/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-new/nested-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:05:05,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:05:05,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:05:05,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:05:05,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:05:05,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:05:05,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:05:05,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:05:05,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:05:05,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:05:05,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:05:05,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:05:05,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:05:05,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:05:05,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:05:05,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:05:05,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:05:05,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:05:05,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:05:05,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:05:05,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:05:05,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:05:05,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:05:05,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:05:05,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:05:05,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:05:05,505 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:05:05,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:05:05,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:05:05,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:05:05,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:05:05,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:05:05,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:05:05,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:05:05,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:05:05,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:05:05,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:05:05,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:05:05,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:05:05,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:05:05,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:05:05,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:05:05,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:05:05,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:05:05,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:05:05,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:05:05,585 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:05:05,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:05:05,586 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:05:05,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:05:05,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:05:05,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:05:05,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:05:05,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:05:05,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:05:05,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:05:05,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:05:05,589 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:05:05,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:05:05,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:05:05,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:05:05,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:05:05,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:05:05,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:05:05,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:05:05,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:05:05,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:05:05,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:05:05,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:05:05,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:05:05,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:05:05,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:05:06,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:05:06,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:05:06,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:05:06,084 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:05:06,085 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:05:06,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/nested-1.i [2020-10-28 15:05:06,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd3116112/5c32b5dd11a249249220839b99b6c3b7/FLAG27a4453f7 [2020-10-28 15:05:06,804 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:05:06,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/nested-1.i [2020-10-28 15:05:06,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd3116112/5c32b5dd11a249249220839b99b6c3b7/FLAG27a4453f7 [2020-10-28 15:05:07,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd3116112/5c32b5dd11a249249220839b99b6c3b7 [2020-10-28 15:05:07,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:05:07,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:05:07,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:05:07,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:05:07,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:05:07,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:05:07" (1/1) ... [2020-10-28 15:05:07,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d5ba39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07, skipping insertion in model container [2020-10-28 15:05:07,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:05:07" (1/1) ... [2020-10-28 15:05:07,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:05:07,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:05:07,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:05:07,372 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:05:07,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:05:07,411 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:05:07,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07 WrapperNode [2020-10-28 15:05:07,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:05:07,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:05:07,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:05:07,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:05:07,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07" (1/1) ... [2020-10-28 15:05:07,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07" (1/1) ... [2020-10-28 15:05:07,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07" (1/1) ... [2020-10-28 15:05:07,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07" (1/1) ... [2020-10-28 15:05:07,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07" (1/1) ... [2020-10-28 15:05:07,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07" (1/1) ... [2020-10-28 15:05:07,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07" (1/1) ... [2020-10-28 15:05:07,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:05:07,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:05:07,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:05:07,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:05:07,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:05:07,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:05:07,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:05:07,541 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:05:07,541 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:05:07,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:05:07,542 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:05:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:05:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:05:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:05:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:05:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:05:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:05:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:05:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:05:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:05:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:05:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:05:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:05:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:05:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:05:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:05:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:05:07,959 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:05:07,959 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 15:05:07,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:05:07 BoogieIcfgContainer [2020-10-28 15:05:07,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:05:07,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:05:07,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:05:07,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:05:07,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:05:07" (1/3) ... [2020-10-28 15:05:07,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3a5e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:05:07, skipping insertion in model container [2020-10-28 15:05:07,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:07" (2/3) ... [2020-10-28 15:05:07,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3a5e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:05:07, skipping insertion in model container [2020-10-28 15:05:07,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:05:07" (3/3) ... [2020-10-28 15:05:07,978 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-1.i [2020-10-28 15:05:07,992 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:05:08,002 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:05:08,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:05:08,058 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:05:08,058 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:05:08,059 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:05:08,059 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:05:08,059 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:05:08,060 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:05:08,060 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:05:08,060 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:05:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 15:05:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:05:08,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:08,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:08,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:08,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1750518697, now seen corresponding path program 1 times [2020-10-28 15:05:08,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:08,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841216057] [2020-10-28 15:05:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:08,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:08,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:08,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:05:08,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:08,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-28 15:05:08,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:08,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:05:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:08,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 15:05:08,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:08,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:08,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:08,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:08,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:08,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 15:05:08,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:08,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:08,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:08,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:08,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:08,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:08,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841216057] [2020-10-28 15:05:08,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:05:08,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:05:08,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851705776] [2020-10-28 15:05:08,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:05:08,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:08,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:05:08,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:05:08,743 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 15:05:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:08,804 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-10-28 15:05:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:05:08,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 15:05:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:08,814 INFO L225 Difference]: With dead ends: 47 [2020-10-28 15:05:08,814 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:05:08,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:05:08,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:05:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:05:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:05:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-28 15:05:08,861 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-10-28 15:05:08,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:08,861 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-28 15:05:08,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:05:08,862 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-28 15:05:08,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:05:08,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:08,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:08,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:05:08,863 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:08,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1339645673, now seen corresponding path program 1 times [2020-10-28 15:05:08,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:08,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109249802] [2020-10-28 15:05:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:08,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:09,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:09,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:05:09,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:09,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-28 15:05:09,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:09,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:09,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:05:09,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:09,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:05:09,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:09,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:09,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:09,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:09,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:09,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:09,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:05:09,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:09,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:09,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:09,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:09,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:09,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:09,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109249802] [2020-10-28 15:05:09,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:05:09,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:05:09,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116811910] [2020-10-28 15:05:09,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:05:09,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:09,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:05:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:05:09,124 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-28 15:05:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:09,247 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-28 15:05:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:05:09,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 15:05:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:09,249 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:05:09,249 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 15:05:09,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:09,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 15:05:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-10-28 15:05:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:05:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-28 15:05:09,260 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-28 15:05:09,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:09,260 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-28 15:05:09,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:05:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-28 15:05:09,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:05:09,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:09,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:09,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:05:09,262 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2045551290, now seen corresponding path program 1 times [2020-10-28 15:05:09,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:09,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214423879] [2020-10-28 15:05:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:09,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:09,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:09,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:09,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:05:09,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:09,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-28 15:05:09,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:09,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:09,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:05:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:05:09,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:09,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:09,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:09,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:09,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:09,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:09,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:05:09,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:09,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:09,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:09,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:09,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:09,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:09,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214423879] [2020-10-28 15:05:09,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:09,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:05:09,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914517682] [2020-10-28 15:05:09,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:05:09,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:05:09,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:05:09,744 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-28 15:05:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:09,965 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-28 15:05:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:05:09,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:05:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:09,967 INFO L225 Difference]: With dead ends: 34 [2020-10-28 15:05:09,967 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:05:09,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:05:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-28 15:05:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:05:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-28 15:05:09,978 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-10-28 15:05:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:09,979 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-28 15:05:09,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:05:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-28 15:05:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:05:09,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:09,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:09,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:05:09,981 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash 775061175, now seen corresponding path program 2 times [2020-10-28 15:05:09,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:09,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061133552] [2020-10-28 15:05:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:09,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:10,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:05:10,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:05:10,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-28 15:05:10,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:10,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:05:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:05:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:05:10,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:10,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:10,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:10,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:10,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:10,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:05:10,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:10,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:05:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:05:10,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061133552] [2020-10-28 15:05:10,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:10,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:05:10,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382794294] [2020-10-28 15:05:10,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:05:10,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:10,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:05:10,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:05:10,610 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-28 15:05:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:10,735 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-28 15:05:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:05:10,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 15:05:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:10,737 INFO L225 Difference]: With dead ends: 41 [2020-10-28 15:05:10,737 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 15:05:10,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:10,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 15:05:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-28 15:05:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:05:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-28 15:05:10,746 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-10-28 15:05:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:10,747 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-28 15:05:10,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:05:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-28 15:05:10,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:05:10,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:10,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:10,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:05:10,749 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:10,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:10,749 INFO L82 PathProgramCache]: Analyzing trace with hash -150752969, now seen corresponding path program 1 times [2020-10-28 15:05:10,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:10,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816328486] [2020-10-28 15:05:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:10,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:11,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:11,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:05:11,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:05:11,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-28 15:05:11,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:11,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:05:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:05:11,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:11,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:11,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:11,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:11,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:11,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:11,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:11,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:11,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:11,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:11,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:11,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:11,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:05:11,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816328486] [2020-10-28 15:05:11,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:11,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:05:11,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463562335] [2020-10-28 15:05:11,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:05:11,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:11,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:05:11,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:11,736 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-28 15:05:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:11,979 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-28 15:05:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:05:11,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-28 15:05:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:11,981 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:05:11,982 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 15:05:11,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:05:11,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 15:05:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-28 15:05:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:05:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 15:05:12,000 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 25 [2020-10-28 15:05:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:12,000 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 15:05:12,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:05:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 15:05:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:05:12,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:12,004 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:12,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:05:12,005 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:12,006 INFO L82 PathProgramCache]: Analyzing trace with hash 927554436, now seen corresponding path program 2 times [2020-10-28 15:05:12,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:12,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253828434] [2020-10-28 15:05:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:12,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:12,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:12,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:15,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:15,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:05:15,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:05:15,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3139 [2020-10-28 15:05:15,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:15,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:15,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:05:15,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:15,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:05:15,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:15,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:15,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:15,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:15,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:15,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:15,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:05:15,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:15,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:15,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:05:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:05:15,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253828434] [2020-10-28 15:05:15,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:15,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:05:15,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672917781] [2020-10-28 15:05:15,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:05:15,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:15,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:05:15,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:05:15,282 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 8 states. [2020-10-28 15:05:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:15,515 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-28 15:05:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:05:15,515 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-28 15:05:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:15,517 INFO L225 Difference]: With dead ends: 47 [2020-10-28 15:05:15,517 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 15:05:15,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:05:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 15:05:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-28 15:05:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:05:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-28 15:05:15,527 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2020-10-28 15:05:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:15,528 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-28 15:05:15,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:05:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-28 15:05:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:05:15,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:15,529 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:15,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:05:15,529 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash -178054825, now seen corresponding path program 3 times [2020-10-28 15:05:15,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:15,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932392941] [2020-10-28 15:05:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:15,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:15,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:15,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:15,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:15,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:20,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:20,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:05:20,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:05:20,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:05:20,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:20,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:20,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:05:20,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:05:20,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:05:20,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:20,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:20,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:20,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:20,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:20,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:20,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:20,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:20,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:20,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:20,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:20,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:20,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 15:05:20,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932392941] [2020-10-28 15:05:20,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:20,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:05:20,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206090102] [2020-10-28 15:05:20,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:05:20,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:20,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:05:20,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:05:20,618 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 6 states. [2020-10-28 15:05:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:20,815 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-28 15:05:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:05:20,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-28 15:05:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:20,817 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:05:20,818 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:05:20,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:05:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-28 15:05:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:05:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-28 15:05:20,843 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2020-10-28 15:05:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:20,843 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-28 15:05:20,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:05:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-28 15:05:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:05:20,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:20,847 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:20,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:05:20,848 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:20,848 INFO L82 PathProgramCache]: Analyzing trace with hash -848524201, now seen corresponding path program 4 times [2020-10-28 15:05:20,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:20,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355828661] [2020-10-28 15:05:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:20,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:20,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:20,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:20,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:21,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:25,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:25,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 15:05:25,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:05:25,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:05:25,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:25,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:25,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:05:25,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:25,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:05:25,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:25,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:25,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:25,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:25,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:25,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:25,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:25,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:25,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:25,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:25,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:25,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:25,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:05:25,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355828661] [2020-10-28 15:05:25,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:25,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:05:25,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703544745] [2020-10-28 15:05:25,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:05:25,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:25,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:05:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:25,975 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-10-28 15:05:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:26,256 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-28 15:05:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:05:26,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-28 15:05:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:26,259 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:05:26,259 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:05:26,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:05:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:05:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-10-28 15:05:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:05:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-28 15:05:26,283 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 43 [2020-10-28 15:05:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:26,284 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-28 15:05:26,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:05:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-28 15:05:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:05:26,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:26,294 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:26,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:05:26,295 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:26,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1246683326, now seen corresponding path program 5 times [2020-10-28 15:05:26,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:26,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021409396] [2020-10-28 15:05:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:26,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:26,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:26,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:26,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:26,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:31,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 15:05:31,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:05:31,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:05:31,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:31,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:05:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:05:31,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:31,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:31,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:31,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:31,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:31,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:31,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:31,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:31,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:05:31,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021409396] [2020-10-28 15:05:31,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:31,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:05:31,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624944077] [2020-10-28 15:05:31,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:05:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:31,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:05:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:05:31,477 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 10 states. [2020-10-28 15:05:31,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:31,864 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-10-28 15:05:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:05:31,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-28 15:05:31,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:31,866 INFO L225 Difference]: With dead ends: 71 [2020-10-28 15:05:31,866 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 15:05:31,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:05:31,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 15:05:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-28 15:05:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 15:05:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-28 15:05:31,886 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 50 [2020-10-28 15:05:31,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:31,886 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-28 15:05:31,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:05:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-28 15:05:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 15:05:31,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:31,890 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:31,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:05:31,891 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:31,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2143781385, now seen corresponding path program 6 times [2020-10-28 15:05:31,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:31,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672591952] [2020-10-28 15:05:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:31,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:32,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:36,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 15:05:36,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:05:36,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:05:36,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:36,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:36,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:05:36,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:05:36,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:05:36,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:37,145 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-28 15:05:37,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:37,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:37,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:37,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:37,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:37,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:37,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:37,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:37,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:37,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:37,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:37,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 11 proven. 69 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-28 15:05:37,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672591952] [2020-10-28 15:05:37,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:37,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:05:37,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236001027] [2020-10-28 15:05:37,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:05:37,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:37,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:05:37,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:37,168 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 7 states. [2020-10-28 15:05:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:37,359 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2020-10-28 15:05:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:05:37,360 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-28 15:05:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:37,361 INFO L225 Difference]: With dead ends: 120 [2020-10-28 15:05:37,361 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 15:05:37,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:05:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 15:05:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-10-28 15:05:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 15:05:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-28 15:05:37,377 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 57 [2020-10-28 15:05:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:37,378 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-28 15:05:37,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:05:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-28 15:05:37,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 15:05:37,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:37,379 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:37,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:05:37,379 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:37,380 INFO L82 PathProgramCache]: Analyzing trace with hash 871219063, now seen corresponding path program 7 times [2020-10-28 15:05:37,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:37,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385261960] [2020-10-28 15:05:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:37,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:37,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:37,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:37,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:37,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:41,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:42,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:42,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 15:05:42,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:05:42,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:05:42,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:42,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:05:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 15:05:42,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:42,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:42,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:42,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:42,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:42,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:42,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:42,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:42,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 411 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-28 15:05:42,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385261960] [2020-10-28 15:05:42,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:42,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:05:42,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669725642] [2020-10-28 15:05:42,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:05:42,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:42,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:05:42,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:05:42,558 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 11 states. [2020-10-28 15:05:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:42,986 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-28 15:05:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:05:42,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 15:05:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:42,988 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:05:42,988 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:05:42,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:05:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:05:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-28 15:05:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 15:05:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-28 15:05:43,016 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 69 [2020-10-28 15:05:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:43,018 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-28 15:05:43,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:05:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-28 15:05:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 15:05:43,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:43,025 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:43,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:05:43,026 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2087508864, now seen corresponding path program 8 times [2020-10-28 15:05:43,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:43,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489123342] [2020-10-28 15:05:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:43,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:44,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:48,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:48,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 15:05:48,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:05:48,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:05:48,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:48,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:48,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:05:48,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:05:48,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 15:05:48,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:48,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:48,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:48,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:48,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:48,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:48,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:48,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:48,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:48,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:48,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 172 proven. 134 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-10-28 15:05:48,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489123342] [2020-10-28 15:05:48,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:48,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:05:48,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739013090] [2020-10-28 15:05:48,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:05:48,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:48,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:05:48,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:05:48,154 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 8 states. [2020-10-28 15:05:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:48,420 INFO L93 Difference]: Finished difference Result 163 states and 183 transitions. [2020-10-28 15:05:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:05:48,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-28 15:05:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:48,422 INFO L225 Difference]: With dead ends: 163 [2020-10-28 15:05:48,422 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 15:05:48,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:05:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 15:05:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2020-10-28 15:05:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 15:05:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-10-28 15:05:48,440 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 78 [2020-10-28 15:05:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:48,441 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-10-28 15:05:48,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:05:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-10-28 15:05:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 15:05:48,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:48,442 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:48,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:05:48,442 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash -856915746, now seen corresponding path program 9 times [2020-10-28 15:05:48,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:48,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002846328] [2020-10-28 15:05:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:48,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:48,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:48,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:48,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:48,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:50,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:53,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:53,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 15:05:53,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:05:53,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:05:53,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:53,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:53,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:05:53,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:05:53,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 15:05:53,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:53,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:53,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:53,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:53,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:53,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:53,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:53,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:53,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:53,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 268 proven. 221 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-10-28 15:05:53,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002846328] [2020-10-28 15:05:53,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:53,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:05:53,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681803500] [2020-10-28 15:05:53,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:05:53,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:53,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:05:53,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:53,589 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 9 states. [2020-10-28 15:05:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:53,870 INFO L93 Difference]: Finished difference Result 189 states and 209 transitions. [2020-10-28 15:05:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:05:53,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 92 [2020-10-28 15:05:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:53,872 INFO L225 Difference]: With dead ends: 189 [2020-10-28 15:05:53,872 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 15:05:53,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:05:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 15:05:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2020-10-28 15:05:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 15:05:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2020-10-28 15:05:53,902 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 92 [2020-10-28 15:05:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:53,902 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2020-10-28 15:05:53,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:05:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2020-10-28 15:05:53,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 15:05:53,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:53,911 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:53,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:05:53,911 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:53,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1235752516, now seen corresponding path program 10 times [2020-10-28 15:05:53,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:53,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570662200] [2020-10-28 15:05:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:53,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:53,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:53,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:54,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:58,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 15:05:58,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:05:58,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:05:58,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:58,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:58,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:05:58,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:05:58,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 15:05:58,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:59,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:59,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:59,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:59,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:59,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:59,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:59,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:59,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:59,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:59,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:59,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1505 backedges. 388 proven. 330 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2020-10-28 15:05:59,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570662200] [2020-10-28 15:05:59,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:59,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:05:59,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146113186] [2020-10-28 15:05:59,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:05:59,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:59,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:05:59,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:05:59,084 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 10 states. [2020-10-28 15:05:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:59,379 INFO L93 Difference]: Finished difference Result 215 states and 235 transitions. [2020-10-28 15:05:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:05:59,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-10-28 15:05:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:59,381 INFO L225 Difference]: With dead ends: 215 [2020-10-28 15:05:59,381 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 15:05:59,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:05:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 15:05:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2020-10-28 15:05:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 15:05:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2020-10-28 15:05:59,403 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 106 [2020-10-28 15:05:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:59,404 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2020-10-28 15:05:59,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:05:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2020-10-28 15:05:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 15:05:59,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:59,406 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:59,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:05:59,406 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:59,407 INFO L82 PathProgramCache]: Analyzing trace with hash 759166490, now seen corresponding path program 11 times [2020-10-28 15:05:59,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:59,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525076464] [2020-10-28 15:05:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:59,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:04,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:04,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 15:06:04,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:06:04,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 15:06:04,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:04,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:04,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:06:04,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:06:04,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 15:06:04,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:04,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:04,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:04,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:04,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:04,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:04,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:06:04,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:04,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:04,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:04,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:04,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:04,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2086 backedges. 877 proven. 376 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2020-10-28 15:06:04,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525076464] [2020-10-28 15:06:04,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:04,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:04,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786815789] [2020-10-28 15:06:04,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:04,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:04,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:04,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:04,586 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 11 states. [2020-10-28 15:06:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:04,985 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2020-10-28 15:06:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:06:04,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 120 [2020-10-28 15:06:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:04,987 INFO L225 Difference]: With dead ends: 241 [2020-10-28 15:06:04,987 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 15:06:04,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:06:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 15:06:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2020-10-28 15:06:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 15:06:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 142 transitions. [2020-10-28 15:06:05,014 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 142 transitions. Word has length 120 [2020-10-28 15:06:05,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:05,014 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 142 transitions. [2020-10-28 15:06:05,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 142 transitions. [2020-10-28 15:06:05,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-28 15:06:05,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:05,016 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:05,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:06:05,016 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:05,017 INFO L82 PathProgramCache]: Analyzing trace with hash 74286584, now seen corresponding path program 12 times [2020-10-28 15:06:05,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:05,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902761581] [2020-10-28 15:06:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:10,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 15:06:10,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:06:10,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:06:10,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:10,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:10,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:10,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:06:10,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 15:06:10,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:10,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:10,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:10,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:10,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:10,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:10,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:10,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:10,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:10,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:10,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:10,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2765 backedges. 1157 proven. 501 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-10-28 15:06:10,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902761581] [2020-10-28 15:06:10,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:10,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:10,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850403180] [2020-10-28 15:06:10,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:10,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:10,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:10,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:10,202 INFO L87 Difference]: Start difference. First operand 135 states and 142 transitions. Second operand 12 states. [2020-10-28 15:06:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:10,681 INFO L93 Difference]: Finished difference Result 267 states and 287 transitions. [2020-10-28 15:06:10,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:06:10,683 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 134 [2020-10-28 15:06:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:10,684 INFO L225 Difference]: With dead ends: 267 [2020-10-28 15:06:10,685 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 15:06:10,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:06:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 15:06:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2020-10-28 15:06:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 15:06:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 156 transitions. [2020-10-28 15:06:10,709 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 156 transitions. Word has length 134 [2020-10-28 15:06:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:10,709 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 156 transitions. [2020-10-28 15:06:10,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 156 transitions. [2020-10-28 15:06:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-28 15:06:10,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:10,711 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:10,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:06:10,711 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash -622757546, now seen corresponding path program 13 times [2020-10-28 15:06:10,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:10,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925968053] [2020-10-28 15:06:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:10,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:15,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:15,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-28 15:06:15,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:06:15,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 15:06:15,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:15,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:15,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:15,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:06:15,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 15:06:15,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:15,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:15,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:15,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:15,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:15,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:15,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:15,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:15,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:15,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:15,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:15,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:15,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3542 backedges. 1477 proven. 644 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2020-10-28 15:06:15,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925968053] [2020-10-28 15:06:15,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:15,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:15,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966669940] [2020-10-28 15:06:15,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:15,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:15,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:15,934 INFO L87 Difference]: Start difference. First operand 149 states and 156 transitions. Second operand 13 states. [2020-10-28 15:06:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:16,416 INFO L93 Difference]: Finished difference Result 293 states and 313 transitions. [2020-10-28 15:06:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:16,416 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-10-28 15:06:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:16,418 INFO L225 Difference]: With dead ends: 293 [2020-10-28 15:06:16,418 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 15:06:16,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:06:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 15:06:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2020-10-28 15:06:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-28 15:06:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 170 transitions. [2020-10-28 15:06:16,442 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 170 transitions. Word has length 148 [2020-10-28 15:06:16,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:16,442 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 170 transitions. [2020-10-28 15:06:16,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 170 transitions. [2020-10-28 15:06:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-28 15:06:16,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:16,444 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:16,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:06:16,444 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1982549964, now seen corresponding path program 14 times [2020-10-28 15:06:16,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:16,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542289663] [2020-10-28 15:06:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:16,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:16,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:16,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:21,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-28 15:06:21,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:06:21,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:06:21,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:21,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:06:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 15:06:21,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:21,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:21,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:21,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:21,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:21,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:21,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:21,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:21,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:21,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:21,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:21,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:21,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4417 backedges. 1837 proven. 805 refuted. 0 times theorem prover too weak. 1775 trivial. 0 not checked. [2020-10-28 15:06:21,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542289663] [2020-10-28 15:06:21,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:21,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:06:21,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275950622] [2020-10-28 15:06:21,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:06:21,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:21,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:06:21,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:21,666 INFO L87 Difference]: Start difference. First operand 163 states and 170 transitions. Second operand 14 states. [2020-10-28 15:06:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:22,270 INFO L93 Difference]: Finished difference Result 312 states and 332 transitions. [2020-10-28 15:06:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:06:22,271 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 162 [2020-10-28 15:06:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:22,274 INFO L225 Difference]: With dead ends: 312 [2020-10-28 15:06:22,274 INFO L226 Difference]: Without dead ends: 177 [2020-10-28 15:06:22,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:06:22,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-28 15:06:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-10-28 15:06:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-28 15:06:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 184 transitions. [2020-10-28 15:06:22,299 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 184 transitions. Word has length 162 [2020-10-28 15:06:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:22,300 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 184 transitions. [2020-10-28 15:06:22,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:06:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 184 transitions. [2020-10-28 15:06:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-28 15:06:22,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:22,302 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:22,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:06:22,302 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:22,304 INFO L82 PathProgramCache]: Analyzing trace with hash 314051218, now seen corresponding path program 15 times [2020-10-28 15:06:22,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:22,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956451686] [2020-10-28 15:06:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:22,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-28 15:06:22,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:22,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-28 15:06:22,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-28 15:06:22,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:23,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:23,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:23,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:23,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:23,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:23,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:23,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:23,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:23,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:23,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:23,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:23,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2020-10-28 15:06:23,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956451686] [2020-10-28 15:06:23,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:23,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:23,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833740585] [2020-10-28 15:06:23,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:23,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:23,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:23,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:23,099 INFO L87 Difference]: Start difference. First operand 177 states and 184 transitions. Second operand 12 states. [2020-10-28 15:06:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:23,614 INFO L93 Difference]: Finished difference Result 229 states and 238 transitions. [2020-10-28 15:06:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:06:23,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 176 [2020-10-28 15:06:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:23,616 INFO L225 Difference]: With dead ends: 229 [2020-10-28 15:06:23,616 INFO L226 Difference]: Without dead ends: 222 [2020-10-28 15:06:23,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:06:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-28 15:06:23,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 200. [2020-10-28 15:06:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 15:06:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 208 transitions. [2020-10-28 15:06:23,643 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 208 transitions. Word has length 176 [2020-10-28 15:06:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:23,644 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 208 transitions. [2020-10-28 15:06:23,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 208 transitions. [2020-10-28 15:06:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-28 15:06:23,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:23,646 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:23,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:06:23,646 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:23,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:23,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1757525911, now seen corresponding path program 16 times [2020-10-28 15:06:23,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:23,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057850417] [2020-10-28 15:06:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:23,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:24,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-28 15:06:24,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:24,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-28 15:06:24,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:24,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:24,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 187 [2020-10-28 15:06:24,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:24,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:24,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:24,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:24,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:24,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:24,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:24,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:24,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-28 15:06:24,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057850417] [2020-10-28 15:06:24,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:24,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:24,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548931844] [2020-10-28 15:06:24,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:24,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:24,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:24,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:24,613 INFO L87 Difference]: Start difference. First operand 200 states and 208 transitions. Second operand 13 states. [2020-10-28 15:06:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:25,151 INFO L93 Difference]: Finished difference Result 252 states and 262 transitions. [2020-10-28 15:06:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:25,151 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 199 [2020-10-28 15:06:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:25,153 INFO L225 Difference]: With dead ends: 252 [2020-10-28 15:06:25,153 INFO L226 Difference]: Without dead ends: 245 [2020-10-28 15:06:25,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:06:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-28 15:06:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 223. [2020-10-28 15:06:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-28 15:06:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 232 transitions. [2020-10-28 15:06:25,183 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 232 transitions. Word has length 199 [2020-10-28 15:06:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:25,183 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 232 transitions. [2020-10-28 15:06:25,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 232 transitions. [2020-10-28 15:06:25,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-28 15:06:25,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:25,186 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:25,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:06:25,186 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:25,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1378694386, now seen corresponding path program 17 times [2020-10-28 15:06:25,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:25,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077187802] [2020-10-28 15:06:25,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:26,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:26,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 15:06:26,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:26,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 911 [2020-10-28 15:06:26,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:26,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:26,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:26,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:26,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-28 15:06:26,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:26,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:26,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:26,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:26,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:26,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:26,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:26,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:26,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:26,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:26,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:26,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:26,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-28 15:06:26,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077187802] [2020-10-28 15:06:26,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:26,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:06:26,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548390011] [2020-10-28 15:06:26,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:06:26,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:26,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:06:26,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:26,400 INFO L87 Difference]: Start difference. First operand 223 states and 232 transitions. Second operand 14 states. [2020-10-28 15:06:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:27,035 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2020-10-28 15:06:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:06:27,035 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 222 [2020-10-28 15:06:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:27,038 INFO L225 Difference]: With dead ends: 253 [2020-10-28 15:06:27,038 INFO L226 Difference]: Without dead ends: 246 [2020-10-28 15:06:27,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:06:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-28 15:06:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2020-10-28 15:06:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-28 15:06:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 256 transitions. [2020-10-28 15:06:27,073 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 256 transitions. Word has length 222 [2020-10-28 15:06:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:27,074 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 256 transitions. [2020-10-28 15:06:27,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:06:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 256 transitions. [2020-10-28 15:06:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-28 15:06:27,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:27,075 INFO L422 BasicCegarLoop]: trace histogram [100, 100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:27,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:06:27,076 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:27,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1471340855, now seen corresponding path program 18 times [2020-10-28 15:06:27,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:27,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679763681] [2020-10-28 15:06:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:27,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:32,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:32,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-28 15:06:32,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:32,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 15:06:32,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:32,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:32,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 104 [2020-10-28 15:06:32,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:32,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 239 [2020-10-28 15:06:32,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:39,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:39,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:39,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:39,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:39,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:39,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:39,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:39,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:39,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11045 backedges. 11036 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:06:39,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679763681] [2020-10-28 15:06:39,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:06:39,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2020-10-28 15:06:39,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835836675] [2020-10-28 15:06:39,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-10-28 15:06:39,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:39,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-10-28 15:06:39,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5259, Invalid=5871, Unknown=0, NotChecked=0, Total=11130 [2020-10-28 15:06:39,923 INFO L87 Difference]: Start difference. First operand 246 states and 256 transitions. Second operand 106 states. [2020-10-28 15:06:50,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:50,611 INFO L93 Difference]: Finished difference Result 9786 states and 10246 transitions. [2020-10-28 15:06:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-28 15:06:50,612 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 245 [2020-10-28 15:06:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:50,613 INFO L225 Difference]: With dead ends: 9786 [2020-10-28 15:06:50,613 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 15:06:50,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5652 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=15773, Invalid=27699, Unknown=0, NotChecked=0, Total=43472 [2020-10-28 15:06:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 15:06:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 15:06:50,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 15:06:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 15:06:50,643 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 245 [2020-10-28 15:06:50,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:50,643 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 15:06:50,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-10-28 15:06:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 15:06:50,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 15:06:50,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:06:50,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 15:06:54,472 WARN L193 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 705 DAG size of output: 696 [2020-10-28 15:08:09,935 WARN L193 SmtUtils]: Spent 1.26 m on a formula simplification. DAG size of input: 5043 DAG size of output: 1309 [2020-10-28 15:08:22,174 WARN L193 SmtUtils]: Spent 12.14 s on a formula simplification. DAG size of input: 688 DAG size of output: 69