/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:59:40,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:59:40,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:59:40,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:59:40,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:59:40,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:59:40,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:59:40,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:59:40,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:59:40,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:59:40,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:59:40,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:59:40,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:59:40,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:59:40,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:59:40,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:59:40,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:59:40,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:59:40,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:59:40,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:59:40,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:59:40,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:59:40,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:59:40,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:59:40,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:59:40,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:59:40,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:59:40,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:59:40,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:59:40,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:59:40,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:59:40,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:59:40,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:59:40,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:59:40,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:59:40,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:59:40,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:59:40,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:59:40,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:59:40,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:59:40,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:59:40,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:59:40,526 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:59:40,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:59:40,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:59:40,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:59:40,532 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:59:40,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:59:40,533 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:59:40,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:59:40,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:59:40,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:59:40,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:59:40,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:59:40,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:59:40,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:59:40,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:59:40,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:59:40,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:59:40,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:59:40,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:59:40,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:59:40,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:59:40,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:59:40,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:59:40,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:59:40,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:59:40,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:59:40,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:59:40,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:59:40,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:59:40,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:59:40,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:59:41,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:59:41,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:59:41,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:59:41,058 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:59:41,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2020-10-28 08:59:41,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41fc53762/a6940e72126f44009a752218e0dbb4ce/FLAGacb7661c4 [2020-10-28 08:59:41,750 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:59:41,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2020-10-28 08:59:41,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41fc53762/a6940e72126f44009a752218e0dbb4ce/FLAGacb7661c4 [2020-10-28 08:59:42,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41fc53762/a6940e72126f44009a752218e0dbb4ce [2020-10-28 08:59:42,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:59:42,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:59:42,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:59:42,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:59:42,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:59:42,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:59:42" (1/1) ... [2020-10-28 08:59:42,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6929c046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42, skipping insertion in model container [2020-10-28 08:59:42,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:59:42" (1/1) ... [2020-10-28 08:59:42,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:59:42,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:59:42,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:59:42,493 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:59:42,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:59:42,554 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:59:42,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42 WrapperNode [2020-10-28 08:59:42,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:59:42,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:59:42,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:59:42,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:59:42,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42" (1/1) ... [2020-10-28 08:59:42,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42" (1/1) ... [2020-10-28 08:59:42,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42" (1/1) ... [2020-10-28 08:59:42,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42" (1/1) ... [2020-10-28 08:59:42,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42" (1/1) ... [2020-10-28 08:59:42,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42" (1/1) ... [2020-10-28 08:59:42,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42" (1/1) ... [2020-10-28 08:59:42,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:59:42,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:59:42,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:59:42,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:59:42,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:59:42,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:59:42,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:59:42,718 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:59:42,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:59:42,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:59:42,719 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:59:42,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:59:42,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:59:42,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:59:42,720 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:59:42,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:59:42,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:59:42,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:59:42,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:59:42,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:59:42,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:59:42,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:59:42,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:59:42,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:59:43,149 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:59:43,150 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 08:59:43,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:59:43 BoogieIcfgContainer [2020-10-28 08:59:43,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:59:43,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:59:43,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:59:43,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:59:43,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:59:42" (1/3) ... [2020-10-28 08:59:43,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c54ab0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:59:43, skipping insertion in model container [2020-10-28 08:59:43,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:42" (2/3) ... [2020-10-28 08:59:43,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c54ab0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:59:43, skipping insertion in model container [2020-10-28 08:59:43,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:59:43" (3/3) ... [2020-10-28 08:59:43,165 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2020-10-28 08:59:43,178 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:59:43,183 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:59:43,200 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:59:43,227 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:59:43,228 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:59:43,228 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:59:43,228 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:59:43,228 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:59:43,229 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:59:43,229 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:59:43,229 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:59:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-28 08:59:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:59:43,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:43,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:43,255 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:43,261 INFO L82 PathProgramCache]: Analyzing trace with hash -18791634, now seen corresponding path program 1 times [2020-10-28 08:59:43,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:43,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093587131] [2020-10-28 08:59:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:43,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:43,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:43,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:43,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:44,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:44,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:59:44,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:44,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-28 08:59:44,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:44,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:44,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:44,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:59:44,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:44,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:59:44,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:44,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:44,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:44,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:44,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:44,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:59:44,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:44,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:44,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:44,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:44,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:44,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:44,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093587131] [2020-10-28 08:59:44,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:59:44,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:59:44,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182855702] [2020-10-28 08:59:44,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:59:44,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:44,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:59:44,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:59:44,363 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-28 08:59:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:44,492 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2020-10-28 08:59:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:59:44,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-28 08:59:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:44,502 INFO L225 Difference]: With dead ends: 58 [2020-10-28 08:59:44,503 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 08:59:44,506 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 08:59:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 08:59:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 08:59:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 08:59:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-28 08:59:44,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2020-10-28 08:59:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:44,549 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-28 08:59:44,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:59:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-28 08:59:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:59:44,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:44,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:44,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:59:44,552 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:44,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1154820394, now seen corresponding path program 1 times [2020-10-28 08:59:44,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:44,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485870549] [2020-10-28 08:59:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:44,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:44,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:44,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:44,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:44,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:59:44,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:44,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-28 08:59:44,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:44,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:44,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:59:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:59:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:59:44,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:59:44,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:44,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:44,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:44,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:44,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:45,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:45,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:45,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:45,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:45,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 08:59:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:45,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485870549] [2020-10-28 08:59:45,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:59:45,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:59:45,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429471072] [2020-10-28 08:59:45,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:59:45,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:45,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:59:45,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:59:45,022 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-10-28 08:59:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:45,207 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2020-10-28 08:59:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:59:45,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 08:59:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:45,209 INFO L225 Difference]: With dead ends: 49 [2020-10-28 08:59:45,209 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 08:59:45,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:59:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 08:59:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 08:59:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 08:59:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-28 08:59:45,219 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-10-28 08:59:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:45,220 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-28 08:59:45,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:59:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-28 08:59:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:59:45,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:45,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:45,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:59:45,222 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:45,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:45,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159768, now seen corresponding path program 1 times [2020-10-28 08:59:45,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:45,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617275109] [2020-10-28 08:59:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:45,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:45,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:45,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:45,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:45,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:48,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:48,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:59:48,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:59:48,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3254 [2020-10-28 08:59:48,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:48,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:59:48,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:59:48,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 08:59:48,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:48,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:48,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:48,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:48,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:48,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:48,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:59:48,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:48,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:48,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:48,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:48,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:48,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 08:59:48,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617275109] [2020-10-28 08:59:48,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:48,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:59:48,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907576490] [2020-10-28 08:59:48,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:59:48,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:59:48,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:59:48,588 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-10-28 08:59:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:48,745 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-28 08:59:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:59:48,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-28 08:59:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:48,747 INFO L225 Difference]: With dead ends: 56 [2020-10-28 08:59:48,747 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 08:59:48,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:59:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 08:59:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 08:59:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:59:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-28 08:59:48,756 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 25 [2020-10-28 08:59:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:48,756 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-28 08:59:48,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:59:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-28 08:59:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:59:48,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:48,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:48,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:59:48,758 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:48,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:48,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2050662806, now seen corresponding path program 2 times [2020-10-28 08:59:48,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:48,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085590452] [2020-10-28 08:59:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:48,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:48,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:48,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:48,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:49,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:53,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:53,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:59:53,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:59:53,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:59:53,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:53,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:53,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:59:53,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:59:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:59:53,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:53,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:53,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:53,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:53,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:53,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:53,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:53,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:53,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:53,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:53,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:53,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:53,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:59:53,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085590452] [2020-10-28 08:59:53,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:53,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:59:53,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235985498] [2020-10-28 08:59:53,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:59:53,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:53,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:59:53,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:59:53,896 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-10-28 08:59:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:54,070 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-28 08:59:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:59:54,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 08:59:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:54,072 INFO L225 Difference]: With dead ends: 63 [2020-10-28 08:59:54,072 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 08:59:54,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:59:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 08:59:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 08:59:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 08:59:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 08:59:54,082 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2020-10-28 08:59:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:54,082 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 08:59:54,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:59:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 08:59:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:59:54,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:54,084 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:54,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:59:54,084 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:54,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:54,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1849014952, now seen corresponding path program 3 times [2020-10-28 08:59:54,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:54,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733420680] [2020-10-28 08:59:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:54,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:54,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:54,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:54,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:55,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:59,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:59,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:59:59,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:59:59,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:59:59,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:59,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:59,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:59:59,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 08:59:59,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 08:59:59,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:59,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:59,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:59,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:59,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:59,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:59,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:59:59,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:59,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:59,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:59,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:59,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:59,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 08:59:59,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733420680] [2020-10-28 08:59:59,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:59,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:59:59,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691807027] [2020-10-28 08:59:59,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:59:59,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:59,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:59:59,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:59:59,246 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2020-10-28 08:59:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:59,499 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-28 08:59:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:59:59,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-28 08:59:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:59,501 INFO L225 Difference]: With dead ends: 70 [2020-10-28 08:59:59,501 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:59:59,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:59:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:59:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:59:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:59:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-28 08:59:59,509 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2020-10-28 08:59:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:59,510 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-28 08:59:59,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:59:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-28 08:59:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 08:59:59,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:59,511 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:59,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:59:59,512 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:59,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1815544746, now seen corresponding path program 4 times [2020-10-28 08:59:59,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:59,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121075651] [2020-10-28 08:59:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:59,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:59,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:59,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:59,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:01,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:04,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:04,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 09:00:04,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:00:04,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:00:04,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:04,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:04,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:00:04,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:04,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:00:04,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:04,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:04,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:04,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:04,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:04,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:00:04,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:04,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:04,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:04,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:04,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:04,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:00:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:00:04,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121075651] [2020-10-28 09:00:04,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:04,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:00:04,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076370602] [2020-10-28 09:00:04,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:00:04,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:00:04,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:00:04,703 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2020-10-28 09:00:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:04,936 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-10-28 09:00:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:00:04,937 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-28 09:00:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:04,939 INFO L225 Difference]: With dead ends: 77 [2020-10-28 09:00:04,939 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 09:00:04,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:00:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 09:00:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-28 09:00:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:00:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-28 09:00:04,953 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-10-28 09:00:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:04,954 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-28 09:00:04,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:00:04,954 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-28 09:00:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:00:04,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:04,956 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:04,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:00:04,956 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:04,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1640122136, now seen corresponding path program 5 times [2020-10-28 09:00:04,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:04,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581242419] [2020-10-28 09:00:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:04,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:05,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:05,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:05,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:08,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:09,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:09,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 09:00:09,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:00:09,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:00:09,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:09,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:09,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:00:09,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:00:09,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:00:09,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:00:10,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:10,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:10,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:10,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:10,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:10,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:10,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:10,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:10,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:10,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:10,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 09:00:10,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581242419] [2020-10-28 09:00:10,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:10,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:00:10,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681167592] [2020-10-28 09:00:10,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:00:10,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:10,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:00:10,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:00:10,311 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 13 states. [2020-10-28 09:00:10,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:10,779 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-10-28 09:00:10,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:00:10,780 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-28 09:00:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:10,781 INFO L225 Difference]: With dead ends: 58 [2020-10-28 09:00:10,781 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 09:00:10,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:00:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 09:00:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-28 09:00:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 09:00:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-28 09:00:10,790 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 41 [2020-10-28 09:00:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:10,791 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-28 09:00:10,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:00:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-28 09:00:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:00:10,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:10,792 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:10,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:00:10,793 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:10,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:10,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1064555330, now seen corresponding path program 1 times [2020-10-28 09:00:10,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:10,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939291995] [2020-10-28 09:00:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:10,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:10,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:10,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:10,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:11,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:11,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:15,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:15,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 09:00:15,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:00:15,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:00:15,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:15,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:15,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:00:15,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:15,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:00:15,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:16,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:16,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:16,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:16,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:16,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:16,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:16,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:16,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:00:16,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 09:00:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:16,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:16,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:16,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:00:16,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:16,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:16,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:16,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:00:16,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:16,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-28 09:00:16,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939291995] [2020-10-28 09:00:16,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:16,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:00:16,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342882356] [2020-10-28 09:00:16,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:00:16,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:16,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:00:16,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:00:16,075 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 9 states. [2020-10-28 09:00:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:16,291 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-10-28 09:00:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:00:16,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-28 09:00:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:16,295 INFO L225 Difference]: With dead ends: 96 [2020-10-28 09:00:16,295 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 09:00:16,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:00:16,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 09:00:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 09:00:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:00:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-28 09:00:16,305 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2020-10-28 09:00:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:16,305 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-28 09:00:16,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:00:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-28 09:00:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:00:16,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:16,306 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:16,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:00:16,307 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash 583078212, now seen corresponding path program 2 times [2020-10-28 09:00:16,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:16,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524275670] [2020-10-28 09:00:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:16,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:16,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:16,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:17,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:18,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:19,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:21,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:21,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:00:21,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:00:21,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:00:21,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:21,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:21,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:00:21,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:00:21,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:00:21,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:21,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:21,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:21,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:21,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:21,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:21,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:21,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:21,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:21,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:21,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:21,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:21,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:21,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:00:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:21,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:21,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:21,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:00:21,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:21,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:21,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:21,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:21,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:21,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:00:21,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:21,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-28 09:00:21,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524275670] [2020-10-28 09:00:21,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:21,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:00:21,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730886717] [2020-10-28 09:00:21,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:00:21,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:21,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:00:21,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:00:21,517 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 10 states. [2020-10-28 09:00:21,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:21,773 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2020-10-28 09:00:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:00:21,774 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-28 09:00:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:21,775 INFO L225 Difference]: With dead ends: 103 [2020-10-28 09:00:21,775 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 09:00:21,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:00:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 09:00:21,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 09:00:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:00:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-28 09:00:21,785 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 53 [2020-10-28 09:00:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:21,785 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-28 09:00:21,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:00:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-28 09:00:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 09:00:21,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:21,786 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:21,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:00:21,787 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:21,787 INFO L82 PathProgramCache]: Analyzing trace with hash -137600638, now seen corresponding path program 3 times [2020-10-28 09:00:21,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:21,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129058641] [2020-10-28 09:00:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:21,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:21,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:21,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:21,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:24,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:24,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:26,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:26,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 09:00:26,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:00:26,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:00:26,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:26,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:00:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:00:26,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:00:26,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:27,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:27,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:27,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:27,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:27,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:27,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:27,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:27,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:27,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:00:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:27,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:27,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:27,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:00:27,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:27,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:27,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:27,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:00:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:27,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-28 09:00:27,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129058641] [2020-10-28 09:00:27,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:27,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:00:27,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917534112] [2020-10-28 09:00:27,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:00:27,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:27,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:00:27,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:00:27,020 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 11 states. [2020-10-28 09:00:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:27,333 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2020-10-28 09:00:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:00:27,334 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 09:00:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:27,335 INFO L225 Difference]: With dead ends: 110 [2020-10-28 09:00:27,335 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 09:00:27,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:00:27,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 09:00:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-28 09:00:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 09:00:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-28 09:00:27,357 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 57 [2020-10-28 09:00:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:27,357 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-28 09:00:27,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:00:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-28 09:00:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:00:27,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:27,361 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:27,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:00:27,361 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash -911976828, now seen corresponding path program 4 times [2020-10-28 09:00:27,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:27,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242608120] [2020-10-28 09:00:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:27,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:27,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:27,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:27,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:28,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:31,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:32,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:32,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:00:32,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:00:32,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:00:32,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:32,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:32,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:00:32,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:00:32,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:00:32,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:32,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:32,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:32,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:32,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:32,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:32,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:32,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:32,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:32,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:32,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:00:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:32,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:32,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:00:32,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:32,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:00:32,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:32,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:32,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:32,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:00:32,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:32,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 09:00:32,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242608120] [2020-10-28 09:00:32,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:32,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:00:32,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563016137] [2020-10-28 09:00:32,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:00:32,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:32,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:00:32,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:00:32,634 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2020-10-28 09:00:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:32,963 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-10-28 09:00:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:00:32,964 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-28 09:00:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:32,965 INFO L225 Difference]: With dead ends: 117 [2020-10-28 09:00:32,965 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 09:00:32,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:00:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 09:00:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-28 09:00:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 09:00:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-28 09:00:32,976 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 61 [2020-10-28 09:00:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:32,977 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-28 09:00:32,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:00:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-28 09:00:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:00:32,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:32,979 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:32,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:00:32,979 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:32,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash -77611070, now seen corresponding path program 5 times [2020-10-28 09:00:32,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:32,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502372601] [2020-10-28 09:00:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:33,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:33,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:33,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:34,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:38,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:38,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:00:38,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:00:38,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:00:38,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:38,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:38,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:00:38,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:38,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:00:38,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:38,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:38,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:38,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:38,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:38,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:38,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:38,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:38,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:38,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:38,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:38,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:38,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:38,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:00:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:38,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:38,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:38,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:00:38,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:38,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:38,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:38,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:00:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:38,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-28 09:00:38,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502372601] [2020-10-28 09:00:38,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:38,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:00:38,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192531217] [2020-10-28 09:00:38,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:00:38,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:38,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:00:38,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:00:38,272 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2020-10-28 09:00:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:38,591 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2020-10-28 09:00:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:00:38,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-28 09:00:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:38,593 INFO L225 Difference]: With dead ends: 124 [2020-10-28 09:00:38,593 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:00:38,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:00:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:00:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-28 09:00:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:00:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-28 09:00:38,615 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 65 [2020-10-28 09:00:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:38,619 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-28 09:00:38,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:00:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-28 09:00:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:00:38,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:38,628 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:38,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:00:38,628 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:38,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1035924540, now seen corresponding path program 6 times [2020-10-28 09:00:38,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:38,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847464837] [2020-10-28 09:00:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:38,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:38,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:38,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:38,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:43,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:43,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:43,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:00:43,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:00:43,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:00:43,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:43,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:43,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:00:43,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:43,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:00:43,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:43,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:43,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:43,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:43,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:43,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:43,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:00:43,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:43,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:43,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:43,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:43,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:43,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:00:43,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:00:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:43,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:43,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:43,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:00:43,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:43,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:43,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:43,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:43,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:43,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:00:43,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:43,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:00:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-10-28 09:00:43,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847464837] [2020-10-28 09:00:43,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:43,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:00:43,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116720963] [2020-10-28 09:00:43,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:00:43,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:43,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:00:43,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:00:43,993 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 14 states. [2020-10-28 09:00:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:44,352 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2020-10-28 09:00:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:00:44,353 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-10-28 09:00:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:44,354 INFO L225 Difference]: With dead ends: 131 [2020-10-28 09:00:44,354 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 09:00:44,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:00:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 09:00:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-28 09:00:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:00:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-28 09:00:44,379 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2020-10-28 09:00:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:44,380 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-28 09:00:44,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:00:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-28 09:00:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:00:44,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:44,381 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:44,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:00:44,381 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:44,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:44,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2086006274, now seen corresponding path program 7 times [2020-10-28 09:00:44,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:44,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041979851] [2020-10-28 09:00:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:44,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:44,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:44,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:44,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:49,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:49,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:00:49,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:49,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:00:49,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:49,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:00:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 09:00:49,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:00:49,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:49,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:49,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:49,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:49,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:49,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:49,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:49,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:49,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:49,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:49,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:49,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:00:49,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:00:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:49,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:49,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:49,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:00:49,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:49,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:49,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:49,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:49,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:49,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:00:49,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:49,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:00:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-28 09:00:49,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041979851] [2020-10-28 09:00:49,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:49,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:00:49,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009423498] [2020-10-28 09:00:49,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:00:49,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:49,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:00:49,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:00:49,832 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 15 states. [2020-10-28 09:00:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:50,284 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2020-10-28 09:00:50,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:00:50,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-28 09:00:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:50,286 INFO L225 Difference]: With dead ends: 138 [2020-10-28 09:00:50,286 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:00:50,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:00:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:00:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-28 09:00:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:00:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-28 09:00:50,300 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 73 [2020-10-28 09:00:50,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:50,301 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-28 09:00:50,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:00:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-28 09:00:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:00:50,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:50,307 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:50,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:00:50,307 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:50,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:50,308 INFO L82 PathProgramCache]: Analyzing trace with hash 315568388, now seen corresponding path program 8 times [2020-10-28 09:00:50,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:50,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085911176] [2020-10-28 09:00:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:50,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:50,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:50,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:55,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:55,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:00:55,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:00:55,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:00:55,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:55,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:00:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:00:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:00:55,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:55,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:55,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:55,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:55,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:55,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:55,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:55,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:55,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:55,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:55,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:55,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:55,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:55,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:00:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:55,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:55,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:55,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:00:55,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:55,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:55,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:55,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:55,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:55,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:00:55,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:55,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-28 09:00:55,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085911176] [2020-10-28 09:00:55,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:55,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:00:55,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852725598] [2020-10-28 09:00:55,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:00:55,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:55,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:00:55,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:00:55,665 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 16 states. [2020-10-28 09:00:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:56,019 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2020-10-28 09:00:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:00:56,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-28 09:00:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:56,021 INFO L225 Difference]: With dead ends: 145 [2020-10-28 09:00:56,021 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 09:00:56,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:00:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 09:00:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-28 09:00:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:00:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-28 09:00:56,035 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 77 [2020-10-28 09:00:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:56,035 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-28 09:00:56,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:00:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-28 09:00:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 09:00:56,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:56,039 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:56,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:00:56,039 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:56,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1680413630, now seen corresponding path program 9 times [2020-10-28 09:00:56,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:56,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228265464] [2020-10-28 09:00:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:56,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:56,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:56,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:56,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:01,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:01,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:01:01,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:01:01,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:01:01,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:01,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:01:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 09:01:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:01:01,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:01,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:01,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:01,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:01,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:01,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:01,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:01,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:01,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:01,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:01,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:01,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:01,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:01:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:01,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:01,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:01,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:01:01,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:01,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:01,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:01,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:01,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:01,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:01:01,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:01,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-28 09:01:01,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228265464] [2020-10-28 09:01:01,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:01,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:01:01,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307853370] [2020-10-28 09:01:01,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:01:01,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:01,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:01:01,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:01:01,470 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2020-10-28 09:01:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:01,900 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2020-10-28 09:01:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:01:01,901 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-28 09:01:01,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:01,902 INFO L225 Difference]: With dead ends: 152 [2020-10-28 09:01:01,902 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:01:01,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:01:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:01:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-28 09:01:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:01:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-28 09:01:01,910 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 81 [2020-10-28 09:01:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:01,911 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-28 09:01:01,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:01:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-28 09:01:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:01:01,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:01,912 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:01,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:01:01,912 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:01,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1568225724, now seen corresponding path program 10 times [2020-10-28 09:01:01,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:01,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979527532] [2020-10-28 09:01:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:01,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:02,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:02,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:02,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:06,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:06,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 09:01:06,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:01:06,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:01:06,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:06,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:06,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:01:06,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:06,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:01:06,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:07,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:07,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:07,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:07,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:07,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:07,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:07,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:07,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:07,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:07,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:01:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:07,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:07,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:07,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:01:07,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:07,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:07,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:07,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:07,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:07,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:01:07,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:07,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-10-28 09:01:07,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979527532] [2020-10-28 09:01:07,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:07,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:01:07,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956598155] [2020-10-28 09:01:07,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:01:07,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:01:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:01:07,347 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 18 states. [2020-10-28 09:01:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:07,754 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-10-28 09:01:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:01:07,754 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-28 09:01:07,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:07,756 INFO L225 Difference]: With dead ends: 159 [2020-10-28 09:01:07,756 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 09:01:07,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:01:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 09:01:07,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-28 09:01:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 09:01:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-28 09:01:07,764 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 85 [2020-10-28 09:01:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:07,764 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-28 09:01:07,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:01:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-28 09:01:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:01:07,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:07,766 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:07,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:01:07,766 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:07,767 INFO L82 PathProgramCache]: Analyzing trace with hash -368395646, now seen corresponding path program 11 times [2020-10-28 09:01:07,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:07,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608191182] [2020-10-28 09:01:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:07,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:07,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:08,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:12,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:12,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:01:12,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:01:12,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:01:12,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:12,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:12,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:01:12,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:12,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:01:12,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:13,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:13,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:13,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:13,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:13,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:13,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:13,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:13,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:13,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:13,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 09:01:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:13,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:13,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:13,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:01:13,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:13,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:13,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:13,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:13,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:13,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:01:13,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:13,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 2 proven. 120 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2020-10-28 09:01:13,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608191182] [2020-10-28 09:01:13,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:13,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:01:13,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477445113] [2020-10-28 09:01:13,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:01:13,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:13,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:01:13,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:01:13,256 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 19 states. [2020-10-28 09:01:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:13,685 INFO L93 Difference]: Finished difference Result 166 states and 177 transitions. [2020-10-28 09:01:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:01:13,686 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-10-28 09:01:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:13,688 INFO L225 Difference]: With dead ends: 166 [2020-10-28 09:01:13,688 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 09:01:13,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:01:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 09:01:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-28 09:01:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:01:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-28 09:01:13,698 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2020-10-28 09:01:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:13,698 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-28 09:01:13,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:01:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-28 09:01:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 09:01:13,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:13,700 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:13,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:01:13,700 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:13,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1180710012, now seen corresponding path program 12 times [2020-10-28 09:01:13,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:13,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628276965] [2020-10-28 09:01:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:13,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:13,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:13,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:14,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:18,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:18,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 09:01:18,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:01:18,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:01:18,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:18,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:18,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:01:18,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:01:18,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:01:18,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:19,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:19,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:19,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:19,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:19,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:19,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:19,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:19,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:19,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:19,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:19,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:19,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:19,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-28 09:01:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:19,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:19,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:19,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:01:19,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:19,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:19,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:19,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:19,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:19,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:01:19,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:19,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 2 proven. 136 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2020-10-28 09:01:19,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628276965] [2020-10-28 09:01:19,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:19,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:01:19,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439919191] [2020-10-28 09:01:19,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:01:19,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:19,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:01:19,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:01:19,267 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 20 states. [2020-10-28 09:01:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:19,655 INFO L93 Difference]: Finished difference Result 173 states and 184 transitions. [2020-10-28 09:01:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:01:19,656 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-28 09:01:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:19,657 INFO L225 Difference]: With dead ends: 173 [2020-10-28 09:01:19,657 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 09:01:19,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:01:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 09:01:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-28 09:01:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 09:01:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-10-28 09:01:19,668 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 93 [2020-10-28 09:01:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:19,668 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-10-28 09:01:19,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:01:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-10-28 09:01:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:01:19,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:19,669 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:19,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:01:19,670 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:19,670 INFO L82 PathProgramCache]: Analyzing trace with hash -434546494, now seen corresponding path program 13 times [2020-10-28 09:01:19,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:19,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003664] [2020-10-28 09:01:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:19,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:19,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:19,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:20,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:24,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:24,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 09:01:24,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:01:24,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:01:24,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:24,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:24,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:01:24,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:24,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:01:24,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:25,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:25,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:25,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:25,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:25,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:25,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:25,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:25,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:25,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:25,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 09:01:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:25,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:25,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:25,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:01:25,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:25,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:01:25,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:25,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:01:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:25,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2020-10-28 09:01:25,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003664] [2020-10-28 09:01:25,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:25,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:01:25,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816612865] [2020-10-28 09:01:25,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:01:25,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:25,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:01:25,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:01:25,295 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 21 states. [2020-10-28 09:01:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:25,846 INFO L93 Difference]: Finished difference Result 180 states and 191 transitions. [2020-10-28 09:01:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:01:25,847 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-10-28 09:01:25,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:25,848 INFO L225 Difference]: With dead ends: 180 [2020-10-28 09:01:25,849 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 09:01:25,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:01:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 09:01:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-28 09:01:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 09:01:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-28 09:01:25,858 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 97 [2020-10-28 09:01:25,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:25,859 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-28 09:01:25,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:01:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-28 09:01:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 09:01:25,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:25,860 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:25,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:01:25,860 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2125315900, now seen corresponding path program 14 times [2020-10-28 09:01:25,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:25,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856485878] [2020-10-28 09:01:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:25,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:25,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:26,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:26,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:30,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:30,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 09:01:30,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:01:30,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 09:01:30,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:30,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:01:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 09:01:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:01:30,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:31,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:31,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:31,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:31,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:31,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:31,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:31,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:31,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:31,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:31,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:31,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:31,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:31,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 09:01:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:31,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:31,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:31,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:01:31,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:31,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:01:31,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:31,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:31,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:31,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:01:31,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:31,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 2 proven. 171 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2020-10-28 09:01:31,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856485878] [2020-10-28 09:01:31,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:31,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:01:31,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003650581] [2020-10-28 09:01:31,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:01:31,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:31,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:01:31,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:01:31,548 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 22 states. [2020-10-28 09:01:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:32,135 INFO L93 Difference]: Finished difference Result 187 states and 198 transitions. [2020-10-28 09:01:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:01:32,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-10-28 09:01:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:32,138 INFO L225 Difference]: With dead ends: 187 [2020-10-28 09:01:32,138 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 09:01:32,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:01:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 09:01:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-28 09:01:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 09:01:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-10-28 09:01:32,148 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 101 [2020-10-28 09:01:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:32,148 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-10-28 09:01:32,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:01:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-10-28 09:01:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 09:01:32,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:32,150 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:32,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:01:32,150 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2116732674, now seen corresponding path program 15 times [2020-10-28 09:01:32,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:32,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142056989] [2020-10-28 09:01:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:32,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:32,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:32,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:32,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:37,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:37,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 09:01:37,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:01:37,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:01:37,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:37,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:37,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:01:37,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 09:01:37,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:01:37,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:37,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:37,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:37,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:37,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:37,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:37,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:37,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:37,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:37,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:37,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:37,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:37,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:37,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-28 09:01:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:37,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:37,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:37,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:01:37,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:37,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:37,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:37,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:37,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:37,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:01:37,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:37,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 2 proven. 190 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2020-10-28 09:01:37,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142056989] [2020-10-28 09:01:37,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:37,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:01:37,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522687164] [2020-10-28 09:01:37,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:01:37,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:37,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:01:37,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:01:37,888 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 23 states. [2020-10-28 09:01:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:38,503 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2020-10-28 09:01:38,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:01:38,507 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2020-10-28 09:01:38,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:38,508 INFO L225 Difference]: With dead ends: 194 [2020-10-28 09:01:38,508 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 09:01:38,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:01:38,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 09:01:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-28 09:01:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 09:01:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-28 09:01:38,518 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 105 [2020-10-28 09:01:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:38,518 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-28 09:01:38,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:01:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-28 09:01:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:01:38,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:38,520 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:38,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:01:38,520 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2083117564, now seen corresponding path program 16 times [2020-10-28 09:01:38,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:38,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425607672] [2020-10-28 09:01:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:38,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:38,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:38,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:39,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:43,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:43,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 09:01:43,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:01:43,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:01:43,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:43,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:43,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:01:43,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 09:01:43,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:01:43,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:44,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:44,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:44,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:44,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:44,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:44,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:44,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:44,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:44,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:44,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 09:01:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:44,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:44,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:44,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:01:44,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:44,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:44,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:44,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:44,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:44,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:01:44,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:44,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 844 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-10-28 09:01:44,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425607672] [2020-10-28 09:01:44,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:44,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:01:44,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297826191] [2020-10-28 09:01:44,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:01:44,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:44,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:01:44,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:01:44,308 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 24 states. [2020-10-28 09:01:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:44,841 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2020-10-28 09:01:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:01:44,842 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 109 [2020-10-28 09:01:44,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:44,843 INFO L225 Difference]: With dead ends: 201 [2020-10-28 09:01:44,843 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:01:44,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:01:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:01:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-28 09:01:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 09:01:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-10-28 09:01:44,852 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2020-10-28 09:01:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:44,852 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-10-28 09:01:44,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:01:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-10-28 09:01:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 09:01:44,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:44,854 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:44,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:01:44,854 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:44,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1889073854, now seen corresponding path program 17 times [2020-10-28 09:01:44,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:44,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135262257] [2020-10-28 09:01:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:44,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:44,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:45,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:49,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:49,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 09:01:49,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:01:49,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:49,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:49,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:01:49,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:01:49,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:01:49,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:50,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:50,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:50,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:50,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:50,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:50,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:50,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:50,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:50,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:50,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:50,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-28 09:01:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:50,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:50,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:50,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:01:50,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:50,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:50,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:50,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:50,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:50,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:01:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:50,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 2 proven. 231 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2020-10-28 09:01:50,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135262257] [2020-10-28 09:01:50,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:50,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:01:50,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734498633] [2020-10-28 09:01:50,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:01:50,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:50,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:01:50,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:01:50,681 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 25 states. [2020-10-28 09:01:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:51,332 INFO L93 Difference]: Finished difference Result 208 states and 219 transitions. [2020-10-28 09:01:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:01:51,333 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2020-10-28 09:01:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:51,335 INFO L225 Difference]: With dead ends: 208 [2020-10-28 09:01:51,335 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 09:01:51,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:01:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 09:01:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-28 09:01:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 09:01:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-28 09:01:51,356 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 113 [2020-10-28 09:01:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:51,356 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-28 09:01:51,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:01:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-28 09:01:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 09:01:51,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:51,357 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:51,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:01:51,358 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:51,358 INFO L82 PathProgramCache]: Analyzing trace with hash 744717124, now seen corresponding path program 18 times [2020-10-28 09:01:51,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:51,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541716513] [2020-10-28 09:01:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:51,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:51,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:51,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:56,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:56,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 09:01:56,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:56,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:01:56,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:56,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:56,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:01:56,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:56,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:01:56,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:57,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:57,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:57,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:57,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:57,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:57,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:57,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:57,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:57,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:57,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:57,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:57,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:57,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 09:01:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:57,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:57,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:57,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:01:57,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:57,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:57,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:57,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:57,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:57,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:01:57,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:57,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2020-10-28 09:01:57,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541716513] [2020-10-28 09:01:57,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:57,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:01:57,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240362081] [2020-10-28 09:01:57,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:01:57,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:57,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:01:57,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:01:57,228 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 26 states. [2020-10-28 09:01:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:57,896 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2020-10-28 09:01:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:01:57,897 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 117 [2020-10-28 09:01:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:57,899 INFO L225 Difference]: With dead ends: 215 [2020-10-28 09:01:57,899 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 09:01:57,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:01:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 09:01:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-28 09:01:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 09:01:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2020-10-28 09:01:57,909 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 117 [2020-10-28 09:01:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:57,909 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2020-10-28 09:01:57,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:01:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2020-10-28 09:01:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 09:01:57,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:57,910 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:57,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:01:57,911 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:57,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:57,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1710625666, now seen corresponding path program 19 times [2020-10-28 09:01:57,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:57,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668209689] [2020-10-28 09:01:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:57,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:58,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:58,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:02,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:02,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 09:02:02,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:02,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:02:02,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:02,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:02,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:02:02,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:02,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:02:02,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:03,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:03,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:03,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:03,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:03,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:03,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:03,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:03,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:03,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:03,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:03,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:03,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:03,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-28 09:02:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:03,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:03,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:03,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:02:03,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:03,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:03,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:03,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:03,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:03,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:02:03,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:03,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 2 proven. 276 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2020-10-28 09:02:03,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668209689] [2020-10-28 09:02:03,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:03,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:02:03,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860878631] [2020-10-28 09:02:03,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:02:03,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:03,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:02:03,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:02:03,882 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 27 states. [2020-10-28 09:02:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:04,574 INFO L93 Difference]: Finished difference Result 222 states and 233 transitions. [2020-10-28 09:02:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:02:04,574 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-10-28 09:02:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:04,576 INFO L225 Difference]: With dead ends: 222 [2020-10-28 09:02:04,576 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 09:02:04,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:02:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 09:02:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-28 09:02:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 09:02:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-10-28 09:02:04,585 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 121 [2020-10-28 09:02:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:04,585 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-10-28 09:02:04,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:02:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-10-28 09:02:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 09:02:04,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:04,587 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:04,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:02:04,587 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:04,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:04,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1194475652, now seen corresponding path program 20 times [2020-10-28 09:02:04,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:04,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837900973] [2020-10-28 09:02:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:04,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:04,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:04,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:09,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:09,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 09:02:09,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:09,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:02:09,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:09,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:02:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 09:02:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:02:09,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:10,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:10,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:10,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:10,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:10,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:10,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:10,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:10,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:10,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:10,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:10,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:10,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-28 09:02:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:10,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:10,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:10,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:02:10,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:10,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:10,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:10,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:10,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:10,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:02:10,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:10,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 2 proven. 300 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2020-10-28 09:02:10,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837900973] [2020-10-28 09:02:10,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:10,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:02:10,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877767443] [2020-10-28 09:02:10,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:02:10,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:10,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:02:10,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:02:10,632 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2020-10-28 09:02:11,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:11,365 INFO L93 Difference]: Finished difference Result 229 states and 240 transitions. [2020-10-28 09:02:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:02:11,366 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 125 [2020-10-28 09:02:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:11,368 INFO L225 Difference]: With dead ends: 229 [2020-10-28 09:02:11,368 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 09:02:11,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:02:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 09:02:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-28 09:02:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 09:02:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-10-28 09:02:11,378 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 125 [2020-10-28 09:02:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:11,378 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-10-28 09:02:11,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:02:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-10-28 09:02:11,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 09:02:11,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:11,379 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:11,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:02:11,379 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:11,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1023406530, now seen corresponding path program 21 times [2020-10-28 09:02:11,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:11,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574273591] [2020-10-28 09:02:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:11,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:11,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:11,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:16,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:16,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-28 09:02:16,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:16,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:02:16,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:16,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:16,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:02:16,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 09:02:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:02:16,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:17,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:17,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:17,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:17,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:17,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:17,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:02:17,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:17,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:17,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:17,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:17,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:17,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:17,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-28 09:02:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:17,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:17,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:17,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:02:17,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:17,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:17,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:17,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:17,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:17,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:02:17,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:17,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 2 proven. 325 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2020-10-28 09:02:17,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574273591] [2020-10-28 09:02:17,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:17,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:02:17,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525880386] [2020-10-28 09:02:17,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:02:17,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:02:17,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:02:17,444 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 29 states. [2020-10-28 09:02:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:18,183 INFO L93 Difference]: Finished difference Result 236 states and 247 transitions. [2020-10-28 09:02:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:02:18,184 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-10-28 09:02:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:18,185 INFO L225 Difference]: With dead ends: 236 [2020-10-28 09:02:18,185 INFO L226 Difference]: Without dead ends: 136 [2020-10-28 09:02:18,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:02:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-28 09:02:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-28 09:02:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 09:02:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-10-28 09:02:18,194 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 129 [2020-10-28 09:02:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:18,194 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-10-28 09:02:18,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:02:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-10-28 09:02:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 09:02:18,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:18,195 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:18,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:02:18,196 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:18,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2122680892, now seen corresponding path program 22 times [2020-10-28 09:02:18,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:18,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775342875] [2020-10-28 09:02:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:18,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:18,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:18,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:23,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:23,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 09:02:23,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:23,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:02:23,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:23,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:23,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:02:23,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:23,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:02:23,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:24,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:24,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:24,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:24,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:24,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:24,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:24,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:24,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:24,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:24,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:24,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:24,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:24,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-28 09:02:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:24,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:24,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:24,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:02:24,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:24,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:24,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:24,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:24,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:24,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:02:24,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:24,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 2 proven. 351 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2020-10-28 09:02:24,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775342875] [2020-10-28 09:02:24,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:24,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:02:24,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680377646] [2020-10-28 09:02:24,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:02:24,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:24,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:02:24,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:02:24,342 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 30 states. [2020-10-28 09:02:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:24,988 INFO L93 Difference]: Finished difference Result 243 states and 254 transitions. [2020-10-28 09:02:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:02:24,989 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 133 [2020-10-28 09:02:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:24,991 INFO L225 Difference]: With dead ends: 243 [2020-10-28 09:02:24,991 INFO L226 Difference]: Without dead ends: 140 [2020-10-28 09:02:24,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:02:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-28 09:02:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-10-28 09:02:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 09:02:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2020-10-28 09:02:25,006 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 133 [2020-10-28 09:02:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:25,007 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2020-10-28 09:02:25,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:02:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2020-10-28 09:02:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 09:02:25,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:25,008 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:25,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:02:25,008 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:25,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1095983102, now seen corresponding path program 23 times [2020-10-28 09:02:25,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:25,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154535507] [2020-10-28 09:02:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:25,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:25,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:25,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:30,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:30,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 09:02:30,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:30,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 09:02:30,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:30,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:30,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:02:30,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 09:02:30,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:02:30,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:31,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:31,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:31,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:31,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:31,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:31,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:31,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:31,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:31,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:31,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:31,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:31,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:31,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-28 09:02:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:31,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:31,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:31,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:02:31,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:31,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:02:31,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:31,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:31,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:31,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:02:31,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:31,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 2 proven. 378 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2020-10-28 09:02:31,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154535507] [2020-10-28 09:02:31,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:31,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:02:31,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169873999] [2020-10-28 09:02:31,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:02:31,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:02:31,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:02:31,233 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 31 states. [2020-10-28 09:02:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:31,842 INFO L93 Difference]: Finished difference Result 250 states and 261 transitions. [2020-10-28 09:02:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:02:31,843 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 137 [2020-10-28 09:02:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:31,844 INFO L225 Difference]: With dead ends: 250 [2020-10-28 09:02:31,845 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 09:02:31,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:02:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 09:02:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-28 09:02:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 09:02:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2020-10-28 09:02:31,854 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 137 [2020-10-28 09:02:31,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:31,855 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2020-10-28 09:02:31,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:02:31,855 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2020-10-28 09:02:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-28 09:02:31,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:31,856 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:31,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:02:31,856 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash -378266876, now seen corresponding path program 24 times [2020-10-28 09:02:31,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:31,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086792112] [2020-10-28 09:02:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:31,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:32,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:32,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:36,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 09:02:36,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:36,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 09:02:36,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:36,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:36,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:02:36,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:36,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:02:36,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:38,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:38,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:38,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:38,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:38,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:38,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:38,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:38,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:38,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:38,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:38,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:38,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-28 09:02:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:38,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:38,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:02:38,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:38,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:02:38,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:38,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:02:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:38,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1628 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 1220 trivial. 0 not checked. [2020-10-28 09:02:38,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086792112] [2020-10-28 09:02:38,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:38,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:02:38,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516677186] [2020-10-28 09:02:38,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:02:38,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:38,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:02:38,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:02:38,224 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 32 states. [2020-10-28 09:02:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:38,965 INFO L93 Difference]: Finished difference Result 257 states and 268 transitions. [2020-10-28 09:02:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:02:38,967 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 141 [2020-10-28 09:02:38,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:38,968 INFO L225 Difference]: With dead ends: 257 [2020-10-28 09:02:38,968 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 09:02:38,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:02:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 09:02:38,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-28 09:02:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-28 09:02:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2020-10-28 09:02:38,978 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 141 [2020-10-28 09:02:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:38,979 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2020-10-28 09:02:38,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:02:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2020-10-28 09:02:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 09:02:38,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:38,980 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:38,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:02:38,980 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2078007742, now seen corresponding path program 25 times [2020-10-28 09:02:38,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:38,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125377803] [2020-10-28 09:02:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:39,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:39,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:39,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:44,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:44,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 09:02:44,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:44,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 09:02:44,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:44,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:44,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:02:44,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:44,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:02:44,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:45,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:45,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:45,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:45,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:45,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:45,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:45,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:45,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:45,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:45,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:45,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:45,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:45,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-28 09:02:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:45,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:45,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:45,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:02:45,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:45,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:45,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:45,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:02:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:45,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 2 proven. 435 refuted. 0 times theorem prover too weak. 1307 trivial. 0 not checked. [2020-10-28 09:02:45,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125377803] [2020-10-28 09:02:45,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:45,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:02:45,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036774133] [2020-10-28 09:02:45,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:02:45,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:45,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:02:45,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:02:45,413 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 33 states. [2020-10-28 09:02:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:46,240 INFO L93 Difference]: Finished difference Result 264 states and 275 transitions. [2020-10-28 09:02:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:02:46,241 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 145 [2020-10-28 09:02:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:46,242 INFO L225 Difference]: With dead ends: 264 [2020-10-28 09:02:46,242 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 09:02:46,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:02:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 09:02:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-28 09:02:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 09:02:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-10-28 09:02:46,251 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 145 [2020-10-28 09:02:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:46,252 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-10-28 09:02:46,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:02:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-10-28 09:02:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 09:02:46,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:46,253 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:46,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:02:46,254 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:46,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:46,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1851207748, now seen corresponding path program 26 times [2020-10-28 09:02:46,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:46,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010146115] [2020-10-28 09:02:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:46,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:51,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 09:02:51,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:51,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:02:51,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:51,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:51,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:02:51,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:51,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:02:51,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:52,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:52,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:52,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:52,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:52,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:52,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:52,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:52,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:52,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:52,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-28 09:02:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:52,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:52,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:02:52,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:52,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:52,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:52,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:52,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:52,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:02:52,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:52,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 2 proven. 465 refuted. 0 times theorem prover too weak. 1397 trivial. 0 not checked. [2020-10-28 09:02:52,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010146115] [2020-10-28 09:02:52,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:52,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:02:52,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106514361] [2020-10-28 09:02:52,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:02:52,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:52,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:02:52,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:02:52,773 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 34 states. [2020-10-28 09:02:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:53,653 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2020-10-28 09:02:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:02:53,654 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2020-10-28 09:02:53,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:53,656 INFO L225 Difference]: With dead ends: 271 [2020-10-28 09:02:53,656 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 09:02:53,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:02:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 09:02:53,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-28 09:02:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 09:02:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2020-10-28 09:02:53,670 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 149 [2020-10-28 09:02:53,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:53,671 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2020-10-28 09:02:53,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:02:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2020-10-28 09:02:53,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 09:02:53,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:53,672 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:53,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:02:53,672 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:53,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1785828222, now seen corresponding path program 27 times [2020-10-28 09:02:53,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:53,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900311456] [2020-10-28 09:02:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:53,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:53,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:54,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:58,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:58,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-28 09:02:58,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:58,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 09:02:58,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:58,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:58,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:02:58,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 09:02:58,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:02:58,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:00,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:00,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:00,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:00,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:00,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:00,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:00,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:00,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:00,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:00,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:00,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:00,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:00,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 09:03:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:00,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:00,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:00,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:03:00,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:00,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:03:00,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:00,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:03:00,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:00,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 2 proven. 496 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2020-10-28 09:03:00,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900311456] [2020-10-28 09:03:00,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:00,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:03:00,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131495804] [2020-10-28 09:03:00,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:03:00,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:03:00,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:03:00,320 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 35 states. [2020-10-28 09:03:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:00,997 INFO L93 Difference]: Finished difference Result 278 states and 289 transitions. [2020-10-28 09:03:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:03:00,998 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 153 [2020-10-28 09:03:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:01,000 INFO L225 Difference]: With dead ends: 278 [2020-10-28 09:03:01,000 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 09:03:01,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:03:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 09:03:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-28 09:03:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-28 09:03:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2020-10-28 09:03:01,011 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 153 [2020-10-28 09:03:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:01,011 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2020-10-28 09:03:01,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:03:01,011 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2020-10-28 09:03:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-28 09:03:01,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:01,012 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:01,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:03:01,013 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1616622980, now seen corresponding path program 28 times [2020-10-28 09:03:01,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:01,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055269843] [2020-10-28 09:03:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:01,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:01,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:01,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:06,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:06,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 09:03:06,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:06,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:03:06,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:06,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:06,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:03:06,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:06,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:03:06,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:07,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:07,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:07,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:07,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:07,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:07,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:07,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:07,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:07,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:07,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:07,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:07,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-28 09:03:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:07,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:07,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:07,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:03:07,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:07,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:03:07,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:07,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:03:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:07,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 2 proven. 528 refuted. 0 times theorem prover too weak. 1586 trivial. 0 not checked. [2020-10-28 09:03:07,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055269843] [2020-10-28 09:03:07,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:07,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:03:07,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423471756] [2020-10-28 09:03:07,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:03:07,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:07,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:03:07,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:03:07,708 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 36 states. [2020-10-28 09:03:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:08,627 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2020-10-28 09:03:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:03:08,628 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 157 [2020-10-28 09:03:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:08,630 INFO L225 Difference]: With dead ends: 285 [2020-10-28 09:03:08,630 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 09:03:08,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:03:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 09:03:08,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-10-28 09:03:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 09:03:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2020-10-28 09:03:08,642 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 157 [2020-10-28 09:03:08,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:08,642 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2020-10-28 09:03:08,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:03:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2020-10-28 09:03:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 09:03:08,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:08,644 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:08,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:03:08,644 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:08,644 INFO L82 PathProgramCache]: Analyzing trace with hash -367818046, now seen corresponding path program 29 times [2020-10-28 09:03:08,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:08,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226266842] [2020-10-28 09:03:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:08,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:09,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:13,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-28 09:03:13,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:13,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:03:13,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:13,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:03:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 09:03:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:03:13,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:15,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:15,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:15,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:15,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:15,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:15,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:15,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:15,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:15,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:15,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-28 09:03:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:15,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:15,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:15,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:03:15,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:15,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:03:15,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:15,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:15,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:15,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:03:15,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:15,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2248 backedges. 2 proven. 561 refuted. 0 times theorem prover too weak. 1685 trivial. 0 not checked. [2020-10-28 09:03:15,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226266842] [2020-10-28 09:03:15,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:15,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:03:15,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419812382] [2020-10-28 09:03:15,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:03:15,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:03:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:03:15,416 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 37 states. [2020-10-28 09:03:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:16,340 INFO L93 Difference]: Finished difference Result 292 states and 303 transitions. [2020-10-28 09:03:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:03:16,341 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2020-10-28 09:03:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:16,342 INFO L225 Difference]: With dead ends: 292 [2020-10-28 09:03:16,343 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 09:03:16,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:03:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 09:03:16,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-28 09:03:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 09:03:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2020-10-28 09:03:16,353 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 161 [2020-10-28 09:03:16,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:16,353 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2020-10-28 09:03:16,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:03:16,353 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2020-10-28 09:03:16,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 09:03:16,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:16,355 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:16,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:03:16,355 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:16,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:16,356 INFO L82 PathProgramCache]: Analyzing trace with hash -256267580, now seen corresponding path program 30 times [2020-10-28 09:03:16,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:16,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074966326] [2020-10-28 09:03:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:16,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:16,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:16,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:21,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:21,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-28 09:03:21,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:21,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:03:21,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:21,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:21,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:03:21,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:21,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:03:21,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:23,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:23,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:23,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:23,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:23,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:23,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:23,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:23,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:23,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:23,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:23,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:23,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:23,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-10-28 09:03:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:23,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:23,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:23,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:03:23,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:23,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:03:23,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:23,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:23,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:23,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:03:23,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:23,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 2 proven. 595 refuted. 0 times theorem prover too weak. 1787 trivial. 0 not checked. [2020-10-28 09:03:23,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074966326] [2020-10-28 09:03:23,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:23,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:03:23,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213009132] [2020-10-28 09:03:23,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:03:23,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:23,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:03:23,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:03:23,227 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 38 states. [2020-10-28 09:03:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:23,935 INFO L93 Difference]: Finished difference Result 299 states and 310 transitions. [2020-10-28 09:03:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:03:23,936 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 165 [2020-10-28 09:03:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:23,937 INFO L225 Difference]: With dead ends: 299 [2020-10-28 09:03:23,938 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 09:03:23,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:03:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 09:03:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-28 09:03:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 09:03:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2020-10-28 09:03:23,951 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 165 [2020-10-28 09:03:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:23,951 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2020-10-28 09:03:23,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:03:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2020-10-28 09:03:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 09:03:23,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:23,952 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:23,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:03:23,953 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash -405047038, now seen corresponding path program 31 times [2020-10-28 09:03:23,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:23,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310666108] [2020-10-28 09:03:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:24,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:29,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:29,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-28 09:03:29,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:29,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 09:03:29,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:29,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:03:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 09:03:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:03:29,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:30,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:30,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:30,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:30,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:30,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:03:30,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:30,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:30,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:30,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:30,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:30,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:30,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-28 09:03:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:30,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:30,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:03:30,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:30,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:03:30,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:30,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:30,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:30,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:03:30,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:30,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2524 backedges. 2 proven. 630 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-10-28 09:03:30,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310666108] [2020-10-28 09:03:30,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:30,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:03:30,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700711421] [2020-10-28 09:03:30,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:03:30,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:30,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:03:30,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:03:30,975 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 39 states. [2020-10-28 09:03:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:31,908 INFO L93 Difference]: Finished difference Result 306 states and 317 transitions. [2020-10-28 09:03:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:03:31,909 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 169 [2020-10-28 09:03:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:31,914 INFO L225 Difference]: With dead ends: 306 [2020-10-28 09:03:31,914 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 09:03:31,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:03:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 09:03:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-10-28 09:03:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-28 09:03:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2020-10-28 09:03:31,923 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 169 [2020-10-28 09:03:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:31,924 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2020-10-28 09:03:31,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:03:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2020-10-28 09:03:31,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 09:03:31,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:31,927 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:31,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:03:31,927 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1314320380, now seen corresponding path program 32 times [2020-10-28 09:03:31,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:31,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957079633] [2020-10-28 09:03:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:32,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:32,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:32,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking...