/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_copy1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:51:05,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:51:05,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:51:05,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:51:05,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:51:05,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:51:05,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:51:05,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:51:05,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:51:05,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:51:05,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:51:05,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:51:05,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:51:05,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:51:05,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:51:05,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:51:05,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:51:05,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:51:05,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:51:05,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:51:05,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:51:05,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:51:05,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:51:05,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:51:05,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:51:05,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:51:05,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:51:05,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:51:05,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:51:05,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:51:05,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:51:05,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:51:05,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:51:05,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:51:05,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:51:05,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:51:05,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:51:05,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:51:05,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:51:05,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:51:05,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:51:05,443 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 08:51:05,498 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:51:05,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:51:05,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:51:05,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:51:05,504 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:51:05,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:51:05,504 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:51:05,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:51:05,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:51:05,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:51:05,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:51:05,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:51:05,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:51:05,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:51:05,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:51:05,508 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:51:05,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:51:05,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:51:05,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:51:05,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:51:05,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:51:05,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:51:05,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:51:05,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:51:05,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:51:05,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:51:05,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:51:05,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:51:05,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:51:05,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:51:05,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:51:05,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:51:05,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:51:05,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:51:05,991 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:51:05,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2020-10-28 08:51:06,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f323d41df/7f10eaa7d3514c479a33b1bf618175df/FLAG93a254705 [2020-10-28 08:51:06,797 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:51:06,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2020-10-28 08:51:06,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f323d41df/7f10eaa7d3514c479a33b1bf618175df/FLAG93a254705 [2020-10-28 08:51:07,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f323d41df/7f10eaa7d3514c479a33b1bf618175df [2020-10-28 08:51:07,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:51:07,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:51:07,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:07,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:51:07,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:51:07,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:07" (1/1) ... [2020-10-28 08:51:07,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@689b59bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07, skipping insertion in model container [2020-10-28 08:51:07,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:07" (1/1) ... [2020-10-28 08:51:07,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:51:07,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:51:07,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:07,375 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:51:07,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:07,415 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:51:07,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07 WrapperNode [2020-10-28 08:51:07,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:07,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:51:07,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:51:07,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:51:07,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07" (1/1) ... [2020-10-28 08:51:07,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07" (1/1) ... [2020-10-28 08:51:07,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07" (1/1) ... [2020-10-28 08:51:07,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07" (1/1) ... [2020-10-28 08:51:07,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07" (1/1) ... [2020-10-28 08:51:07,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07" (1/1) ... [2020-10-28 08:51:07,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07" (1/1) ... [2020-10-28 08:51:07,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:51:07,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:51:07,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:51:07,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:51:07,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:51:07,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:51:07,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:51:07,531 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:51:07,532 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:51:07,532 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:51:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:51:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:51:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:51:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:51:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:51:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:51:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:51:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:51:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:51:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:51:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:51:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:51:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:51:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:51:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:51:07,994 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:51:07,995 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 08:51:07,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:07 BoogieIcfgContainer [2020-10-28 08:51:07,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:51:08,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:51:08,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:51:08,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:51:08,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:51:07" (1/3) ... [2020-10-28 08:51:08,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f822f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:08, skipping insertion in model container [2020-10-28 08:51:08,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:07" (2/3) ... [2020-10-28 08:51:08,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f822f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:08, skipping insertion in model container [2020-10-28 08:51:08,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:07" (3/3) ... [2020-10-28 08:51:08,011 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-1.i [2020-10-28 08:51:08,026 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:51:08,032 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:51:08,046 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:51:08,095 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:51:08,096 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:51:08,096 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:51:08,096 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:51:08,096 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:51:08,096 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:51:08,096 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:51:08,097 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:51:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-28 08:51:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 08:51:08,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:08,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:08,135 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-28 08:51:08,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:08,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959642875] [2020-10-28 08:51:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:08,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:08,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 08:51:08,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:08,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-28 08:51:08,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:08,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:08,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:08,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:51:08,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:08,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 08:51:08,768 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-28 08:51:08,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:08,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:08,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:08,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:08,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:51:08,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:08,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:08,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:08,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:08,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:08,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:08,796 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 08:51:08,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959642875] [2020-10-28 08:51:08,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:08,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:51:08,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663946963] [2020-10-28 08:51:08,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:51:08,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:08,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:51:08,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:08,824 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-28 08:51:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:08,923 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-28 08:51:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:51:08,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 08:51:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:08,934 INFO L225 Difference]: With dead ends: 53 [2020-10-28 08:51:08,934 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 08:51:08,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 08:51:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 08:51:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 08:51:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-28 08:51:08,985 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-28 08:51:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:08,986 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-28 08:51:08,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:51:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-28 08:51:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 08:51:08,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:08,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:08,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:51:08,988 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:08,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1754426942, now seen corresponding path program 1 times [2020-10-28 08:51:08,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:08,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964360535] [2020-10-28 08:51:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:09,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:09,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 08:51:09,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:09,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-28 08:51:09,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:09,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 08:51:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:09,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:09,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:09,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:09,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:09,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:09,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:51:09,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:09,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:09,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:09,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:09,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:09,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:09,289 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 08:51:09,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964360535] [2020-10-28 08:51:09,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:09,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:09,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913113187] [2020-10-28 08:51:09,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:09,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:09,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:09,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:09,294 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-28 08:51:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:09,368 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-28 08:51:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:09,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 08:51:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:09,370 INFO L225 Difference]: With dead ends: 39 [2020-10-28 08:51:09,370 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 08:51:09,371 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 08:51:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 08:51:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-28 08:51:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 08:51:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 08:51:09,380 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-28 08:51:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:09,380 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 08:51:09,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 08:51:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:51:09,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:09,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:09,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:51:09,382 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:09,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1373994528, now seen corresponding path program 1 times [2020-10-28 08:51:09,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:09,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847954714] [2020-10-28 08:51:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:10,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:51:10,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:10,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-10-28 08:51:10,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:10,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 08:51:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:10,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:10,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:10,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:10,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:10,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:10,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:10,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:10,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:10,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:10,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:10,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847954714] [2020-10-28 08:51:10,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:10,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:10,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368264912] [2020-10-28 08:51:10,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:10,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:10,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:10,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:10,472 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-10-28 08:51:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:10,568 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-28 08:51:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:10,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 08:51:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:10,570 INFO L225 Difference]: With dead ends: 41 [2020-10-28 08:51:10,570 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 08:51:10,571 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 08:51:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 08:51:10,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-28 08:51:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 08:51:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 08:51:10,579 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-28 08:51:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:10,579 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 08:51:10,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 08:51:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:51:10,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:10,580 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:10,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:51:10,581 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:10,582 INFO L82 PathProgramCache]: Analyzing trace with hash -850664834, now seen corresponding path program 2 times [2020-10-28 08:51:10,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:10,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098095677] [2020-10-28 08:51:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:10,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:11,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:51:11,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:11,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-10-28 08:51:11,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:11,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:11,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:11,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:11,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:11,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:11,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:11,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:11,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:11,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:11,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:11,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:11,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:11,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:11,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098095677] [2020-10-28 08:51:11,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:11,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:11,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363415293] [2020-10-28 08:51:11,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:11,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:11,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:11,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:11,379 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 4 states. [2020-10-28 08:51:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:11,445 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-28 08:51:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:11,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 08:51:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:11,446 INFO L225 Difference]: With dead ends: 48 [2020-10-28 08:51:11,446 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 08:51:11,447 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 08:51:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 08:51:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-28 08:51:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 08:51:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-28 08:51:11,454 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-10-28 08:51:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:11,454 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-28 08:51:11,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-28 08:51:11,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 08:51:11,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:11,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:11,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:51:11,457 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:11,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1873587236, now seen corresponding path program 1 times [2020-10-28 08:51:11,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:11,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019484643] [2020-10-28 08:51:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:12,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:12,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 08:51:12,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:12,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1189 [2020-10-28 08:51:12,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:12,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:51:12,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:12,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:12,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:12,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:12,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:12,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:12,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:12,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:12,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:12,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:12,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:12,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 08:51:12,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019484643] [2020-10-28 08:51:12,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:12,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:12,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346489970] [2020-10-28 08:51:12,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:12,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:12,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:12,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:12,759 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-28 08:51:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:12,850 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-28 08:51:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:12,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 08:51:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:12,852 INFO L225 Difference]: With dead ends: 44 [2020-10-28 08:51:12,852 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 08:51:12,853 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 08:51:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 08:51:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 08:51:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 08:51:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 08:51:12,861 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-28 08:51:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:12,861 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 08:51:12,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 08:51:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:51:12,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:12,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:12,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:51:12,863 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash 77079930, now seen corresponding path program 2 times [2020-10-28 08:51:12,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:12,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654627101] [2020-10-28 08:51:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:12,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:12,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:13,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:14,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:51:14,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:14,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-28 08:51:14,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:14,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:14,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:14,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:14,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:14,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:14,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:14,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:14,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:14,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:14,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:14,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:14,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:14,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:51:14,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654627101] [2020-10-28 08:51:14,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:14,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:14,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476578649] [2020-10-28 08:51:14,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:14,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:14,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:14,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:14,196 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-10-28 08:51:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:14,302 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-10-28 08:51:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:14,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-28 08:51:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:14,305 INFO L225 Difference]: With dead ends: 54 [2020-10-28 08:51:14,305 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 08:51:14,307 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 08:51:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 08:51:14,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 08:51:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 08:51:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-28 08:51:14,318 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2020-10-28 08:51:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:14,319 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-28 08:51:14,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-28 08:51:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 08:51:14,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:14,322 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:14,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:51:14,323 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:14,324 INFO L82 PathProgramCache]: Analyzing trace with hash 699119576, now seen corresponding path program 3 times [2020-10-28 08:51:14,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:14,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820548566] [2020-10-28 08:51:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:14,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:17,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 08:51:17,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:17,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2775 [2020-10-28 08:51:17,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:17,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:17,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:17,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:17,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:17,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:17,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:17,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:17,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:17,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:17,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:17,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:17,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:17,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:17,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:17,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:17,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:17,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820548566] [2020-10-28 08:51:17,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:17,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:17,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208488181] [2020-10-28 08:51:17,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:17,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:17,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:17,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:17,206 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-10-28 08:51:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:17,322 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-28 08:51:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:17,322 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-28 08:51:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:17,324 INFO L225 Difference]: With dead ends: 48 [2020-10-28 08:51:17,324 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 08:51:17,325 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 08:51:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 08:51:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-28 08:51:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:51:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-28 08:51:17,341 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-10-28 08:51:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:17,341 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-28 08:51:17,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-28 08:51:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:51:17,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:17,343 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:17,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:51:17,346 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:17,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:17,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1452836234, now seen corresponding path program 4 times [2020-10-28 08:51:17,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:17,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838241947] [2020-10-28 08:51:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:17,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:20,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:51:20,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:20,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3021 [2020-10-28 08:51:20,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:20,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:51:20,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:20,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:20,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:20,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:20,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:20,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:20,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:20,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:20,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:20,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:20,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:20,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:20,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838241947] [2020-10-28 08:51:20,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:20,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:20,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665886148] [2020-10-28 08:51:20,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:20,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:20,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:20,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:20,469 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2020-10-28 08:51:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:20,549 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-28 08:51:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:20,550 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-28 08:51:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:20,551 INFO L225 Difference]: With dead ends: 50 [2020-10-28 08:51:20,551 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 08:51:20,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 08:51:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-28 08:51:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 08:51:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-28 08:51:20,558 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2020-10-28 08:51:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:20,558 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-28 08:51:20,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-28 08:51:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:51:20,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:20,559 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:20,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:51:20,560 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:20,560 INFO L82 PathProgramCache]: Analyzing trace with hash 691867028, now seen corresponding path program 5 times [2020-10-28 08:51:20,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:20,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086265045] [2020-10-28 08:51:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:20,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:24,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:51:24,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:24,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3964 [2020-10-28 08:51:24,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:24,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:24,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:24,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:24,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:24,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:24,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:24,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:24,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:24,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:24,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:24,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:24,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:24,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:24,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:24,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:24,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:51:24,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086265045] [2020-10-28 08:51:24,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:24,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671200085] [2020-10-28 08:51:24,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:24,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:24,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:24,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:24,603 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2020-10-28 08:51:24,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:24,679 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-28 08:51:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:24,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-28 08:51:24,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:24,681 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:51:24,681 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 08:51:24,682 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 08:51:24,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 08:51:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-28 08:51:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 08:51:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-28 08:51:24,687 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-10-28 08:51:24,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:24,687 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-28 08:51:24,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-28 08:51:24,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:51:24,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:24,689 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:24,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:51:24,689 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:24,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1369120398, now seen corresponding path program 6 times [2020-10-28 08:51:24,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:24,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877747623] [2020-10-28 08:51:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:24,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:29,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:29,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:51:29,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:29,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:51:29,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:29,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:29,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:51:29,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:29,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:51:29,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:29,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:29,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:29,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:29,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:29,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:29,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:29,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:29,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:29,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:29,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:29,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:29,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:51:29,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877747623] [2020-10-28 08:51:29,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:29,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:51:29,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320387517] [2020-10-28 08:51:29,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:51:29,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:29,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:51:29,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:29,811 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 9 states. [2020-10-28 08:51:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:29,920 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-28 08:51:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:51:29,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-28 08:51:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:29,922 INFO L225 Difference]: With dead ends: 54 [2020-10-28 08:51:29,922 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 08:51:29,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 08:51:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 08:51:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 08:51:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-28 08:51:29,929 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-10-28 08:51:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:29,930 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-28 08:51:29,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:51:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-28 08:51:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 08:51:29,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:29,931 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:29,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:51:29,932 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:29,932 INFO L82 PathProgramCache]: Analyzing trace with hash -461593200, now seen corresponding path program 7 times [2020-10-28 08:51:29,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:29,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487508516] [2020-10-28 08:51:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:29,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:29,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:34,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:34,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 08:51:34,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:34,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:51:34,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:34,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:51:34,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:35,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:35,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:35,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:35,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:35,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:35,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:51:35,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487508516] [2020-10-28 08:51:35,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:35,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:35,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225178437] [2020-10-28 08:51:35,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:35,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:35,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:35,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:35,061 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 10 states. [2020-10-28 08:51:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:35,156 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-28 08:51:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:51:35,157 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-28 08:51:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:35,158 INFO L225 Difference]: With dead ends: 56 [2020-10-28 08:51:35,158 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 08:51:35,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 08:51:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-28 08:51:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:51:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-28 08:51:35,164 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 35 [2020-10-28 08:51:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:35,164 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-28 08:51:35,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-28 08:51:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 08:51:35,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:35,165 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:35,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:51:35,166 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:35,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:35,166 INFO L82 PathProgramCache]: Analyzing trace with hash -206317010, now seen corresponding path program 8 times [2020-10-28 08:51:35,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:35,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072490867] [2020-10-28 08:51:35,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:35,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:40,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 08:51:40,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:40,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:51:40,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:40,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:40,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:40,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:40,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:40,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:40,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:40,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:40,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:40,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:40,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:40,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:40,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:40,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:40,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:40,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:51:40,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072490867] [2020-10-28 08:51:40,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:40,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:40,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549048975] [2020-10-28 08:51:40,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:40,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:40,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:40,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:40,257 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 7 states. [2020-10-28 08:51:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:40,329 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-28 08:51:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:40,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-28 08:51:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:40,331 INFO L225 Difference]: With dead ends: 74 [2020-10-28 08:51:40,331 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 08:51:40,331 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 08:51:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 08:51:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-28 08:51:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 08:51:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-28 08:51:40,337 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-10-28 08:51:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:40,337 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-28 08:51:40,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-28 08:51:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:51:40,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:40,338 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:40,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:51:40,339 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:40,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1645793164, now seen corresponding path program 9 times [2020-10-28 08:51:40,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:40,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33950804] [2020-10-28 08:51:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:40,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:45,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:51:45,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:45,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:51:45,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:45,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:45,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:51:45,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:51:45,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:51:45,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:45,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:45,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:45,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:45,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:45,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:45,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:45,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:45,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:45,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:45,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:45,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 08:51:45,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33950804] [2020-10-28 08:51:45,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:45,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:51:45,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169636642] [2020-10-28 08:51:45,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:51:45,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:51:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:51:45,483 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 11 states. [2020-10-28 08:51:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:45,586 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-28 08:51:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:51:45,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-28 08:51:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:45,588 INFO L225 Difference]: With dead ends: 60 [2020-10-28 08:51:45,588 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 08:51:45,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:51:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 08:51:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 08:51:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 08:51:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-28 08:51:45,594 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2020-10-28 08:51:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:45,594 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-28 08:51:45,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:51:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-28 08:51:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:51:45,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:45,595 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:45,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:51:45,596 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:45,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2062382378, now seen corresponding path program 10 times [2020-10-28 08:51:45,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:45,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375534407] [2020-10-28 08:51:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:45,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:50,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:50,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:51:50,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:50,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 08:51:50,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:50,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:51:50,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:50,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:50,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:50,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:50,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:50,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:50,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:50,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:50,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:50,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:50,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:50,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:50,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 08:51:50,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375534407] [2020-10-28 08:51:50,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:50,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:50,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558667478] [2020-10-28 08:51:50,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:50,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:50,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:50,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:50,726 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 8 states. [2020-10-28 08:51:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:50,817 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-10-28 08:51:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:50,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-28 08:51:50,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:50,819 INFO L225 Difference]: With dead ends: 80 [2020-10-28 08:51:50,819 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 08:51:50,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:50,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 08:51:50,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 08:51:50,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:51:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-28 08:51:50,824 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2020-10-28 08:51:50,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:50,825 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-28 08:51:50,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-28 08:51:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:51:50,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:50,826 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:50,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:51:50,826 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:50,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1728279672, now seen corresponding path program 11 times [2020-10-28 08:51:50,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:50,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123701022] [2020-10-28 08:51:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:50,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:50,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:50,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:55,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:55,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:51:55,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:55,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:51:55,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:55,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:55,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:51:55,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:51:55,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:51:55,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:56,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:56,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:56,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:56,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:56,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:56,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:56,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:56,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:56,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:56,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:56,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:56,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:51:56,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123701022] [2020-10-28 08:51:56,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:56,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:51:56,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527054942] [2020-10-28 08:51:56,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:51:56,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:56,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:51:56,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:56,112 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 12 states. [2020-10-28 08:51:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:56,203 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-28 08:51:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:51:56,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-28 08:51:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:56,205 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:51:56,205 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 08:51:56,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 08:51:56,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-28 08:51:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 08:51:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-28 08:51:56,211 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2020-10-28 08:51:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:56,211 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-28 08:51:56,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:51:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-28 08:51:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:51:56,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:56,212 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:56,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:51:56,213 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2016271834, now seen corresponding path program 12 times [2020-10-28 08:51:56,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:56,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235028887] [2020-10-28 08:51:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:56,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:56,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:56,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:01,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:01,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:52:01,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:01,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:52:01,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:01,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:52:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:52:01,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:52:01,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:01,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:01,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:01,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:01,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:01,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:01,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:01,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:01,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:01,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:01,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:01,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:01,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:52:01,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235028887] [2020-10-28 08:52:01,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:01,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:52:01,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696097547] [2020-10-28 08:52:01,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:52:01,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:01,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:52:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:01,408 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 13 states. [2020-10-28 08:52:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:01,554 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-28 08:52:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:52:01,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-28 08:52:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:01,555 INFO L225 Difference]: With dead ends: 66 [2020-10-28 08:52:01,555 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 08:52:01,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 08:52:01,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-28 08:52:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 08:52:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-28 08:52:01,561 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-28 08:52:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:01,562 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-28 08:52:01,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:52:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-28 08:52:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:52:01,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:01,563 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:01,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:52:01,563 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:01,564 INFO L82 PathProgramCache]: Analyzing trace with hash 396134724, now seen corresponding path program 13 times [2020-10-28 08:52:01,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:01,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927569100] [2020-10-28 08:52:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:01,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:01,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:01,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:06,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:06,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:52:06,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:06,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:52:06,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:06,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:52:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:52:06,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:06,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:06,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:06,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:06,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:06,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:06,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:52:06,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:06,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:06,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:06,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:06,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:06,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:52:06,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927569100] [2020-10-28 08:52:06,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:06,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:52:06,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572072085] [2020-10-28 08:52:06,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:52:06,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:06,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:52:06,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:52:06,689 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 9 states. [2020-10-28 08:52:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:06,797 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-28 08:52:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:52:06,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-28 08:52:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:06,801 INFO L225 Difference]: With dead ends: 90 [2020-10-28 08:52:06,801 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 08:52:06,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:52:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 08:52:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-28 08:52:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:52:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-28 08:52:06,811 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-10-28 08:52:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:06,812 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-28 08:52:06,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:52:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-28 08:52:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:52:06,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:06,818 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:06,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:52:06,818 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:06,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1678565666, now seen corresponding path program 14 times [2020-10-28 08:52:06,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:06,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088724953] [2020-10-28 08:52:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:06,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:06,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:07,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:11,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:11,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:52:11,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:11,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 08:52:11,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:11,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:52:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:52:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:52:11,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:11,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:12,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:12,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:12,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:12,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:12,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:12,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:12,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:12,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:12,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:52:12,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088724953] [2020-10-28 08:52:12,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:12,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:52:12,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744260726] [2020-10-28 08:52:12,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:52:12,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:12,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:52:12,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:12,013 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-10-28 08:52:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:12,223 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-28 08:52:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:52:12,224 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-28 08:52:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:12,224 INFO L225 Difference]: With dead ends: 70 [2020-10-28 08:52:12,224 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 08:52:12,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 08:52:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 08:52:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 08:52:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-28 08:52:12,242 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2020-10-28 08:52:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:12,242 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-28 08:52:12,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:52:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-28 08:52:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 08:52:12,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:12,243 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:12,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:52:12,243 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:12,244 INFO L82 PathProgramCache]: Analyzing trace with hash -802981568, now seen corresponding path program 15 times [2020-10-28 08:52:12,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:12,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881420668] [2020-10-28 08:52:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:12,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:12,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:17,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 08:52:17,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:52:17,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:17,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:52:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:52:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:17,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:17,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:17,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:17,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:17,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:17,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:17,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:17,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:17,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:17,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:17,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 08:52:17,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881420668] [2020-10-28 08:52:17,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:17,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:52:17,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893937337] [2020-10-28 08:52:17,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:52:17,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:17,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:52:17,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:17,377 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 10 states. [2020-10-28 08:52:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:17,513 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-10-28 08:52:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:52:17,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-28 08:52:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:17,515 INFO L225 Difference]: With dead ends: 96 [2020-10-28 08:52:17,515 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 08:52:17,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 08:52:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-28 08:52:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 08:52:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-28 08:52:17,534 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 51 [2020-10-28 08:52:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:17,534 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-28 08:52:17,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:52:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-28 08:52:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:52:17,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:17,536 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:17,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:52:17,537 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:17,537 INFO L82 PathProgramCache]: Analyzing trace with hash 986231326, now seen corresponding path program 16 times [2020-10-28 08:52:17,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:17,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620111391] [2020-10-28 08:52:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:17,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:19,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:22,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:22,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 08:52:22,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:22,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:52:22,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:22,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:22,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:52:22,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:52:22,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:52:22,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:22,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:22,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:22,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:22,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:22,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:22,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:52:22,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:22,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:22,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:22,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:22,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:22,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:52:22,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620111391] [2020-10-28 08:52:22,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:22,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:52:22,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133073049] [2020-10-28 08:52:22,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:52:22,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:52:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:52:22,773 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-10-28 08:52:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:22,998 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-28 08:52:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:52:22,999 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-28 08:52:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:23,000 INFO L225 Difference]: With dead ends: 74 [2020-10-28 08:52:23,000 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 08:52:23,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:52:23,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 08:52:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-28 08:52:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 08:52:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-28 08:52:23,015 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2020-10-28 08:52:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:23,015 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-28 08:52:23,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:52:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-28 08:52:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:52:23,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:23,016 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:23,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:52:23,016 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:23,017 INFO L82 PathProgramCache]: Analyzing trace with hash -416351428, now seen corresponding path program 17 times [2020-10-28 08:52:23,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:23,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981823820] [2020-10-28 08:52:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:23,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:25,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:28,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:28,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:52:28,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:28,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:52:28,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:28,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:52:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:52:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:52:28,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:28,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:28,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:28,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:28,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:28,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:28,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:28,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:28,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:28,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:28,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:28,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:28,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:52:28,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981823820] [2020-10-28 08:52:28,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:28,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:52:28,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267667433] [2020-10-28 08:52:28,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:52:28,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:28,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:52:28,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:28,250 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 16 states. [2020-10-28 08:52:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:28,385 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-28 08:52:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:52:28,385 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-28 08:52:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:28,386 INFO L225 Difference]: With dead ends: 76 [2020-10-28 08:52:28,386 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 08:52:28,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 08:52:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-28 08:52:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:52:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-28 08:52:28,395 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2020-10-28 08:52:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:28,397 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-28 08:52:28,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:52:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-28 08:52:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 08:52:28,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:28,397 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:28,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:52:28,398 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash 321352922, now seen corresponding path program 18 times [2020-10-28 08:52:28,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:28,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601061178] [2020-10-28 08:52:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:28,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:28,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:33,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:33,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 08:52:33,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:33,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:52:33,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:33,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:33,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:52:33,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:33,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:52:33,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:33,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:33,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:33,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:33,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:33,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:33,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:33,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:33,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:33,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:33,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:33,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:33,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:52:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 08:52:33,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601061178] [2020-10-28 08:52:33,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:33,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:52:33,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672373231] [2020-10-28 08:52:33,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:52:33,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:33,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:52:33,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:33,534 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 11 states. [2020-10-28 08:52:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:33,612 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-10-28 08:52:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:52:33,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 08:52:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:33,616 INFO L225 Difference]: With dead ends: 106 [2020-10-28 08:52:33,616 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 08:52:33,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 08:52:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-28 08:52:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:52:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-28 08:52:33,623 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-10-28 08:52:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:33,624 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-28 08:52:33,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:52:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-28 08:52:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 08:52:33,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:33,624 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:33,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:52:33,625 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:33,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1789529912, now seen corresponding path program 19 times [2020-10-28 08:52:33,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:33,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273430706] [2020-10-28 08:52:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:33,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:33,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:36,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:38,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:38,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:52:38,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:38,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:52:38,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:38,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:52:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:52:38,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:52:38,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:38,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:38,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:38,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:38,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:38,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:38,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:38,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:38,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:38,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:38,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:38,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:38,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 08:52:38,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273430706] [2020-10-28 08:52:38,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:38,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:52:38,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719891474] [2020-10-28 08:52:38,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:52:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:52:38,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:52:38,876 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-10-28 08:52:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:39,054 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-28 08:52:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:52:39,055 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-28 08:52:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:39,056 INFO L225 Difference]: With dead ends: 80 [2020-10-28 08:52:39,056 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 08:52:39,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:52:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 08:52:39,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-28 08:52:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 08:52:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-28 08:52:39,060 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-28 08:52:39,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:39,061 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-28 08:52:39,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:52:39,061 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-28 08:52:39,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 08:52:39,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:39,062 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:39,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:52:39,062 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:39,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:39,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1540523562, now seen corresponding path program 20 times [2020-10-28 08:52:39,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:39,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087793846] [2020-10-28 08:52:39,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:39,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:39,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:44,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 08:52:44,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:44,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:52:44,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:44,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:44,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:52:44,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:52:44,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:52:44,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:44,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:44,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:44,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:44,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:44,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:44,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:44,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:44,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:44,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:44,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 08:52:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087793846] [2020-10-28 08:52:44,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:44,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:52:44,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127522874] [2020-10-28 08:52:44,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:52:44,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:52:44,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:52:44,330 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 18 states. [2020-10-28 08:52:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:44,530 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-28 08:52:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:52:44,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-28 08:52:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:44,532 INFO L225 Difference]: With dead ends: 82 [2020-10-28 08:52:44,532 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 08:52:44,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:52:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 08:52:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-28 08:52:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 08:52:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-28 08:52:44,538 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-28 08:52:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:44,539 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-28 08:52:44,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:52:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-28 08:52:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:52:44,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:44,539 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:44,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:52:44,541 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:44,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:44,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1971276556, now seen corresponding path program 21 times [2020-10-28 08:52:44,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:44,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952161408] [2020-10-28 08:52:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:44,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:48,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:49,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:52:49,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:49,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:52:49,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:49,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:52:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:52:49,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:49,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:49,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:49,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:49,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:49,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:49,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:49,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:49,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:52:49,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952161408] [2020-10-28 08:52:49,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:49,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:52:49,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967710561] [2020-10-28 08:52:49,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:52:49,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:49,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:52:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:52:49,694 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 12 states. [2020-10-28 08:52:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:49,811 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-10-28 08:52:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:52:49,811 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-28 08:52:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:49,812 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:52:49,812 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 08:52:49,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 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 08:52:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 08:52:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-28 08:52:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 08:52:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-28 08:52:49,817 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2020-10-28 08:52:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:49,817 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-28 08:52:49,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:52:49,817 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-28 08:52:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 08:52:49,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:49,818 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:49,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:52:49,818 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:49,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:49,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1531866926, now seen corresponding path program 22 times [2020-10-28 08:52:49,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:49,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631352189] [2020-10-28 08:52:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:49,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:54,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:54,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:54,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:52:54,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:54,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:52:54,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:54,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:54,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:52:54,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 08:52:54,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:52:54,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:55,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:55,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:55,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:55,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:55,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:55,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:55,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:55,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:55,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:55,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:55,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 08:52:55,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631352189] [2020-10-28 08:52:55,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:55,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:52:55,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508796804] [2020-10-28 08:52:55,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:52:55,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:55,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:52:55,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:52:55,100 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-10-28 08:52:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:55,288 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-28 08:52:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:52:55,288 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-10-28 08:52:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:55,289 INFO L225 Difference]: With dead ends: 86 [2020-10-28 08:52:55,289 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 08:52:55,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:52:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 08:52:55,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-28 08:52:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 08:52:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-28 08:52:55,296 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-10-28 08:52:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:55,296 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-28 08:52:55,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:52:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-28 08:52:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 08:52:55,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:55,297 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:55,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:52:55,297 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2052783344, now seen corresponding path program 23 times [2020-10-28 08:52:55,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:55,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100152570] [2020-10-28 08:52:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:55,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:00,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 08:53:00,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:00,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 08:53:00,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:00,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:00,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:53:00,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:00,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:53:00,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:00,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:00,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:00,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:00,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:00,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:00,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:00,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:00,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:00,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:00,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:00,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 08:53:00,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100152570] [2020-10-28 08:53:00,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:00,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:53:00,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759386519] [2020-10-28 08:53:00,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:53:00,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:00,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:53:00,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:00,508 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 13 states. [2020-10-28 08:53:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:00,618 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-10-28 08:53:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:53:00,619 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-28 08:53:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:00,620 INFO L225 Difference]: With dead ends: 122 [2020-10-28 08:53:00,620 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 08:53:00,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 08:53:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-28 08:53:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 08:53:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-28 08:53:00,627 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-10-28 08:53:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:00,627 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-28 08:53:00,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:53:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-28 08:53:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:53:00,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:00,628 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:00,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:53:00,628 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash 383695310, now seen corresponding path program 24 times [2020-10-28 08:53:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:00,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240216285] [2020-10-28 08:53:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:00,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:05,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:05,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:53:05,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:05,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:53:05,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:05,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:05,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:53:05,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:53:05,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:53:05,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:05,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:05,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:05,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:05,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:05,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:05,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:05,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:05,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:05,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:05,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:53:05,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240216285] [2020-10-28 08:53:05,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:05,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:53:05,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184028420] [2020-10-28 08:53:05,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:53:05,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:05,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:53:05,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:53:05,956 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 20 states. [2020-10-28 08:53:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:06,139 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-28 08:53:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:53:06,140 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 69 [2020-10-28 08:53:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:06,141 INFO L225 Difference]: With dead ends: 90 [2020-10-28 08:53:06,141 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 08:53:06,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:53:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 08:53:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-28 08:53:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 08:53:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-28 08:53:06,153 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2020-10-28 08:53:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:06,154 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-28 08:53:06,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:53:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-28 08:53:06,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:53:06,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:06,155 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:06,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:53:06,155 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash 367122156, now seen corresponding path program 25 times [2020-10-28 08:53:06,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:06,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780809380] [2020-10-28 08:53:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:11,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 08:53:11,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:11,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:53:11,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:11,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:11,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:53:11,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:53:11,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:53:11,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:11,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:11,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:11,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:11,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:11,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:11,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:11,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:11,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:11,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:11,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:11,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:53:11,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780809380] [2020-10-28 08:53:11,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:11,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:53:11,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361107060] [2020-10-28 08:53:11,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:53:11,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:11,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:53:11,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:53:11,494 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 21 states. [2020-10-28 08:53:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:11,724 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2020-10-28 08:53:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:53:11,725 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2020-10-28 08:53:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:11,726 INFO L225 Difference]: With dead ends: 92 [2020-10-28 08:53:11,726 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 08:53:11,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:53:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 08:53:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-28 08:53:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 08:53:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-28 08:53:11,733 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 71 [2020-10-28 08:53:11,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:11,736 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-28 08:53:11,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:53:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-28 08:53:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 08:53:11,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:11,737 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:11,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:53:11,737 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1620190346, now seen corresponding path program 26 times [2020-10-28 08:53:11,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:11,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170547540] [2020-10-28 08:53:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:11,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:16,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:16,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 08:53:16,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:16,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:53:16,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:16,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:16,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:53:16,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:16,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:53:16,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:16,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:16,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:16,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:16,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:16,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:16,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:16,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:16,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:16,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:16,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:16,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 08:53:16,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170547540] [2020-10-28 08:53:16,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:16,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:53:16,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705348859] [2020-10-28 08:53:16,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:53:16,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:16,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:53:16,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:16,940 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 14 states. [2020-10-28 08:53:17,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:17,106 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2020-10-28 08:53:17,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:53:17,107 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-28 08:53:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:17,108 INFO L225 Difference]: With dead ends: 132 [2020-10-28 08:53:17,108 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 08:53:17,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 08:53:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-28 08:53:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 08:53:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-28 08:53:17,114 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-28 08:53:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:17,115 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-28 08:53:17,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:53:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-28 08:53:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 08:53:17,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:17,116 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:17,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:53:17,116 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:17,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1107313384, now seen corresponding path program 27 times [2020-10-28 08:53:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:17,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2749510] [2020-10-28 08:53:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:17,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:22,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:22,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:53:22,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:22,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:53:22,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:22,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:22,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:53:22,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:53:22,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:53:22,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:22,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:22,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:22,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:22,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:22,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:22,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:22,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:22,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:22,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 08:53:22,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2749510] [2020-10-28 08:53:22,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:22,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:53:22,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745664966] [2020-10-28 08:53:22,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:53:22,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:22,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:53:22,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:53:22,506 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 22 states. [2020-10-28 08:53:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:22,639 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-28 08:53:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:53:22,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2020-10-28 08:53:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:22,641 INFO L225 Difference]: With dead ends: 96 [2020-10-28 08:53:22,641 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 08:53:22,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:53:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 08:53:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-28 08:53:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 08:53:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-28 08:53:22,647 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-28 08:53:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:22,647 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-28 08:53:22,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:53:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-28 08:53:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 08:53:22,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:22,648 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:22,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:53:22,649 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:22,649 INFO L82 PathProgramCache]: Analyzing trace with hash -20610682, now seen corresponding path program 28 times [2020-10-28 08:53:22,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:22,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991034352] [2020-10-28 08:53:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:22,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:27,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:27,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 08:53:27,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:27,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 08:53:27,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:27,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:27,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:53:27,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:27,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:53:27,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:27,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:27,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:27,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:27,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:27,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:27,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:27,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:27,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:27,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 08:53:27,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991034352] [2020-10-28 08:53:27,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:27,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:53:27,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499156025] [2020-10-28 08:53:27,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:53:27,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:27,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:53:27,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:27,881 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 15 states. [2020-10-28 08:53:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:28,047 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-10-28 08:53:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:53:28,047 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2020-10-28 08:53:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:28,049 INFO L225 Difference]: With dead ends: 138 [2020-10-28 08:53:28,050 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 08:53:28,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 08:53:28,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-28 08:53:28,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:53:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-28 08:53:28,055 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-10-28 08:53:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:28,055 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-28 08:53:28,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:53:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-28 08:53:28,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:53:28,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:28,056 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:28,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:53:28,056 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 622936292, now seen corresponding path program 29 times [2020-10-28 08:53:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:28,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085313582] [2020-10-28 08:53:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:28,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:28,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:33,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:33,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:53:33,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:33,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 08:53:33,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:33,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:33,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:53:33,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:53:33,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:53:33,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:33,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:33,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:33,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:33,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:33,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:33,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:33,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:33,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:33,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:33,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:33,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:33,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 08:53:33,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085313582] [2020-10-28 08:53:33,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:33,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:53:33,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653991404] [2020-10-28 08:53:33,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:53:33,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:33,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:53:33,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:53:33,488 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 23 states. [2020-10-28 08:53:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:33,628 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-28 08:53:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:53:33,629 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 79 [2020-10-28 08:53:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:33,630 INFO L225 Difference]: With dead ends: 100 [2020-10-28 08:53:33,630 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 08:53:33,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:53:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 08:53:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-28 08:53:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 08:53:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-28 08:53:33,642 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 79 [2020-10-28 08:53:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:33,642 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-28 08:53:33,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:53:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-28 08:53:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:53:33,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:33,645 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:33,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:53:33,645 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:33,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1650528126, now seen corresponding path program 30 times [2020-10-28 08:53:33,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:33,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849364221] [2020-10-28 08:53:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:33,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:33,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:38,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:38,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:53:38,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:38,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 08:53:38,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:38,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:38,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:53:38,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:53:38,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:53:38,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:39,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:39,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:39,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:39,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:39,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:39,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:39,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:39,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:39,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:39,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:39,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:39,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 08:53:39,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849364221] [2020-10-28 08:53:39,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:39,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:53:39,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786469696] [2020-10-28 08:53:39,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:53:39,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:39,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:53:39,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:53:39,128 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 24 states. [2020-10-28 08:53:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:39,369 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-10-28 08:53:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:53:39,370 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 81 [2020-10-28 08:53:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:39,371 INFO L225 Difference]: With dead ends: 102 [2020-10-28 08:53:39,371 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 08:53:39,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:53:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 08:53:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-28 08:53:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 08:53:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-28 08:53:39,376 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-10-28 08:53:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:39,377 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-28 08:53:39,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:53:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-28 08:53:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:53:39,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:39,378 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:39,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:53:39,378 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:39,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:39,378 INFO L82 PathProgramCache]: Analyzing trace with hash -311480160, now seen corresponding path program 31 times [2020-10-28 08:53:39,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:39,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641788295] [2020-10-28 08:53:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:39,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:39,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:44,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:53:44,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:44,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 08:53:44,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:44,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:44,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:53:44,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:44,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:53:44,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:44,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:44,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:44,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:44,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:44,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:44,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:44,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:44,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:44,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:44,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-28 08:53:44,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641788295] [2020-10-28 08:53:44,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:44,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:53:44,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331811253] [2020-10-28 08:53:44,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:53:44,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:44,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:53:44,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:53:44,613 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 16 states. [2020-10-28 08:53:44,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:44,787 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2020-10-28 08:53:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:53:44,787 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2020-10-28 08:53:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:44,788 INFO L225 Difference]: With dead ends: 148 [2020-10-28 08:53:44,789 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 08:53:44,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:53:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 08:53:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-28 08:53:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 08:53:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-28 08:53:44,799 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2020-10-28 08:53:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:44,799 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-28 08:53:44,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:53:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-28 08:53:44,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 08:53:44,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:44,801 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:44,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:53:44,801 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:44,801 INFO L82 PathProgramCache]: Analyzing trace with hash -699829890, now seen corresponding path program 32 times [2020-10-28 08:53:44,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:44,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467167641] [2020-10-28 08:53:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:44,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:49,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 08:53:49,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:49,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 08:53:49,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:49,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:49,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:53:49,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:53:49,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:53:49,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:50,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:50,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:50,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:50,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:50,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:50,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:50,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:50,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:50,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 08:53:50,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467167641] [2020-10-28 08:53:50,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:50,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:53:50,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974702808] [2020-10-28 08:53:50,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:53:50,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:50,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:53:50,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:53:50,311 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 25 states. [2020-10-28 08:53:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:50,587 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-10-28 08:53:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:53:50,587 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 85 [2020-10-28 08:53:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:50,588 INFO L225 Difference]: With dead ends: 106 [2020-10-28 08:53:50,588 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 08:53:50,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:53:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 08:53:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-28 08:53:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 08:53:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-28 08:53:50,593 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2020-10-28 08:53:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:50,594 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-28 08:53:50,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:53:50,594 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-28 08:53:50,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 08:53:50,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:50,595 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:50,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:53:50,595 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:50,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1518509412, now seen corresponding path program 33 times [2020-10-28 08:53:50,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:50,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359483029] [2020-10-28 08:53:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:50,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:50,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:55,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 08:53:55,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:55,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:53:55,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:55,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:53:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:53:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 08:53:55,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:56,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:56,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:56,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:56,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:56,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:56,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:56,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:56,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:56,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:56,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:56,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:56,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 08:53:56,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359483029] [2020-10-28 08:53:56,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:56,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:53:56,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621993476] [2020-10-28 08:53:56,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:53:56,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:56,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:53:56,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:53:56,128 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 26 states. [2020-10-28 08:53:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:56,279 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-28 08:53:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:53:56,279 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 87 [2020-10-28 08:53:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:56,281 INFO L225 Difference]: With dead ends: 108 [2020-10-28 08:53:56,281 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 08:53:56,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:53:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 08:53:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-28 08:53:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 08:53:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-28 08:53:56,295 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-10-28 08:53:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:56,297 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-28 08:53:56,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:53:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-28 08:53:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 08:53:56,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:56,301 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:56,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:53:56,302 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2004452410, now seen corresponding path program 34 times [2020-10-28 08:53:56,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:56,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459124136] [2020-10-28 08:53:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:56,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:01,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:01,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 08:54:01,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:01,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:54:01,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:01,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:01,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:54:01,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:01,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:54:01,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:01,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:01,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:01,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:01,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:01,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:01,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:01,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:01,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:01,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:01,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-28 08:54:01,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459124136] [2020-10-28 08:54:01,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:01,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:54:01,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508502] [2020-10-28 08:54:01,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:54:01,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:01,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:54:01,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:54:01,553 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 17 states. [2020-10-28 08:54:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:01,672 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-10-28 08:54:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:54:01,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 89 [2020-10-28 08:54:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:01,673 INFO L225 Difference]: With dead ends: 158 [2020-10-28 08:54:01,673 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 08:54:01,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:54:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 08:54:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-28 08:54:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 08:54:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-28 08:54:01,679 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2020-10-28 08:54:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:01,680 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-28 08:54:01,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:54:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-28 08:54:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:54:01,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:01,681 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:01,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:54:01,681 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:01,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:01,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1128998552, now seen corresponding path program 35 times [2020-10-28 08:54:01,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:01,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79724111] [2020-10-28 08:54:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:01,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:01,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:06,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:54:06,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:06,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:54:06,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:06,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:06,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:54:06,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:54:06,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:54:06,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:07,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:07,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:07,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:07,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:07,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:07,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:07,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:07,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:07,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 08:54:07,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79724111] [2020-10-28 08:54:07,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:07,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:54:07,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078820116] [2020-10-28 08:54:07,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:54:07,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:07,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:54:07,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:54:07,162 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 27 states. [2020-10-28 08:54:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:07,449 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-10-28 08:54:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:54:07,450 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 91 [2020-10-28 08:54:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:07,451 INFO L225 Difference]: With dead ends: 112 [2020-10-28 08:54:07,451 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 08:54:07,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:54:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 08:54:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-28 08:54:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 08:54:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-28 08:54:07,457 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2020-10-28 08:54:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:07,457 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-28 08:54:07,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:54:07,457 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-28 08:54:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 08:54:07,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:07,459 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:07,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:54:07,459 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash -656000714, now seen corresponding path program 36 times [2020-10-28 08:54:07,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:07,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414228295] [2020-10-28 08:54:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:07,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:07,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:12,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:12,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 08:54:12,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:12,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:54:12,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:12,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:12,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:54:12,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:12,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:54:12,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:12,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:12,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:12,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:12,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:12,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:12,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:12,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:12,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:12,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-28 08:54:12,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414228295] [2020-10-28 08:54:12,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:12,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:54:12,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459210578] [2020-10-28 08:54:12,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:54:12,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:12,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:54:12,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:54:12,740 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 18 states. [2020-10-28 08:54:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:12,885 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2020-10-28 08:54:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:54:12,886 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 93 [2020-10-28 08:54:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:12,887 INFO L225 Difference]: With dead ends: 164 [2020-10-28 08:54:12,887 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 08:54:12,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:54:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 08:54:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-28 08:54:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 08:54:12,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-28 08:54:12,896 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2020-10-28 08:54:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:12,896 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-28 08:54:12,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:54:12,896 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-28 08:54:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 08:54:12,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:12,898 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:12,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:54:12,898 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:12,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1145273492, now seen corresponding path program 37 times [2020-10-28 08:54:12,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:12,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798857953] [2020-10-28 08:54:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:12,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:12,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:17,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:17,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 08:54:17,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:17,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 08:54:17,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:17,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:54:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:54:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:54:17,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:18,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:18,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:18,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:18,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:18,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:18,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:18,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:18,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:18,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:18,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:18,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:18,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:54:18,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798857953] [2020-10-28 08:54:18,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:18,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:54:18,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545955515] [2020-10-28 08:54:18,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:54:18,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:18,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:54:18,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:54:18,531 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 28 states. [2020-10-28 08:54:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:18,811 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-28 08:54:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:54:18,812 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 95 [2020-10-28 08:54:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:18,813 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:54:18,813 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 08:54:18,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:54:18,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 08:54:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-28 08:54:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 08:54:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-28 08:54:18,820 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2020-10-28 08:54:18,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:18,820 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-28 08:54:18,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:54:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-28 08:54:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 08:54:18,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:18,821 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:18,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:54:18,822 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:18,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2099314738, now seen corresponding path program 38 times [2020-10-28 08:54:18,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:18,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454277845] [2020-10-28 08:54:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:18,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:23,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:23,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 08:54:23,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:23,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 08:54:23,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:23,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:23,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 08:54:23,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:54:23,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 08:54:23,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:24,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:24,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:24,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:24,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:24,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:24,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:24,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:24,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:24,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:24,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:54:24,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454277845] [2020-10-28 08:54:24,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:24,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 08:54:24,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422476883] [2020-10-28 08:54:24,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 08:54:24,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:24,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 08:54:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:54:24,457 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 29 states. [2020-10-28 08:54:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:24,729 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2020-10-28 08:54:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:54:24,729 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 97 [2020-10-28 08:54:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:24,730 INFO L225 Difference]: With dead ends: 118 [2020-10-28 08:54:24,731 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 08:54:24,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:54:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 08:54:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-28 08:54:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 08:54:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-28 08:54:24,736 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-10-28 08:54:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:24,736 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-28 08:54:24,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 08:54:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-28 08:54:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 08:54:24,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:24,737 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:24,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 08:54:24,739 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:24,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:24,740 INFO L82 PathProgramCache]: Analyzing trace with hash -190049200, now seen corresponding path program 39 times [2020-10-28 08:54:24,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:24,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261600629] [2020-10-28 08:54:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:24,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:24,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:29,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:29,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:54:29,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:29,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 08:54:29,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:29,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:54:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:54:29,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:30,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:30,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:30,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:30,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:30,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:30,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:30,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:30,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:30,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:30,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-28 08:54:30,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261600629] [2020-10-28 08:54:30,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:30,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:54:30,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857927686] [2020-10-28 08:54:30,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:54:30,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:30,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:54:30,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:54:30,058 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 19 states. [2020-10-28 08:54:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:30,257 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2020-10-28 08:54:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:54:30,258 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 99 [2020-10-28 08:54:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:30,259 INFO L225 Difference]: With dead ends: 174 [2020-10-28 08:54:30,259 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 08:54:30,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:54:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 08:54:30,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-28 08:54:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 08:54:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-28 08:54:30,265 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2020-10-28 08:54:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:30,265 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-28 08:54:30,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:54:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-28 08:54:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:54:30,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:30,266 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:30,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 08:54:30,267 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1414846766, now seen corresponding path program 40 times [2020-10-28 08:54:30,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:30,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495834864] [2020-10-28 08:54:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:30,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:30,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:35,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:35,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:54:35,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:35,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:54:35,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:35,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:35,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 08:54:35,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 08:54:35,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:54:35,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:35,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:35,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:35,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:35,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:35,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:35,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:35,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:35,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:35,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 08:54:35,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495834864] [2020-10-28 08:54:35,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:35,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 08:54:35,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2974273] [2020-10-28 08:54:35,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 08:54:35,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:35,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 08:54:35,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:54:35,926 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 30 states. [2020-10-28 08:54:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:36,212 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2020-10-28 08:54:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 08:54:36,212 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 101 [2020-10-28 08:54:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:36,213 INFO L225 Difference]: With dead ends: 122 [2020-10-28 08:54:36,213 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 08:54:36,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:54:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 08:54:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-28 08:54:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 08:54:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-28 08:54:36,219 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2020-10-28 08:54:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:36,219 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-28 08:54:36,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 08:54:36,219 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-28 08:54:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 08:54:36,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:36,220 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:36,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 08:54:36,220 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:36,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:36,221 INFO L82 PathProgramCache]: Analyzing trace with hash -833774004, now seen corresponding path program 41 times [2020-10-28 08:54:36,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:36,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729396614] [2020-10-28 08:54:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:36,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:36,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:41,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:41,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 08:54:41,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:41,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 08:54:41,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:41,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:54:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:41,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:54:41,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:41,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:41,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:41,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:41,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:41,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:41,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:54:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-28 08:54:41,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729396614] [2020-10-28 08:54:41,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:41,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:54:41,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602788377] [2020-10-28 08:54:41,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:54:41,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:41,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:54:41,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:54:41,652 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 20 states. [2020-10-28 08:54:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:41,844 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2020-10-28 08:54:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:54:41,844 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-10-28 08:54:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:41,845 INFO L225 Difference]: With dead ends: 180 [2020-10-28 08:54:41,845 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 08:54:41,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:54:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 08:54:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-28 08:54:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 08:54:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-28 08:54:41,851 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2020-10-28 08:54:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:41,851 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-28 08:54:41,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:54:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-28 08:54:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 08:54:41,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:41,853 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:41,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 08:54:41,853 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:41,853 INFO L82 PathProgramCache]: Analyzing trace with hash -265501654, now seen corresponding path program 42 times [2020-10-28 08:54:41,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:41,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199916793] [2020-10-28 08:54:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:41,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:41,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:46,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:46,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 08:54:46,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:46,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 08:54:46,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:46,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 08:54:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 08:54:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:54:46,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:47,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:47,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:47,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:47,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:47,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:47,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:47,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 08:54:47,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199916793] [2020-10-28 08:54:47,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:47,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:54:47,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628624928] [2020-10-28 08:54:47,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:54:47,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:47,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:54:47,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:54:47,540 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 31 states. [2020-10-28 08:54:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:47,867 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2020-10-28 08:54:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:54:47,868 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 105 [2020-10-28 08:54:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:47,869 INFO L225 Difference]: With dead ends: 126 [2020-10-28 08:54:47,869 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 08:54:47,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:54:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 08:54:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-28 08:54:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 08:54:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-28 08:54:47,876 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2020-10-28 08:54:47,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:47,876 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-28 08:54:47,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:54:47,877 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-28 08:54:47,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 08:54:47,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:47,878 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:47,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 08:54:47,878 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:47,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:47,879 INFO L82 PathProgramCache]: Analyzing trace with hash -740902328, now seen corresponding path program 43 times [2020-10-28 08:54:47,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:47,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017317199] [2020-10-28 08:54:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:52,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:52,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 08:54:52,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:52,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 08:54:52,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:52,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:52,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:54:52,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 08:54:52,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 08:54:52,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:53,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:53,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:53,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:53,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:53,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:53,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:53,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:53,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:53,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:53,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:53,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:53,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 08:54:53,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017317199] [2020-10-28 08:54:53,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:53,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:54:53,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806664905] [2020-10-28 08:54:53,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:54:53,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:53,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:54:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:54:53,681 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 32 states. [2020-10-28 08:54:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:53,866 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2020-10-28 08:54:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 08:54:53,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 107 [2020-10-28 08:54:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:53,868 INFO L225 Difference]: With dead ends: 128 [2020-10-28 08:54:53,868 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 08:54:53,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:54:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 08:54:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-28 08:54:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 08:54:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-28 08:54:53,874 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-10-28 08:54:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:53,874 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-28 08:54:53,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:54:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-28 08:54:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 08:54:53,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:53,875 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:53,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 08:54:53,876 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:53,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:53,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1960550630, now seen corresponding path program 44 times [2020-10-28 08:54:53,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:53,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735665609] [2020-10-28 08:54:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:53,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:58,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 08:54:58,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:58,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:54:58,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:58,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:58,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:54:58,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:58,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:54:58,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:59,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:59,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:59,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:59,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:59,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:59,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:59,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:59,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:59,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:59,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:59,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:59,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-28 08:54:59,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735665609] [2020-10-28 08:54:59,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:59,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:54:59,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973263345] [2020-10-28 08:54:59,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:54:59,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:54:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:54:59,231 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 21 states. [2020-10-28 08:54:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:59,377 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2020-10-28 08:54:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:54:59,377 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-10-28 08:54:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:59,379 INFO L225 Difference]: With dead ends: 190 [2020-10-28 08:54:59,379 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 08:54:59,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:54:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 08:54:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-28 08:54:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 08:54:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-28 08:54:59,386 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 109 [2020-10-28 08:54:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:59,386 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-28 08:54:59,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:54:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-28 08:54:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 08:54:59,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:59,387 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:59,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 08:54:59,387 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:59,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1716361148, now seen corresponding path program 45 times [2020-10-28 08:54:59,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:59,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916610703] [2020-10-28 08:54:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY