23:10,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:10,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:23:10,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805706339] [2020-10-29 03:23:10,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:23:10,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:10,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:23:10,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:23:10,801 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 12 states. [2020-10-29 03:23:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:11,108 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-29 03:23:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:23:11,110 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-29 03:23:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:11,111 INFO L225 Difference]: With dead ends: 59 [2020-10-29 03:23:11,111 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 03:23:11,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 03:23:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-10-29 03:23:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 03:23:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-29 03:23:11,122 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2020-10-29 03:23:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:11,122 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-29 03:23:11,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:23:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-29 03:23:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:23:11,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:11,124 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:11,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:23:11,124 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash 485182336, now seen corresponding path program 6 times [2020-10-29 03:23:11,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:11,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742589330] [2020-10-29 03:23:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:11,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:11,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:11,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:11,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 03:23:11,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:11,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-29 03:23:11,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:11,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:23:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:23:11,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:11,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:11,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:11,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:11,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:11,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:11,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:23:11,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:11,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:11,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:11,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:11,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:11,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:11,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742589330] [2020-10-29 03:23:11,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:11,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:23:11,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995408103] [2020-10-29 03:23:11,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:23:11,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:11,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:23:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:23:11,795 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-29 03:23:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:12,134 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-29 03:23:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:23:12,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-29 03:23:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:12,136 INFO L225 Difference]: With dead ends: 41 [2020-10-29 03:23:12,136 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 03:23:12,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:23:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 03:23:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 03:23:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 03:23:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-29 03:23:12,154 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2020-10-29 03:23:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:12,155 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-29 03:23:12,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:23:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-29 03:23:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 03:23:12,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:12,157 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:12,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:23:12,158 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:12,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:12,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1458983038, now seen corresponding path program 7 times [2020-10-29 03:23:12,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:12,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354839687] [2020-10-29 03:23:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:12,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:12,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:12,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:13,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:14,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:14,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:15,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:23:15,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:23:15,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3048 [2020-10-29 03:23:15,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:15,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:15,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:23:15,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:15,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:23:15,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:16,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:16,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:16,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:16,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:16,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 03:23:16,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:16,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:16,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:16,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:23:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:16,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354839687] [2020-10-29 03:23:16,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:16,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:23:16,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671215992] [2020-10-29 03:23:16,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:23:16,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:23:16,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:23:16,191 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 22 states. [2020-10-29 03:23:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:16,923 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-29 03:23:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:23:16,924 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-29 03:23:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:16,925 INFO L225 Difference]: With dead ends: 53 [2020-10-29 03:23:16,925 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 03:23:16,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:23:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 03:23:16,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-10-29 03:23:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 03:23:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-29 03:23:16,935 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2020-10-29 03:23:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:16,935 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-29 03:23:16,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:23:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-29 03:23:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 03:23:16,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:16,936 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:16,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:23:16,937 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1491133692, now seen corresponding path program 8 times [2020-10-29 03:23:16,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:16,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947270740] [2020-10-29 03:23:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:17,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 03:23:17,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:17,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-29 03:23:17,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:17,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:23:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:23:17,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:17,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:17,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:17,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:17,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:17,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:17,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:17,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:17,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:17,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:17,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:17,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:17,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947270740] [2020-10-29 03:23:17,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:17,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:23:17,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900950019] [2020-10-29 03:23:17,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:23:17,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:17,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:23:17,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:23:17,720 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 14 states. [2020-10-29 03:23:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:18,032 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-10-29 03:23:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:23:18,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-29 03:23:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:18,034 INFO L225 Difference]: With dead ends: 65 [2020-10-29 03:23:18,035 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 03:23:18,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:23:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 03:23:18,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2020-10-29 03:23:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 03:23:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-29 03:23:18,052 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 35 [2020-10-29 03:23:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:18,053 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-29 03:23:18,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:23:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-29 03:23:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 03:23:18,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:18,055 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:18,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:23:18,055 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:18,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:18,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1374380740, now seen corresponding path program 9 times [2020-10-29 03:23:18,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:18,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343529670] [2020-10-29 03:23:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:18,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:18,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:18,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:18,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 03:23:18,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:18,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-29 03:23:18,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:18,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:18,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:23:18,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:18,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:23:18,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:18,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:18,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:18,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:18,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:18,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:18,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:23:18,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:18,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:18,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:18,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:18,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:18,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:18,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343529670] [2020-10-29 03:23:18,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:18,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:23:18,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225368348] [2020-10-29 03:23:18,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:23:18,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:18,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:23:18,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:23:18,916 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-29 03:23:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:19,324 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-29 03:23:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:23:19,325 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-29 03:23:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:19,326 INFO L225 Difference]: With dead ends: 45 [2020-10-29 03:23:19,326 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 03:23:19,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:23:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 03:23:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 03:23:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 03:23:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-29 03:23:19,342 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2020-10-29 03:23:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:19,342 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-29 03:23:19,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:23:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-29 03:23:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 03:23:19,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:19,343 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:19,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:23:19,344 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:19,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1637808698, now seen corresponding path program 10 times [2020-10-29 03:23:19,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:19,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240067500] [2020-10-29 03:23:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:19,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:19,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:19,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:20,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:21,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:21,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:21,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:22,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 03:23:22,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:23:22,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3623 [2020-10-29 03:23:22,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:22,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:23:22,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:22,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:23:22,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:24,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:24,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:24,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:24,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:24,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:24,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:24,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:24,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:24,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:24,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:24,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240067500] [2020-10-29 03:23:24,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:24,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:23:24,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345398937] [2020-10-29 03:23:24,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:23:24,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:23:24,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:23:24,294 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 26 states. [2020-10-29 03:23:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:25,343 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-29 03:23:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:23:25,343 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-29 03:23:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:25,345 INFO L225 Difference]: With dead ends: 59 [2020-10-29 03:23:25,345 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 03:23:25,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:23:25,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 03:23:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-29 03:23:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 03:23:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-29 03:23:25,357 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2020-10-29 03:23:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:25,357 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-29 03:23:25,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:23:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-29 03:23:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:23:25,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:25,358 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:25,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:23:25,359 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1543901112, now seen corresponding path program 11 times [2020-10-29 03:23:25,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:25,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550048678] [2020-10-29 03:23:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:25,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:25,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:26,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:26,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 03:23:26,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:26,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-29 03:23:26,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:26,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:23:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:23:26,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:26,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:26,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:26,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:26,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:26,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:26,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:26,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:26,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:26,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:26,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:26,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:26,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:26,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550048678] [2020-10-29 03:23:26,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:26,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:23:26,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689963155] [2020-10-29 03:23:26,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:23:26,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:23:26,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:23:26,250 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 16 states. [2020-10-29 03:23:26,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:26,691 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-10-29 03:23:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:23:26,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-29 03:23:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:26,693 INFO L225 Difference]: With dead ends: 71 [2020-10-29 03:23:26,693 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 03:23:26,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:23:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 03:23:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2020-10-29 03:23:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 03:23:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-29 03:23:26,704 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 39 [2020-10-29 03:23:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:26,704 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-29 03:23:26,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:23:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-29 03:23:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:23:26,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:26,705 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:26,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:23:26,706 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash -858568696, now seen corresponding path program 12 times [2020-10-29 03:23:26,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:26,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694473741] [2020-10-29 03:23:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:26,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:26,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:27,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:27,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 03:23:27,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:27,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-29 03:23:27,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:27,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:27,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:23:27,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:27,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:23:27,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:27,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:27,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:27,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:27,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:27,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:27,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:27,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:27,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:27,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:27,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:27,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:27,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:27,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694473741] [2020-10-29 03:23:27,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:27,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:23:27,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868723835] [2020-10-29 03:23:27,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:23:27,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:27,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:23:27,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:23:27,545 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-29 03:23:28,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:28,103 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-29 03:23:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:23:28,104 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-29 03:23:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:28,105 INFO L225 Difference]: With dead ends: 49 [2020-10-29 03:23:28,105 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 03:23:28,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:23:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 03:23:28,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 03:23:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 03:23:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-29 03:23:28,122 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2020-10-29 03:23:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:28,123 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-29 03:23:28,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:23:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-29 03:23:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:23:28,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:28,124 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:28,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:23:28,125 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:28,125 INFO L82 PathProgramCache]: Analyzing trace with hash -18568694, now seen corresponding path program 13 times [2020-10-29 03:23:28,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:28,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917301651] [2020-10-29 03:23:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:28,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:31,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:31,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:32,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:32,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:23:32,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:23:32,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4770 [2020-10-29 03:23:32,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:32,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:23:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 03:23:32,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:34,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:34,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:34,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:34,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:34,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:34,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:23:34,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:34,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:34,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:34,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917301651] [2020-10-29 03:23:34,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:34,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 03:23:34,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847763257] [2020-10-29 03:23:34,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 03:23:34,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 03:23:34,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:23:34,516 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 30 states. [2020-10-29 03:23:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:35,860 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-10-29 03:23:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 03:23:35,860 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2020-10-29 03:23:35,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:35,862 INFO L225 Difference]: With dead ends: 65 [2020-10-29 03:23:35,862 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:23:35,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=75, Invalid=981, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:23:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:23:35,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-29 03:23:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:23:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-29 03:23:35,874 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2020-10-29 03:23:35,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:35,874 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-29 03:23:35,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 03:23:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-29 03:23:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:23:35,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:35,875 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:35,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:23:35,876 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:35,876 INFO L82 PathProgramCache]: Analyzing trace with hash -232418420, now seen corresponding path program 14 times [2020-10-29 03:23:35,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:35,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975396916] [2020-10-29 03:23:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:35,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:35,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:36,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:36,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 03:23:36,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:36,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-29 03:23:36,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:36,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:36,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:23:36,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:36,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:23:36,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:36,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:36,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:36,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:36,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:36,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:36,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:36,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:36,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:36,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:36,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:36,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:36,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:36,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975396916] [2020-10-29 03:23:36,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:36,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:23:36,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358405693] [2020-10-29 03:23:36,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:23:36,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:36,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:23:36,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:23:36,727 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 18 states. [2020-10-29 03:23:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:37,194 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-10-29 03:23:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:23:37,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-29 03:23:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:37,196 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:23:37,196 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 03:23:37,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:23:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 03:23:37,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-10-29 03:23:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 03:23:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-29 03:23:37,206 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 43 [2020-10-29 03:23:37,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:37,207 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-29 03:23:37,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:23:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-29 03:23:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:23:37,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:37,208 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:37,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:23:37,208 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:37,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1242037068, now seen corresponding path program 15 times [2020-10-29 03:23:37,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:37,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512564523] [2020-10-29 03:23:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:37,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:37,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:37,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:37,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 03:23:37,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:37,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-29 03:23:37,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:37,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:37,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:23:37,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:37,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:23:37,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:38,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:38,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:38,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:38,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:38,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:38,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:38,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:38,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:38,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:38,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:38,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:38,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:38,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512564523] [2020-10-29 03:23:38,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:38,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:23:38,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080837303] [2020-10-29 03:23:38,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:23:38,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:38,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:23:38,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:23:38,078 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2020-10-29 03:23:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:38,765 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-29 03:23:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:23:38,765 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-29 03:23:38,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:38,766 INFO L225 Difference]: With dead ends: 53 [2020-10-29 03:23:38,766 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 03:23:38,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:23:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 03:23:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-29 03:23:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 03:23:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-29 03:23:38,784 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-29 03:23:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:38,784 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-29 03:23:38,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:23:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-29 03:23:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:23:38,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:38,785 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:38,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:23:38,790 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash 28941390, now seen corresponding path program 16 times [2020-10-29 03:23:38,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:38,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218909330] [2020-10-29 03:23:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:38,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:38,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:39,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:39,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:39,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:40,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:41,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:42,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:42,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:43,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:43,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:23:43,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:23:43,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 03:23:43,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:43,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:43,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 03:23:43,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:43,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 03:23:43,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:46,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:46,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:46,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:46,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:46,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:46,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:46,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:46,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:46,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:46,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:46,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:46,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:46,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218909330] [2020-10-29 03:23:46,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:46,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 03:23:46,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798759981] [2020-10-29 03:23:46,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 03:23:46,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 03:23:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1053, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:23:46,092 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 34 states. [2020-10-29 03:23:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:47,695 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-10-29 03:23:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:23:47,696 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-10-29 03:23:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:47,697 INFO L225 Difference]: With dead ends: 71 [2020-10-29 03:23:47,697 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 03:23:47,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:23:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 03:23:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2020-10-29 03:23:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 03:23:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-29 03:23:47,720 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2020-10-29 03:23:47,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:47,721 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-29 03:23:47,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 03:23:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-29 03:23:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:23:47,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:47,724 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:47,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:23:47,724 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:47,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1819867952, now seen corresponding path program 17 times [2020-10-29 03:23:47,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:47,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143919463] [2020-10-29 03:23:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:47,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:47,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:48,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:48,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:23:48,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:48,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 832 [2020-10-29 03:23:48,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:48,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:23:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:23:48,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:48,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:48,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:48,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:48,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:48,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:48,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:48,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:48,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:48,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:48,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:48,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:48,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:48,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143919463] [2020-10-29 03:23:48,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:48,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:23:48,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000103771] [2020-10-29 03:23:48,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:23:48,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:48,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:23:48,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:23:48,850 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 20 states. [2020-10-29 03:23:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:49,363 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-10-29 03:23:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:23:49,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-29 03:23:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:49,365 INFO L225 Difference]: With dead ends: 83 [2020-10-29 03:23:49,365 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:23:49,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:23:49,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:23:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-29 03:23:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 03:23:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-29 03:23:49,380 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 47 [2020-10-29 03:23:49,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:49,380 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-29 03:23:49,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:23:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-29 03:23:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:23:49,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:49,381 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:49,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:23:49,381 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:49,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2087615632, now seen corresponding path program 18 times [2020-10-29 03:23:49,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:49,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354003817] [2020-10-29 03:23:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:49,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:49,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:50,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:50,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:23:50,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:23:50,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-29 03:23:50,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:50,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:50,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:23:50,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:50,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:23:50,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:50,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:50,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:50,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:50,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:50,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:50,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:50,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:50,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:50,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354003817] [2020-10-29 03:23:50,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:50,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:23:50,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034550504] [2020-10-29 03:23:50,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:23:50,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:50,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:23:50,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:23:50,521 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 20 states. [2020-10-29 03:23:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:51,292 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-29 03:23:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:23:51,293 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-29 03:23:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:51,294 INFO L225 Difference]: With dead ends: 57 [2020-10-29 03:23:51,294 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 03:23:51,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:23:51,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 03:23:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-29 03:23:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 03:23:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-29 03:23:51,305 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2020-10-29 03:23:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:51,305 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-29 03:23:51,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:23:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-29 03:23:51,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 03:23:51,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:51,306 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:51,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:23:51,306 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:51,307 INFO L82 PathProgramCache]: Analyzing trace with hash 881122450, now seen corresponding path program 19 times [2020-10-29 03:23:51,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:51,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636049056] [2020-10-29 03:23:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:51,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:51,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:51,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:52,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:52,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:52,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:54,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:55,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:56,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:56,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:23:56,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:23:56,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:23:56,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:56,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 03:23:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 03:23:56,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:58,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:58,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:58,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:58,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:58,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:58,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:58,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:58,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:58,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:58,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:58,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:58,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:58,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636049056] [2020-10-29 03:23:58,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:58,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 03:23:58,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284329580] [2020-10-29 03:23:58,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 03:23:58,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:58,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 03:23:58,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 03:23:58,976 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 38 states. [2020-10-29 03:24:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:01,028 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-10-29 03:24:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 03:24:01,029 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 49 [2020-10-29 03:24:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:01,030 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:24:01,031 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 03:24:01,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=91, Invalid=1549, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:24:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 03:24:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-29 03:24:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 03:24:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-29 03:24:01,044 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 49 [2020-10-29 03:24:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:01,044 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-29 03:24:01,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 03:24:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-29 03:24:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 03:24:01,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:01,046 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:01,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:24:01,047 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1082344468, now seen corresponding path program 20 times [2020-10-29 03:24:01,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:01,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383877488] [2020-10-29 03:24:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:01,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:01,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:01,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:01,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:24:01,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:24:01,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-29 03:24:01,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:01,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:24:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:24:01,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:02,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:02,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:02,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:02,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:02,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:02,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:24:02,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:02,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:02,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:02,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:24:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:02,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383877488] [2020-10-29 03:24:02,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:02,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:24:02,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573966282] [2020-10-29 03:24:02,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:24:02,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:02,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:24:02,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:24:02,143 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 22 states. [2020-10-29 03:24:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:02,823 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-10-29 03:24:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:24:02,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-29 03:24:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:02,828 INFO L225 Difference]: With dead ends: 89 [2020-10-29 03:24:02,828 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 03:24:02,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:24:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 03:24:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-10-29 03:24:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 03:24:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-29 03:24:02,844 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 51 [2020-10-29 03:24:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:02,844 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-29 03:24:02,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:24:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-29 03:24:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 03:24:02,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:02,845 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:02,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:24:02,845 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:02,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:02,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1922315308, now seen corresponding path program 21 times [2020-10-29 03:24:02,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:02,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002908197] [2020-10-29 03:24:02,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:02,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:02,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:03,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:03,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:24:03,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:24:03,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-29 03:24:03,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:03,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:24:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 03:24:03,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:03,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:03,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:03,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:03,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:03,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:03,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:24:03,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:03,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:03,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:03,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:03,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:03,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:24:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:04,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002908197] [2020-10-29 03:24:04,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:04,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:24:04,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206415727] [2020-10-29 03:24:04,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:24:04,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:04,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:24:04,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:24:04,010 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 22 states. [2020-10-29 03:24:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:04,990 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-29 03:24:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 03:24:04,991 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-29 03:24:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:04,992 INFO L225 Difference]: With dead ends: 61 [2020-10-29 03:24:04,992 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 03:24:04,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:24:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 03:24:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-29 03:24:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 03:24:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-29 03:24:05,004 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-10-29 03:24:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:05,004 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-29 03:24:05,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:24:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-29 03:24:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 03:24:05,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:05,005 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:05,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:24:05,005 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:05,006 INFO L82 PathProgramCache]: Analyzing trace with hash -76846378, now seen corresponding path program 22 times [2020-10-29 03:24:05,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:05,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960428605] [2020-10-29 03:24:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:05,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:05,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:05,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:05,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:07,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:08,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:09,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:09,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:10,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:10,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 03:24:10,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:24:10,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 03:24:10,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:10,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 03:24:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 03:24:10,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:13,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:13,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:13,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:13,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:13,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:13,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:13,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:13,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:13,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:13,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960428605] [2020-10-29 03:24:13,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:13,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 03:24:13,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172911477] [2020-10-29 03:24:13,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 03:24:13,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:13,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 03:24:13,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 03:24:13,444 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 42 states. [2020-10-29 03:24:15,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:15,992 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-10-29 03:24:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 03:24:15,993 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 53 [2020-10-29 03:24:15,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:15,994 INFO L225 Difference]: With dead ends: 83 [2020-10-29 03:24:15,994 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 03:24:15,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=99, Invalid=1881, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 03:24:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 03:24:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2020-10-29 03:24:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 03:24:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-29 03:24:16,004 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2020-10-29 03:24:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:16,004 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-29 03:24:16,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 03:24:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-29 03:24:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:24:16,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:16,005 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:16,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:24:16,005 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:16,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:16,006 INFO L82 PathProgramCache]: Analyzing trace with hash -402697896, now seen corresponding path program 23 times [2020-10-29 03:24:16,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:16,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838014280] [2020-10-29 03:24:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:16,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:16,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 03:24:16,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:24:16,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 747 [2020-10-29 03:24:16,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:16,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:24:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:24:16,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:17,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:17,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:17,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:17,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:17,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:17,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:17,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:17,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:17,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:17,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:17,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838014280] [2020-10-29 03:24:17,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:17,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:24:17,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731831561] [2020-10-29 03:24:17,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:24:17,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:17,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:24:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:24:17,186 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 24 states. [2020-10-29 03:24:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:17,891 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-10-29 03:24:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:24:17,892 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-29 03:24:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:17,893 INFO L225 Difference]: With dead ends: 95 [2020-10-29 03:24:17,893 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 03:24:17,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:24:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 03:24:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2020-10-29 03:24:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 03:24:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-29 03:24:17,904 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 55 [2020-10-29 03:24:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:17,904 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-29 03:24:17,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:24:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-29 03:24:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:24:17,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:17,904 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:17,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 03:24:17,905 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:17,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1662719720, now seen corresponding path program 24 times [2020-10-29 03:24:17,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:17,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610334216] [2020-10-29 03:24:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:17,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:17,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:18,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:18,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 03:24:18,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:24:18,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-29 03:24:18,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:18,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:18,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:24:18,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:18,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:24:18,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:19,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:19,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:19,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:19,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:19,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:19,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:19,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:19,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:19,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:19,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:19,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:19,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610334216] [2020-10-29 03:24:19,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:19,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:24:19,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187053196] [2020-10-29 03:24:19,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:24:19,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:19,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:24:19,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:24:19,063 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 24 states. [2020-10-29 03:24:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:20,083 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-29 03:24:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:24:20,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-29 03:24:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:20,085 INFO L225 Difference]: With dead ends: 65 [2020-10-29 03:24:20,085 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:24:20,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=455, Invalid=1525, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 03:24:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:24:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-29 03:24:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 03:24:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-29 03:24:20,095 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2020-10-29 03:24:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:20,095 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-29 03:24:20,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:24:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-29 03:24:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 03:24:20,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:20,096 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:20,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 03:24:20,096 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:20,097 INFO L82 PathProgramCache]: Analyzing trace with hash 286410522, now seen corresponding path program 25 times [2020-10-29 03:24:20,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:20,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709765383] [2020-10-29 03:24:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:20,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:20,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:21,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:21,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:23,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:24,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:25,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:25,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 03:24:25,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:24:25,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:24:25,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:25,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:25,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 03:24:25,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:25,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 03:24:25,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:29,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:29,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:29,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:29,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:29,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:29,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:29,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:29,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:29,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:29,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709765383] [2020-10-29 03:24:29,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:29,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 03:24:29,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495303734] [2020-10-29 03:24:29,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 03:24:29,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:29,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 03:24:29,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 03:24:29,231 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 46 states. [2020-10-29 03:24:32,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:32,338 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-10-29 03:24:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 03:24:32,339 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 57 [2020-10-29 03:24:32,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:32,340 INFO L225 Difference]: With dead ends: 89 [2020-10-29 03:24:32,340 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 03:24:32,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=107, Invalid=2245, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 03:24:32,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 03:24:32,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2020-10-29 03:24:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 03:24:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-29 03:24:32,352 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2020-10-29 03:24:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:32,352 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-29 03:24:32,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 03:24:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-29 03:24:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:24:32,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:32,353 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:32,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 03:24:32,353 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:32,354 INFO L82 PathProgramCache]: Analyzing trace with hash 794832028, now seen corresponding path program 26 times [2020-10-29 03:24:32,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:32,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129602532] [2020-10-29 03:24:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:32,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:32,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:33,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:33,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 03:24:33,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:24:33,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-29 03:24:33,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:33,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:33,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:24:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:33,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:24:33,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:33,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:33,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:33,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:33,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:33,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:33,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:33,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:33,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:33,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:33,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:33,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:33,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:33,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129602532] [2020-10-29 03:24:33,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:33,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:24:33,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613735058] [2020-10-29 03:24:33,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:24:33,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:33,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:24:33,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:24:33,722 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 26 states. [2020-10-29 03:24:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:34,552 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-10-29 03:24:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:24:34,553 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-29 03:24:34,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:34,554 INFO L225 Difference]: With dead ends: 101 [2020-10-29 03:24:34,554 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 03:24:34,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 03:24:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 03:24:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-10-29 03:24:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 03:24:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-29 03:24:34,567 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 59 [2020-10-29 03:24:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:34,567 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-29 03:24:34,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:24:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-29 03:24:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:24:34,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:34,568 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:34,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 03:24:34,568 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:34,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1094636636, now seen corresponding path program 27 times [2020-10-29 03:24:34,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:34,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499807184] [2020-10-29 03:24:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:34,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:34,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:35,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:35,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 03:24:35,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:24:35,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 939 [2020-10-29 03:24:35,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:35,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:24:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 03:24:35,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:36,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:36,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:36,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:36,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:36,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:36,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:36,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:36,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:36,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:36,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:36,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:36,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:36,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499807184] [2020-10-29 03:24:36,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:36,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:24:36,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712882450] [2020-10-29 03:24:36,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:24:36,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:24:36,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:24:36,024 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 26 states. [2020-10-29 03:24:37,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:37,400 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-29 03:24:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 03:24:37,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-29 03:24:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:37,402 INFO L225 Difference]: With dead ends: 69 [2020-10-29 03:24:37,402 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 03:24:37,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=538, Invalid=1814, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 03:24:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 03:24:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-29 03:24:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 03:24:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-29 03:24:37,416 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 59 [2020-10-29 03:24:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:37,416 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-29 03:24:37,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:24:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-29 03:24:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:24:37,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:37,417 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:37,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 03:24:37,417 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash 111047006, now seen corresponding path program 28 times [2020-10-29 03:24:37,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:37,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728607469] [2020-10-29 03:24:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:37,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:37,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:38,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:39,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:40,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:41,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:42,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:42,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:42,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:24:42,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:24:42,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5143 [2020-10-29 03:24:42,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:42,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:42,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-29 03:24:42,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:42,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 03:24:42,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:47,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:47,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:47,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:47,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:47,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:47,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:47,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:47,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:47,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:47,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:47,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:47,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:47,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728607469] [2020-10-29 03:24:47,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:47,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-29 03:24:47,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456976005] [2020-10-29 03:24:47,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-29 03:24:47,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-29 03:24:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2349, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 03:24:47,837 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 50 states. [2020-10-29 03:24:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:51,834 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-10-29 03:24:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-29 03:24:51,836 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 61 [2020-10-29 03:24:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:51,837 INFO L225 Difference]: With dead ends: 95 [2020-10-29 03:24:51,837 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 03:24:51,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=115, Invalid=2641, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 03:24:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 03:24:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2020-10-29 03:24:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 03:24:51,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-29 03:24:51,852 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2020-10-29 03:24:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:51,852 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-29 03:24:51,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-29 03:24:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-29 03:24:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:24:51,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:51,853 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:51,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 03:24:51,853 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:51,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:51,854 INFO L82 PathProgramCache]: Analyzing trace with hash -225782304, now seen corresponding path program 29 times [2020-10-29 03:24:51,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:51,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817437470] [2020-10-29 03:24:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:51,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:51,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:53,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:53,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:24:53,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:24:53,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1365 [2020-10-29 03:24:53,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:53,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:53,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 03:24:53,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:53,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 03:24:53,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:53,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:53,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:53,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:53,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:53,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:53,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:53,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:53,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:53,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:53,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:53,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:53,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:53,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817437470] [2020-10-29 03:24:53,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:53,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 03:24:53,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805862507] [2020-10-29 03:24:53,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 03:24:53,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 03:24:53,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:24:53,886 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 28 states. [2020-10-29 03:24:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:54,835 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-29 03:24:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 03:24:54,836 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-29 03:24:54,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:54,838 INFO L225 Difference]: With dead ends: 107 [2020-10-29 03:24:54,838 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 03:24:54,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:24:54,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 03:24:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-10-29 03:24:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 03:24:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-29 03:24:54,850 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 63 [2020-10-29 03:24:54,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:54,850 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-29 03:24:54,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 03:24:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-29 03:24:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:24:54,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:54,851 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:54,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 03:24:54,852 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:54,852 INFO L82 PathProgramCache]: Analyzing trace with hash 123637152, now seen corresponding path program 30 times [2020-10-29 03:24:54,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:54,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673236742] [2020-10-29 03:24:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:54,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:54,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:55,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:55,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:24:55,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:24:55,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-29 03:24:55,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:55,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:55,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 03:24:55,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:55,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 03:24:55,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:56,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:56,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:56,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:56,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:56,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:56,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:56,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:56,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:56,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:56,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673236742] [2020-10-29 03:24:56,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:56,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 03:24:56,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127127102] [2020-10-29 03:24:56,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 03:24:56,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:56,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 03:24:56,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:24:56,557 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 28 states. [2020-10-29 03:24:58,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:58,106 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-29 03:24:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 03:24:58,108 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-29 03:24:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:58,109 INFO L225 Difference]: With dead ends: 73 [2020-10-29 03:24:58,109 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 03:24:58,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=628, Invalid=2128, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 03:24:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 03:24:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-29 03:24:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 03:24:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-29 03:24:58,126 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2020-10-29 03:24:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:58,126 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-29 03:24:58,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 03:24:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-29 03:24:58,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 03:24:58,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:58,127 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:58,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 03:24:58,128 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:58,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:58,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1011553886, now seen corresponding path program 31 times [2020-10-29 03:24:58,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:58,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973727824] [2020-10-29 03:24:58,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:58,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:58,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:59,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:59,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:00,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:01,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:02,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:03,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:03,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 03:25:03,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:25:03,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:25:03,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:03,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:03,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-29 03:25:03,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:03,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 03:25:03,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:09,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:09,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:09,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:09,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:09,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:09,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:25:09,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:09,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:09,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:09,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:09,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:09,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:25:09,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973727824] [2020-10-29 03:25:09,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:09,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-29 03:25:09,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829189907] [2020-10-29 03:25:09,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-29 03:25:09,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:09,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-29 03:25:09,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 03:25:09,341 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 53 states. [2020-10-29 03:25:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:14,750 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-10-29 03:25:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-29 03:25:14,752 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 65 [2020-10-29 03:25:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:14,753 INFO L225 Difference]: With dead ends: 101 [2020-10-29 03:25:14,753 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 03:25:14,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=119, Invalid=2961, Unknown=0, NotChecked=0, Total=3080 [2020-10-29 03:25:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 03:25:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-29 03:25:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 03:25:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-29 03:25:14,769 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2020-10-29 03:25:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:14,770 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-29 03:25:14,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-29 03:25:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-29 03:25:14,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 03:25:14,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:14,771 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:14,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 03:25:14,771 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:14,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:14,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1008448220, now seen corresponding path program 32 times [2020-10-29 03:25:14,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:14,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704237081] [2020-10-29 03:25:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:14,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:14,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:16,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:16,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 03:25:16,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:25:16,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1239 [2020-10-29 03:25:16,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:16,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:16,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:25:16,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:25:16,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 03:25:16,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:16,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:16,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:16,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:16,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:16,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:16,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:16,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:16,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:16,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:16,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:25:16,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704237081] [2020-10-29 03:25:16,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:16,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 03:25:16,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858181187] [2020-10-29 03:25:16,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 03:25:16,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:16,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 03:25:16,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:25:16,893 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 30 states. [2020-10-29 03:25:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:18,127 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2020-10-29 03:25:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 03:25:18,129 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-29 03:25:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:18,130 INFO L225 Difference]: With dead ends: 113 [2020-10-29 03:25:18,130 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 03:25:18,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=438, Invalid=1454, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 03:25:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 03:25:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-10-29 03:25:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 03:25:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-29 03:25:18,147 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 67 [2020-10-29 03:25:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:18,147 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-29 03:25:18,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 03:25:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-29 03:25:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 03:25:18,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:18,148 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:18,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 03:25:18,148 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:18,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:18,148 INFO L82 PathProgramCache]: Analyzing trace with hash -223800092, now seen corresponding path program 33 times [2020-10-29 03:25:18,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:18,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808373875] [2020-10-29 03:25:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:18,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:18,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:19,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:19,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 03:25:19,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:25:19,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-29 03:25:19,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:19,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:19,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:25:19,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:25:19,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 03:25:19,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:20,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:20,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:20,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:20,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:20,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:20,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:20,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:20,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:20,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:25:20,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808373875] [2020-10-29 03:25:20,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:20,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 03:25:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67933788] [2020-10-29 03:25:20,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 03:25:20,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:20,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 03:25:20,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:25:20,254 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 30 states. [2020-10-29 03:25:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:22,134 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-29 03:25:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 03:25:22,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-29 03:25:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:22,137 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:25:22,137 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 03:25:22,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=725, Invalid=2467, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 03:25:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 03:25:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-29 03:25:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 03:25:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-29 03:25:22,152 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-29 03:25:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:22,152 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-29 03:25:22,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 03:25:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-29 03:25:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 03:25:22,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:22,153 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:22,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 03:25:22,153 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:22,154 INFO L82 PathProgramCache]: Analyzing trace with hash 108703718, now seen corresponding path program 34 times [2020-10-29 03:25:22,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:22,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946558046] [2020-10-29 03:25:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:22,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:22,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:24,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:25,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:26,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:27,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:27,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 03:25:27,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:25:27,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:25:27,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:27,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-29 03:25:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 03:25:27,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:35,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:35,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:35,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:35,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:35,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:35,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:35,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:35,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:35,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:35,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:35,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:35,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:25:35,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946558046] [2020-10-29 03:25:35,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:35,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-29 03:25:35,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589656604] [2020-10-29 03:25:35,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-29 03:25:35,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:35,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-29 03:25:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3189, Unknown=0, NotChecked=0, Total=3306 [2020-10-29 03:25:35,634 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 58 states. [2020-10-29 03:25:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:42,848 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-29 03:25:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-29 03:25:42,850 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 69 [2020-10-29 03:25:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:42,851 INFO L225 Difference]: With dead ends: 107 [2020-10-29 03:25:42,851 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 03:25:42,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=131, Invalid=3529, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 03:25:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 03:25:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2020-10-29 03:25:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 03:25:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-29 03:25:42,871 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2020-10-29 03:25:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:42,871 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-29 03:25:42,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-29 03:25:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-29 03:25:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 03:25:42,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:42,872 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:42,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 03:25:42,872 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:42,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1817285224, now seen corresponding path program 35 times [2020-10-29 03:25:42,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:42,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183443726] [2020-10-29 03:25:42,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:42,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:42,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:44,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:44,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 03:25:44,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:25:44,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1407 [2020-10-29 03:25:44,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:44,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 03:25:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:25:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 03:25:44,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:45,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:45,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:45,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:45,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:45,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:25:45,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:45,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:45,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:45,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:45,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:45,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:25:45,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183443726] [2020-10-29 03:25:45,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:45,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 03:25:45,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644831108] [2020-10-29 03:25:45,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 03:25:45,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:45,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 03:25:45,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:25:45,581 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 32 states. [2020-10-29 03:25:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:46,822 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2020-10-29 03:25:46,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:25:46,825 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-29 03:25:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:46,826 INFO L225 Difference]: With dead ends: 119 [2020-10-29 03:25:46,826 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 03:25:46,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=499, Invalid=1663, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 03:25:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 03:25:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2020-10-29 03:25:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 03:25:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-29 03:25:46,840 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 71 [2020-10-29 03:25:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:46,840 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-29 03:25:46,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 03:25:46,841 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-29 03:25:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 03:25:46,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:46,841 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:46,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 03:25:46,841 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:46,842 INFO L82 PathProgramCache]: Analyzing trace with hash -50107864, now seen corresponding path program 36 times [2020-10-29 03:25:46,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:46,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949128008] [2020-10-29 03:25:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:46,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:46,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:48,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:48,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 03:25:48,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:25:48,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1263 [2020-10-29 03:25:48,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:48,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 03:25:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:25:48,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 03:25:48,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:49,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:49,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:49,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:49,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:49,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:49,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:49,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:49,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:49,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:49,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:49,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:49,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:25:49,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949128008] [2020-10-29 03:25:49,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:49,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 03:25:49,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57533644] [2020-10-29 03:25:49,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 03:25:49,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:49,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 03:25:49,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:25:49,120 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 32 states. [2020-10-29 03:25:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:51,641 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-29 03:25:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 03:25:51,642 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-29 03:25:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:51,643 INFO L225 Difference]: With dead ends: 81 [2020-10-29 03:25:51,643 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 03:25:51,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=829, Invalid=2831, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 03:25:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 03:25:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-29 03:25:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 03:25:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-29 03:25:51,658 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2020-10-29 03:25:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:51,659 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-29 03:25:51,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 03:25:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-29 03:25:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 03:25:51,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:51,660 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:51,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 03:25:51,660 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash -476789718, now seen corresponding path program 37 times [2020-10-29 03:25:51,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:51,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729629885] [2020-10-29 03:25:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:51,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:51,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:52,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:54,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:55,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:56,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:57,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:57,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 03:25:57,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:25:57,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5482 [2020-10-29 03:25:57,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:57,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:57,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-29 03:25:57,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:57,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 03:25:57,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:08,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:08,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:08,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:08,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:08,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:08,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:26:08,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:08,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:08,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:26:09,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729629885] [2020-10-29 03:26:09,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:09,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-29 03:26:09,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879690290] [2020-10-29 03:26:09,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-29 03:26:09,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:09,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-29 03:26:09,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 03:26:09,012 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 61 states. [2020-10-29 03:26:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:26:21,661 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2020-10-29 03:26:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-29 03:26:21,664 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 73 [2020-10-29 03:26:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:26:21,666 INFO L225 Difference]: With dead ends: 113 [2020-10-29 03:26:21,666 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 03:26:21,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=135, Invalid=3897, Unknown=0, NotChecked=0, Total=4032 [2020-10-29 03:26:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 03:26:21,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-29 03:26:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 03:26:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-10-29 03:26:21,685 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2020-10-29 03:26:21,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:26:21,686 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-10-29 03:26:21,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-29 03:26:21,686 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-10-29 03:26:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 03:26:21,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:21,687 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:21,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 03:26:21,687 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:21,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1798809004, now seen corresponding path program 38 times [2020-10-29 03:26:21,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:21,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76749883] [2020-10-29 03:26:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:21,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:21,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:23,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:23,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 03:26:23,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:26:23,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1968 [2020-10-29 03:26:23,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:23,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:23,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 03:26:23,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:26:23,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 03:26:23,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:25,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:25,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:25,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:25,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:25,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:25,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:26:25,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:25,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:25,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:26:25,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76749883] [2020-10-29 03:26:25,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:25,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 03:26:25,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756644863] [2020-10-29 03:26:25,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 03:26:25,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:25,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 03:26:25,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:26:25,348 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 34 states. [2020-10-29 03:26:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:26:27,675 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2020-10-29 03:26:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 03:26:27,678 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-29 03:26:27,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:26:27,680 INFO L225 Difference]: With dead ends: 125 [2020-10-29 03:26:27,680 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:26:27,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=564, Invalid=1886, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 03:26:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:26:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-10-29 03:26:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 03:26:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-29 03:26:27,704 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 75 [2020-10-29 03:26:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:26:27,704 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-29 03:26:27,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 03:26:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-29 03:26:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 03:26:27,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:27,705 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:27,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 03:26:27,706 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:27,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:27,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1764586132, now seen corresponding path program 39 times [2020-10-29 03:26:27,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:27,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470718753] [2020-10-29 03:26:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:27,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:27,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:29,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:29,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 03:26:29,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:26:29,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1827 [2020-10-29 03:26:29,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:29,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:29,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 03:26:29,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:26:29,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 03:26:29,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:31,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:31,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:31,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:31,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:31,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:31,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:26:31,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:31,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:31,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:31,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:31,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:31,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:26:31,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470718753] [2020-10-29 03:26:31,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:31,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 03:26:31,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500481015] [2020-10-29 03:26:31,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 03:26:31,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 03:26:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:26:31,235 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 34 states. [2020-10-29 03:26:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:26:35,847 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-29 03:26:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 03:26:35,851 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-29 03:26:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:26:35,852 INFO L225 Difference]: With dead ends: 85 [2020-10-29 03:26:35,852 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 03:26:35,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=940, Invalid=3220, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 03:26:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 03:26:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-29 03:26:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 03:26:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-29 03:26:35,877 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2020-10-29 03:26:35,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:26:35,878 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-29 03:26:35,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 03:26:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-29 03:26:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 03:26:35,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:35,879 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:35,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 03:26:35,879 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:35,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1177036398, now seen corresponding path program 40 times [2020-10-29 03:26:35,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:35,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925221626] [2020-10-29 03:26:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:35,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:35,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:37,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:39,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:40,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:41,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:41,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 03:26:41,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:26:41,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5254 [2020-10-29 03:26:41,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:41,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-29 03:26:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:26:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 03:26:41,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:41,525 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 14 [2020-10-29 03:26:41,674 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20