/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:25:06,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:25:06,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:25:06,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:25:06,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:25:06,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:25:06,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:25:06,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:25:06,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:25:06,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:25:06,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:25:06,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:25:06,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:25:06,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:25:06,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:25:06,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:25:06,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:25:06,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:25:06,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:25:06,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:25:06,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:25:06,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:25:06,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:25:06,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:25:06,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:25:06,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:25:06,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:25:06,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:25:06,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:25:06,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:25:06,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:25:06,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:25:06,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:25:06,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:25:06,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:25:06,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:25:06,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:25:06,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:25:06,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:25:06,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:25:06,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:25:06,453 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 [2020-10-26 19:25:06,513 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:25:06,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:25:06,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:25:06,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:25:06,519 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:25:06,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:25:06,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:25:06,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:25:06,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:25:06,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:25:06,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:25:06,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:25:06,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:25:06,523 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:25:06,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:25:06,523 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:25:06,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:25:06,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:25:06,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:25:06,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:25:06,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:25:06,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:06,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:25:06,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:25:06,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:25:06,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:25:06,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:25:06,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:25:06,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:25:06,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:25:06,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:25:07,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:25:07,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:25:07,029 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:25:07,030 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:25:07,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2020-10-26 19:25:07,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f287aabf8/d79bf1d3a18d41f9811b208899adc0ff/FLAGe5245e37a [2020-10-26 19:25:07,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:25:07,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2020-10-26 19:25:07,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f287aabf8/d79bf1d3a18d41f9811b208899adc0ff/FLAGe5245e37a [2020-10-26 19:25:08,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f287aabf8/d79bf1d3a18d41f9811b208899adc0ff [2020-10-26 19:25:08,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:25:08,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:25:08,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:08,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:25:08,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:25:08,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:08" (1/1) ... [2020-10-26 19:25:08,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3407df7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08, skipping insertion in model container [2020-10-26 19:25:08,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:08" (1/1) ... [2020-10-26 19:25:08,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:25:08,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:25:08,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:08,414 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:25:08,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:08,458 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:25:08,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08 WrapperNode [2020-10-26 19:25:08,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:08,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:25:08,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:25:08,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:25:08,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08" (1/1) ... [2020-10-26 19:25:08,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08" (1/1) ... [2020-10-26 19:25:08,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08" (1/1) ... [2020-10-26 19:25:08,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08" (1/1) ... [2020-10-26 19:25:08,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08" (1/1) ... [2020-10-26 19:25:08,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08" (1/1) ... [2020-10-26 19:25:08,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08" (1/1) ... [2020-10-26 19:25:08,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:25:08,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:25:08,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:25:08,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:25:08,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08" (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 [2020-10-26 19:25:08,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:25:08,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:25:08,591 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:25:08,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:25:08,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:25:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:25:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:25:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:25:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:25:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:25:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:25:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:25:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:25:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:25:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:25:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:25:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:25:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:25:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:25:08,946 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:25:08,947 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 19:25:08,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:08 BoogieIcfgContainer [2020-10-26 19:25:08,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:25:08,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:25:08,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:25:08,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:25:08,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:25:08" (1/3) ... [2020-10-26 19:25:08,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecd34b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:08, skipping insertion in model container [2020-10-26 19:25:08,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:08" (2/3) ... [2020-10-26 19:25:08,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecd34b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:08, skipping insertion in model container [2020-10-26 19:25:08,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:08" (3/3) ... [2020-10-26 19:25:08,983 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2020-10-26 19:25:09,007 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:25:09,016 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:25:09,059 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:25:09,095 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:25:09,095 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:25:09,095 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:25:09,096 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:25:09,096 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:25:09,096 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:25:09,097 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:25:09,097 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:25:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-26 19:25:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:25:09,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:09,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:09,129 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash -18791634, now seen corresponding path program 1 times [2020-10-26 19:25:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:09,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093513307] [2020-10-26 19:25:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:09,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:09,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:09,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:09,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:09,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:09,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:25:09,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:09,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-26 19:25:09,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:09,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:25:09,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:09,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:25:09,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:25:10,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:10,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:10,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:10,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:10,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:25:10,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:10,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:10,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:25:10,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093513307] [2020-10-26 19:25:10,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:25:10,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:25:10,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162498811] [2020-10-26 19:25:10,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:25:10,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:25:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:10,146 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-26 19:25:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:10,330 INFO L93 Difference]: Finished difference Result 62 states and 92 transitions. [2020-10-26 19:25:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:25:10,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-26 19:25:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:10,341 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:25:10,341 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 19:25:10,345 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 [2020-10-26 19:25:10,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 19:25:10,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-26 19:25:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:25:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:25:10,393 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-10-26 19:25:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:10,394 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:25:10,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:25:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:25:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:25:10,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:10,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:10,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:25:10,396 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:10,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159768, now seen corresponding path program 1 times [2020-10-26 19:25:10,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:10,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93942098] [2020-10-26 19:25:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:10,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:14,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:14,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:25:14,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:14,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3750 [2020-10-26 19:25:14,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:25:14,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:14,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:25:14,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:14,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:14,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:14,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:14,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:14,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:14,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:14,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:14,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:14,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:14,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:14,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:25:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:25:14,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93942098] [2020-10-26 19:25:14,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:14,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:25:14,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333113114] [2020-10-26 19:25:14,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:25:14,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:14,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:25:14,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:14,312 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-10-26 19:25:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:14,482 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-26 19:25:14,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:25:14,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-26 19:25:14,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:14,483 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:25:14,484 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:25:14,487 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 [2020-10-26 19:25:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:25:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-26 19:25:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:25:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:25:14,507 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 25 [2020-10-26 19:25:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:14,508 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:25:14,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:25:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:25:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:25:14,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:14,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:14,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:25:14,511 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:14,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:14,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2050662806, now seen corresponding path program 2 times [2020-10-26 19:25:14,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:14,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164237315] [2020-10-26 19:25:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:14,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:14,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:14,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:14,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:15,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:19,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:19,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:25:19,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:19,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:25:19,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:19,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:25:19,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:19,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:25:19,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:19,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:19,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:19,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:19,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:19,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:19,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:19,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:19,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:19,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:19,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:19,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:25:19,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164237315] [2020-10-26 19:25:19,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:19,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:25:19,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701207827] [2020-10-26 19:25:19,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:25:19,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:19,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:25:19,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:19,639 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-10-26 19:25:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:19,810 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-26 19:25:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:25:19,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-26 19:25:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:19,812 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:25:19,812 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:25:19,813 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 [2020-10-26 19:25:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:25:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-26 19:25:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:25:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:25:19,822 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2020-10-26 19:25:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:19,822 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:25:19,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:25:19,823 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:25:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:25:19,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:19,824 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:19,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:25:19,825 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:19,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1849014952, now seen corresponding path program 3 times [2020-10-26 19:25:19,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:19,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766178097] [2020-10-26 19:25:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:19,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:19,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:19,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:19,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:21,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:24,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:24,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:25:24,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:24,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:25:24,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:25:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:25:24,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:24,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:24,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:24,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:24,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:24,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:24,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:25:24,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:24,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:24,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:24,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:24,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:25:24,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766178097] [2020-10-26 19:25:24,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:24,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:25:24,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656774478] [2020-10-26 19:25:24,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:25:24,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:24,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:25:24,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:24,934 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2020-10-26 19:25:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:25,088 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-26 19:25:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:25:25,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-26 19:25:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:25,090 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:25:25,090 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:25:25,091 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 [2020-10-26 19:25:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:25:25,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 19:25:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:25:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:25:25,112 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2020-10-26 19:25:25,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:25,112 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:25:25,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:25:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:25:25,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:25:25,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:25,114 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:25,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:25:25,117 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:25,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:25,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1815544746, now seen corresponding path program 4 times [2020-10-26 19:25:25,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:25,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841739095] [2020-10-26 19:25:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:25,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:25,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:25,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:25,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:27,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:30,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:25:30,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:30,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:25:30,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:25:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:25:30,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:30,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:30,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:30,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:30,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:30,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:30,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:30,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:30,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:30,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:30,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 19:25:30,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841739095] [2020-10-26 19:25:30,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:30,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:25:30,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327203323] [2020-10-26 19:25:30,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:25:30,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:30,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:25:30,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:25:30,256 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2020-10-26 19:25:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:30,416 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-10-26 19:25:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:25:30,416 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-26 19:25:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:30,417 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:25:30,417 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:25:30,418 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 [2020-10-26 19:25:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:25:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-26 19:25:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:25:30,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-26 19:25:30,426 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-10-26 19:25:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:30,427 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-26 19:25:30,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:25:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-26 19:25:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:25:30,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:30,428 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:30,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:25:30,429 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1640122136, now seen corresponding path program 5 times [2020-10-26 19:25:30,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:30,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395779898] [2020-10-26 19:25:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:30,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:34,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:35,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:25:35,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:35,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:25:35,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:25:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:25:35,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:35,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:35,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:35,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:35,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:25:35,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:35,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:35,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:25:35,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395779898] [2020-10-26 19:25:35,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:35,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:25:35,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895012782] [2020-10-26 19:25:35,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:25:35,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:35,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:25:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:25:35,565 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 9 states. [2020-10-26 19:25:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:35,700 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-26 19:25:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:25:35,701 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-26 19:25:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:35,702 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:25:35,702 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:25:35,702 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 [2020-10-26 19:25:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:25:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-26 19:25:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:25:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:25:35,714 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2020-10-26 19:25:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:35,716 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:25:35,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:25:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:25:35,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:25:35,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:35,719 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:35,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:25:35,723 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:35,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:35,723 INFO L82 PathProgramCache]: Analyzing trace with hash 325196010, now seen corresponding path program 6 times [2020-10-26 19:25:35,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:35,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215323005] [2020-10-26 19:25:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:35,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:40,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:40,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:25:40,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:40,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:25:40,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:25:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:25:40,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:40,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:40,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:40,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:40,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:40,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:40,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:40,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:40,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-26 19:25:40,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215323005] [2020-10-26 19:25:40,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:40,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:25:40,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692231276] [2020-10-26 19:25:40,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:25:40,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:40,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:25:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:25:40,881 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 10 states. [2020-10-26 19:25:41,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:41,042 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-26 19:25:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:25:41,043 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-26 19:25:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:41,044 INFO L225 Difference]: With dead ends: 91 [2020-10-26 19:25:41,044 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:25:41,045 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 [2020-10-26 19:25:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:25:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-26 19:25:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:25:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 19:25:41,059 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 45 [2020-10-26 19:25:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:41,060 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 19:25:41,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:25:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 19:25:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:25:41,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:41,064 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:41,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:25:41,064 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:41,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1104640216, now seen corresponding path program 7 times [2020-10-26 19:25:41,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:41,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726106624] [2020-10-26 19:25:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:41,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:46,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:25:46,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:46,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:25:46,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:25:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:25:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:46,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:46,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:46,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:46,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:46,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:25:46,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:46,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:46,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-26 19:25:46,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726106624] [2020-10-26 19:25:46,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:46,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:25:46,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84277742] [2020-10-26 19:25:46,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:25:46,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:46,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:25:46,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:25:46,266 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 11 states. [2020-10-26 19:25:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:46,456 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2020-10-26 19:25:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:25:46,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-10-26 19:25:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:46,457 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:25:46,458 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:25:46,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:25:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:25:46,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-26 19:25:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:25:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-26 19:25:46,477 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2020-10-26 19:25:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:46,478 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-26 19:25:46,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:25:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-26 19:25:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:25:46,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:46,482 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:46,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:25:46,482 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:46,483 INFO L82 PathProgramCache]: Analyzing trace with hash -142696918, now seen corresponding path program 8 times [2020-10-26 19:25:46,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:46,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92517974] [2020-10-26 19:25:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:46,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:51,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:51,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:25:51,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:51,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:25:51,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:51,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:25:51,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:51,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:25:51,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:51,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:51,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:51,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:51,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:51,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:51,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:51,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:51,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 19:25:51,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92517974] [2020-10-26 19:25:51,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:51,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:25:51,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032654878] [2020-10-26 19:25:51,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:25:51,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:51,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:25:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:25:51,735 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2020-10-26 19:25:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:51,924 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-10-26 19:25:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:25:51,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-26 19:25:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:51,925 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:25:51,925 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:25:51,926 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 [2020-10-26 19:25:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:25:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-26 19:25:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:25:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 19:25:51,935 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 53 [2020-10-26 19:25:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:51,935 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 19:25:51,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:25:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 19:25:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:25:51,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:51,936 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:51,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:25:51,937 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:51,937 INFO L82 PathProgramCache]: Analyzing trace with hash 958276968, now seen corresponding path program 9 times [2020-10-26 19:25:51,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:51,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574571422] [2020-10-26 19:25:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:51,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:56,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:56,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:25:56,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:25:56,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:25:56,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:25:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:25:56,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:57,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:57,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:57,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:57,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:57,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:25:57,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:57,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:57,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:57,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:57,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-26 19:25:57,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574571422] [2020-10-26 19:25:57,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:57,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:25:57,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902348994] [2020-10-26 19:25:57,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:25:57,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:57,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:25:57,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:25:57,160 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 13 states. [2020-10-26 19:25:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:57,385 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2020-10-26 19:25:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:25:57,386 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-26 19:25:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:57,387 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:25:57,387 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:25:57,388 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 [2020-10-26 19:25:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:25:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-26 19:25:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:25:57,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 19:25:57,396 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 57 [2020-10-26 19:25:57,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:57,397 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 19:25:57,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:25:57,397 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 19:25:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:25:57,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:57,398 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:57,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:25:57,398 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:57,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1975817066, now seen corresponding path program 10 times [2020-10-26 19:25:57,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:57,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891138499] [2020-10-26 19:25:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:57,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:02,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:26:02,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:02,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:26:02,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:26:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:26:02,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:02,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:02,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:02,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:02,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:02,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:02,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-26 19:26:02,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891138499] [2020-10-26 19:26:02,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:02,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:26:02,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257785470] [2020-10-26 19:26:02,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:26:02,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:02,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:26:02,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:02,623 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 14 states. [2020-10-26 19:26:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:02,859 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2020-10-26 19:26:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:26:02,859 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-26 19:26:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:02,860 INFO L225 Difference]: With dead ends: 119 [2020-10-26 19:26:02,860 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:26:02,861 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 [2020-10-26 19:26:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:26:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-26 19:26:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:26:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-26 19:26:02,869 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 61 [2020-10-26 19:26:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:02,869 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-26 19:26:02,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:26:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-26 19:26:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:26:02,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:02,871 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:02,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:26:02,871 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:02,872 INFO L82 PathProgramCache]: Analyzing trace with hash -381250648, now seen corresponding path program 11 times [2020-10-26 19:26:02,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:02,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417285394] [2020-10-26 19:26:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:02,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:04,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:07,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:07,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:26:07,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:07,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:26:07,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:26:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:26:07,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:08,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:08,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:08,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:08,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:08,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:08,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:08,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:08,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:08,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:08,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-26 19:26:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417285394] [2020-10-26 19:26:08,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:08,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:26:08,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974165782] [2020-10-26 19:26:08,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:26:08,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:08,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:26:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:08,118 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 15 states. [2020-10-26 19:26:08,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:08,381 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2020-10-26 19:26:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:26:08,381 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-26 19:26:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:08,383 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:26:08,383 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:26:08,384 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 [2020-10-26 19:26:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:26:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-26 19:26:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:26:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 19:26:08,392 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 65 [2020-10-26 19:26:08,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:08,392 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 19:26:08,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:26:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 19:26:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:26:08,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:08,393 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:08,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:26:08,394 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:08,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1282144426, now seen corresponding path program 12 times [2020-10-26 19:26:08,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:08,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11299408] [2020-10-26 19:26:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:08,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:10,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:13,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:13,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:26:13,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:13,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:26:13,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:13,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:26:13,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:13,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:26:13,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:13,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:13,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:13,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:13,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:13,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:13,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:13,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:13,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:13,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:13,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:13,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-26 19:26:13,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11299408] [2020-10-26 19:26:13,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:13,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:26:13,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697237659] [2020-10-26 19:26:13,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:26:13,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:26:13,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:13,696 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 16 states. [2020-10-26 19:26:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:14,009 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2020-10-26 19:26:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:26:14,009 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-26 19:26:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:14,010 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:26:14,010 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:26:14,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:26:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-26 19:26:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:26:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-26 19:26:14,032 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 69 [2020-10-26 19:26:14,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:14,033 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-26 19:26:14,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:26:14,033 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-26 19:26:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:26:14,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:14,034 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:14,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:26:14,035 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1748381208, now seen corresponding path program 13 times [2020-10-26 19:26:14,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:14,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21910108] [2020-10-26 19:26:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:14,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:26:19,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:19,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:26:19,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:26:19,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:19,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:26:19,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:19,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:19,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:19,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:19,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:19,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:19,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:19,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-10-26 19:26:19,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21910108] [2020-10-26 19:26:19,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:19,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:26:19,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813499033] [2020-10-26 19:26:19,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:26:19,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:19,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:26:19,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:19,313 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2020-10-26 19:26:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:19,545 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2020-10-26 19:26:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:26:19,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-10-26 19:26:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:19,546 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:26:19,546 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:26:19,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:26:19,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-26 19:26:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:26:19,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:26:19,553 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 73 [2020-10-26 19:26:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:19,554 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:26:19,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:26:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:26:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:26:19,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:19,555 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:19,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:26:19,555 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash 447532522, now seen corresponding path program 14 times [2020-10-26 19:26:19,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:19,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440423898] [2020-10-26 19:26:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:19,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:24,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:24,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:26:24,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:24,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:26:24,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:24,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:26:24,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:24,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:26:24,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:24,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:24,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:24,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:24,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:24,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:24,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:24,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:24,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:24,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:24,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:24,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-26 19:26:24,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440423898] [2020-10-26 19:26:24,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:24,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:26:24,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019226793] [2020-10-26 19:26:24,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:26:24,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:24,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:26:24,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:24,858 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 18 states. [2020-10-26 19:26:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:25,161 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2020-10-26 19:26:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:26:25,162 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-10-26 19:26:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:25,162 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:26:25,162 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:26:25,163 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 [2020-10-26 19:26:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:26:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-26 19:26:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:26:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-26 19:26:25,183 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 77 [2020-10-26 19:26:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:25,183 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-26 19:26:25,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:26:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-26 19:26:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:26:25,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:25,185 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:25,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:26:25,186 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:25,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2093998120, now seen corresponding path program 15 times [2020-10-26 19:26:25,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:25,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113938245] [2020-10-26 19:26:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:25,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:30,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:26:30,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:30,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:26:30,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:26:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:26:30,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:30,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:30,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:30,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:30,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:30,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:30,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:30,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:30,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:30,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-26 19:26:30,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113938245] [2020-10-26 19:26:30,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:30,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:26:30,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696709224] [2020-10-26 19:26:30,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:26:30,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:30,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:26:30,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:30,521 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 19 states. [2020-10-26 19:26:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:30,816 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2020-10-26 19:26:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:26:30,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-26 19:26:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:30,818 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:26:30,818 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:26:30,819 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 [2020-10-26 19:26:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:26:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-26 19:26:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:26:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-26 19:26:30,828 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 81 [2020-10-26 19:26:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:30,829 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-26 19:26:30,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:26:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-26 19:26:30,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:26:30,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:30,832 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:30,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:26:30,832 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:30,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:30,833 INFO L82 PathProgramCache]: Analyzing trace with hash -524348630, now seen corresponding path program 16 times [2020-10-26 19:26:30,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:30,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557399839] [2020-10-26 19:26:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:30,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:35,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:35,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:35,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:26:35,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:35,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:26:35,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:35,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:26:35,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:35,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:26:35,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:36,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:36,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:36,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:36,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:36,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:26:36,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:36,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:36,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:36,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:36,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-10-26 19:26:36,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557399839] [2020-10-26 19:26:36,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:36,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:26:36,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786338716] [2020-10-26 19:26:36,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:26:36,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:36,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:26:36,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:26:36,177 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2020-10-26 19:26:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:36,486 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-10-26 19:26:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:26:36,487 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-10-26 19:26:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:36,488 INFO L225 Difference]: With dead ends: 161 [2020-10-26 19:26:36,488 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:26:36,489 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 [2020-10-26 19:26:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:26:36,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-26 19:26:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:26:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-26 19:26:36,506 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 85 [2020-10-26 19:26:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:36,507 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-26 19:26:36,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:26:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-26 19:26:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:26:36,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:36,508 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:36,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:26:36,508 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:36,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:36,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1082081688, now seen corresponding path program 17 times [2020-10-26 19:26:36,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:36,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427113475] [2020-10-26 19:26:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:36,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:41,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:26:41,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:26:41,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:26:41,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:41,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:26:41,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:41,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:26:41,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:41,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:41,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:41,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:41,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:41,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:26:41,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:41,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-10-26 19:26:41,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427113475] [2020-10-26 19:26:41,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:41,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:26:41,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305719598] [2020-10-26 19:26:41,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:26:41,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:41,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:26:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:26:41,880 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 21 states. [2020-10-26 19:26:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:42,090 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2020-10-26 19:26:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:26:42,091 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-10-26 19:26:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:42,092 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:26:42,092 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:26:42,094 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 [2020-10-26 19:26:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:26:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-26 19:26:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:26:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-26 19:26:42,101 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 89 [2020-10-26 19:26:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:42,102 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-26 19:26:42,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:26:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-26 19:26:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:26:42,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:42,103 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:42,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:26:42,103 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:42,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2145044586, now seen corresponding path program 18 times [2020-10-26 19:26:42,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:42,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381686296] [2020-10-26 19:26:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:42,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:47,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:26:47,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:26:47,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:26:47,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:26:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:26:47,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:47,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:47,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:47,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:47,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:47,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:47,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:47,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-10-26 19:26:47,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381686296] [2020-10-26 19:26:47,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:47,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:26:47,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000052249] [2020-10-26 19:26:47,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:26:47,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:47,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:26:47,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:26:47,544 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 22 states. [2020-10-26 19:26:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:47,860 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2020-10-26 19:26:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:26:47,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2020-10-26 19:26:47,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:47,862 INFO L225 Difference]: With dead ends: 175 [2020-10-26 19:26:47,862 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:26:47,863 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 [2020-10-26 19:26:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:26:47,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-26 19:26:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:26:47,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:26:47,870 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 93 [2020-10-26 19:26:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:47,870 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:26:47,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:26:47,871 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:26:47,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:26:47,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:47,872 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:47,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:26:47,872 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash -167482200, now seen corresponding path program 19 times [2020-10-26 19:26:47,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:47,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331268124] [2020-10-26 19:26:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:47,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:52,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:52,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:26:52,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:26:52,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:26:52,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:52,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:26:52,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:52,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:26:52,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:53,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:53,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:53,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:53,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:53,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:53,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:53,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:53,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:53,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-26 19:26:53,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331268124] [2020-10-26 19:26:53,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:53,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:26:53,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242936257] [2020-10-26 19:26:53,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:26:53,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:53,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:26:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:26:53,319 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2020-10-26 19:26:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:53,616 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2020-10-26 19:26:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:26:53,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-10-26 19:26:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:53,618 INFO L225 Difference]: With dead ends: 182 [2020-10-26 19:26:53,618 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:26:53,619 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 [2020-10-26 19:26:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:26:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-26 19:26:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:26:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-26 19:26:53,627 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 97 [2020-10-26 19:26:53,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:53,627 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-26 19:26:53,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:26:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-26 19:26:53,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:26:53,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:53,628 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:53,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:26:53,629 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:53,629 INFO L82 PathProgramCache]: Analyzing trace with hash 976743850, now seen corresponding path program 20 times [2020-10-26 19:26:53,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:53,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867494629] [2020-10-26 19:26:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:53,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:58,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:58,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:26:58,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:26:58,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:26:58,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:58,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:26:58,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:58,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:26:58,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:59,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:59,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:59,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:59,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:59,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:26:59,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:59,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:59,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:59,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:59,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-26 19:26:59,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867494629] [2020-10-26 19:26:59,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:59,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:26:59,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967729657] [2020-10-26 19:26:59,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:26:59,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:59,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:26:59,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:26:59,094 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 24 states. [2020-10-26 19:26:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:59,491 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2020-10-26 19:26:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:26:59,492 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 101 [2020-10-26 19:26:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:59,493 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:26:59,493 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:26:59,494 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 [2020-10-26 19:26:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:26:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-26 19:26:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:26:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-26 19:26:59,509 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 101 [2020-10-26 19:26:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:59,510 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-26 19:26:59,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:26:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-26 19:26:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:26:59,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:59,511 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:59,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:26:59,511 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:59,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1518146840, now seen corresponding path program 21 times [2020-10-26 19:26:59,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:59,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53939592] [2020-10-26 19:26:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:59,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:04,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:04,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:27:04,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:04,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:27:04,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:27:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:27:04,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:04,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:04,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:04,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:04,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:04,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:04,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:04,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:04,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2020-10-26 19:27:04,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53939592] [2020-10-26 19:27:04,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:04,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:27:04,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541773016] [2020-10-26 19:27:04,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:27:04,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:04,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:27:04,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:04,984 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 25 states. [2020-10-26 19:27:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:05,321 INFO L93 Difference]: Finished difference Result 196 states and 207 transitions. [2020-10-26 19:27:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:27:05,323 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 105 [2020-10-26 19:27:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:05,324 INFO L225 Difference]: With dead ends: 196 [2020-10-26 19:27:05,324 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:27:05,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:27:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-26 19:27:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:27:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-26 19:27:05,334 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 105 [2020-10-26 19:27:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:05,334 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-26 19:27:05,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:27:05,334 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-26 19:27:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:27:05,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:05,336 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:05,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:27:05,336 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:05,336 INFO L82 PathProgramCache]: Analyzing trace with hash 856589034, now seen corresponding path program 22 times [2020-10-26 19:27:05,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:05,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949022819] [2020-10-26 19:27:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:05,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:10,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:10,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:27:10,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:10,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:27:10,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:27:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:27:10,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:10,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:10,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:10,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:10,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:10,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:10,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:10,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:10,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:10,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:10,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2020-10-26 19:27:10,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949022819] [2020-10-26 19:27:10,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:10,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:27:10,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577659896] [2020-10-26 19:27:10,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:27:10,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:10,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:27:10,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:10,883 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 26 states. [2020-10-26 19:27:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:11,244 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2020-10-26 19:27:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:27:11,244 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 109 [2020-10-26 19:27:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:11,245 INFO L225 Difference]: With dead ends: 203 [2020-10-26 19:27:11,245 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:27:11,246 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 [2020-10-26 19:27:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:27:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-26 19:27:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:27:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-26 19:27:11,253 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 109 [2020-10-26 19:27:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:11,253 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-26 19:27:11,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:27:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-26 19:27:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:27:11,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:11,254 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:11,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:27:11,255 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1037813464, now seen corresponding path program 23 times [2020-10-26 19:27:11,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:11,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339739805] [2020-10-26 19:27:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:11,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:16,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:27:16,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:16,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:27:16,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:27:16,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:16,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:27:16,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:16,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:16,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:16,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:16,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:16,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:16,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:16,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2020-10-26 19:27:16,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339739805] [2020-10-26 19:27:16,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:16,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:27:16,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080958424] [2020-10-26 19:27:16,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:27:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:27:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:16,812 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 27 states. [2020-10-26 19:27:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:17,180 INFO L93 Difference]: Finished difference Result 210 states and 221 transitions. [2020-10-26 19:27:17,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:27:17,181 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 113 [2020-10-26 19:27:17,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:17,182 INFO L225 Difference]: With dead ends: 210 [2020-10-26 19:27:17,182 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:27:17,183 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 [2020-10-26 19:27:17,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:27:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-26 19:27:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:27:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-26 19:27:17,191 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 113 [2020-10-26 19:27:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:17,191 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-26 19:27:17,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:27:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-26 19:27:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:27:17,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:17,193 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:17,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:27:17,193 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:17,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:17,194 INFO L82 PathProgramCache]: Analyzing trace with hash -292124630, now seen corresponding path program 24 times [2020-10-26 19:27:17,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:17,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179445840] [2020-10-26 19:27:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:22,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:22,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:27:22,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:22,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:27:22,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:27:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:27:22,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:22,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:22,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:22,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:22,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:22,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:22,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:22,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:22,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:22,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:22,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:22,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-26 19:27:22,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179445840] [2020-10-26 19:27:22,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:22,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:27:22,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702355632] [2020-10-26 19:27:22,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:27:22,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:22,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:27:22,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:22,780 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 28 states. [2020-10-26 19:27:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:23,212 INFO L93 Difference]: Finished difference Result 217 states and 228 transitions. [2020-10-26 19:27:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:27:23,213 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 117 [2020-10-26 19:27:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:23,215 INFO L225 Difference]: With dead ends: 217 [2020-10-26 19:27:23,215 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:27:23,216 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 [2020-10-26 19:27:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:27:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-26 19:27:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:27:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-26 19:27:23,224 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 117 [2020-10-26 19:27:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:23,224 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-26 19:27:23,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:27:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-26 19:27:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 19:27:23,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:23,226 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:23,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:27:23,226 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:23,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:23,227 INFO L82 PathProgramCache]: Analyzing trace with hash 789600104, now seen corresponding path program 25 times [2020-10-26 19:27:23,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:23,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880645043] [2020-10-26 19:27:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:23,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:28,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:28,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 19:27:28,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:28,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:27:28,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:28,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:27:28,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:28,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:27:28,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:28,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:28,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:28,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:28,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:28,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:28,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:27:28,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:28,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:28,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:28,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:28,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2020-10-26 19:27:28,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880645043] [2020-10-26 19:27:28,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:28,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:27:28,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396024338] [2020-10-26 19:27:28,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:27:28,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:28,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:27:28,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:28,899 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 29 states. [2020-10-26 19:27:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:29,227 INFO L93 Difference]: Finished difference Result 224 states and 235 transitions. [2020-10-26 19:27:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:27:29,228 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 121 [2020-10-26 19:27:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:29,229 INFO L225 Difference]: With dead ends: 224 [2020-10-26 19:27:29,229 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:27:29,230 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 [2020-10-26 19:27:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:27:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-26 19:27:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:27:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-10-26 19:27:29,246 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 121 [2020-10-26 19:27:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:29,247 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-10-26 19:27:29,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:27:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-10-26 19:27:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:27:29,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:29,251 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:29,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:27:29,251 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash -771228310, now seen corresponding path program 26 times [2020-10-26 19:27:29,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:29,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034542360] [2020-10-26 19:27:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:29,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:29,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:29,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:34,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:34,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:27:34,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:34,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:27:34,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:34,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:27:34,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:34,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:27:34,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:34,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:34,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:34,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:34,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:34,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:34,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:34,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:34,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:34,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:34,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:34,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2020-10-26 19:27:34,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034542360] [2020-10-26 19:27:34,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:34,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:27:34,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640186808] [2020-10-26 19:27:34,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:27:34,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:34,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:27:34,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:34,844 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 30 states. [2020-10-26 19:27:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:35,184 INFO L93 Difference]: Finished difference Result 231 states and 242 transitions. [2020-10-26 19:27:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:27:35,185 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 125 [2020-10-26 19:27:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:35,186 INFO L225 Difference]: With dead ends: 231 [2020-10-26 19:27:35,186 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:27:35,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:27:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-10-26 19:27:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:27:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-26 19:27:35,195 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2020-10-26 19:27:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:35,195 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-26 19:27:35,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:27:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-26 19:27:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-26 19:27:35,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:35,197 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:35,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:27:35,197 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:35,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1047479720, now seen corresponding path program 27 times [2020-10-26 19:27:35,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:35,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113071463] [2020-10-26 19:27:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:35,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:35,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:35,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:40,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:40,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 19:27:40,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:40,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:27:40,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:27:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:27:40,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:40,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:40,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:40,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:40,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:40,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:40,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:40,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:40,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:40,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:40,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:40,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2020-10-26 19:27:40,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113071463] [2020-10-26 19:27:40,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:40,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:27:40,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042838990] [2020-10-26 19:27:40,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:27:40,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:27:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:27:40,914 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 31 states. [2020-10-26 19:27:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:41,406 INFO L93 Difference]: Finished difference Result 238 states and 249 transitions. [2020-10-26 19:27:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:27:41,407 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 129 [2020-10-26 19:27:41,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:41,408 INFO L225 Difference]: With dead ends: 238 [2020-10-26 19:27:41,408 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:27:41,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:27:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:27:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-26 19:27:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:27:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-26 19:27:41,418 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 129 [2020-10-26 19:27:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:41,418 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-26 19:27:41,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:27:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-26 19:27:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 19:27:41,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:41,420 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:41,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:27:41,420 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:41,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:41,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1550130518, now seen corresponding path program 28 times [2020-10-26 19:27:41,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:41,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844490412] [2020-10-26 19:27:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:41,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:41,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:41,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:46,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:46,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:27:46,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:46,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:27:46,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:27:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:27:46,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:47,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:47,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:47,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:47,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:47,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:47,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:47,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:47,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2020-10-26 19:27:47,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844490412] [2020-10-26 19:27:47,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:47,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:27:47,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855295345] [2020-10-26 19:27:47,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:27:47,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:47,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:27:47,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:27:47,266 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 32 states. [2020-10-26 19:27:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:47,684 INFO L93 Difference]: Finished difference Result 245 states and 256 transitions. [2020-10-26 19:27:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:27:47,685 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 133 [2020-10-26 19:27:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:47,686 INFO L225 Difference]: With dead ends: 245 [2020-10-26 19:27:47,686 INFO L226 Difference]: Without dead ends: 142 [2020-10-26 19:27:47,687 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 [2020-10-26 19:27:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-26 19:27:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-26 19:27:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:27:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-26 19:27:47,696 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 133 [2020-10-26 19:27:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:47,696 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-26 19:27:47,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:27:47,696 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-26 19:27:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-26 19:27:47,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:47,697 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:47,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:27:47,698 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:47,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:47,698 INFO L82 PathProgramCache]: Analyzing trace with hash 828965864, now seen corresponding path program 29 times [2020-10-26 19:27:47,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:47,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734997131] [2020-10-26 19:27:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:47,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:48,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:48,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:52,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:52,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 19:27:52,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:52,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:27:52,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:27:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:27:52,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:53,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:53,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:53,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:53,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:53,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:53,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:27:53,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:53,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:53,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:53,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:53,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2020-10-26 19:27:53,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734997131] [2020-10-26 19:27:53,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:53,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:27:53,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024099778] [2020-10-26 19:27:53,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:27:53,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:53,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:27:53,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:27:53,580 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 33 states. [2020-10-26 19:27:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:54,014 INFO L93 Difference]: Finished difference Result 252 states and 263 transitions. [2020-10-26 19:27:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:27:54,014 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 137 [2020-10-26 19:27:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:54,016 INFO L225 Difference]: With dead ends: 252 [2020-10-26 19:27:54,016 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:27:54,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:27:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:27:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-26 19:27:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-26 19:27:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2020-10-26 19:27:54,024 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 137 [2020-10-26 19:27:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:54,024 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2020-10-26 19:27:54,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:27:54,024 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2020-10-26 19:27:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-26 19:27:54,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:54,025 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:54,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:27:54,025 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash 176633834, now seen corresponding path program 30 times [2020-10-26 19:27:54,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:54,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910478351] [2020-10-26 19:27:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:54,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:54,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:54,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:59,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:59,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 19:27:59,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:27:59,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:27:59,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:59,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:27:59,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:59,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:27:59,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:59,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:59,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:59,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:59,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:59,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:59,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:59,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:59,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:59,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:59,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:59,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-10-26 19:27:59,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910478351] [2020-10-26 19:27:59,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:59,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:27:59,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12164240] [2020-10-26 19:27:59,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:27:59,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:59,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:27:59,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:27:59,856 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 34 states. [2020-10-26 19:28:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:00,400 INFO L93 Difference]: Finished difference Result 259 states and 270 transitions. [2020-10-26 19:28:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:28:00,400 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 141 [2020-10-26 19:28:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:00,402 INFO L225 Difference]: With dead ends: 259 [2020-10-26 19:28:00,402 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:28:00,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:28:00,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-26 19:28:00,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-26 19:28:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-10-26 19:28:00,416 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2020-10-26 19:28:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:00,417 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-10-26 19:28:00,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:28:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-10-26 19:28:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-26 19:28:00,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:00,418 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:00,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:28:00,420 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1205497304, now seen corresponding path program 31 times [2020-10-26 19:28:00,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:00,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53303513] [2020-10-26 19:28:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:00,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:00,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:01,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:05,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:05,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-26 19:28:05,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:05,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:28:05,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:28:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:28:05,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:06,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:06,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:06,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:06,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:06,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:06,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:06,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:06,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:06,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:06,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:06,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2020-10-26 19:28:06,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53303513] [2020-10-26 19:28:06,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:06,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:28:06,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624669782] [2020-10-26 19:28:06,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:28:06,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:28:06,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:06,399 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 35 states. [2020-10-26 19:28:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:06,970 INFO L93 Difference]: Finished difference Result 266 states and 277 transitions. [2020-10-26 19:28:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:28:06,971 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-10-26 19:28:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:06,973 INFO L225 Difference]: With dead ends: 266 [2020-10-26 19:28:06,973 INFO L226 Difference]: Without dead ends: 154 [2020-10-26 19:28:06,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:06,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-26 19:28:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-26 19:28:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-26 19:28:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-10-26 19:28:06,984 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 145 [2020-10-26 19:28:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:06,984 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-10-26 19:28:06,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:28:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-10-26 19:28:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-26 19:28:06,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:06,985 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:06,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:28:06,986 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:06,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:06,986 INFO L82 PathProgramCache]: Analyzing trace with hash 251985194, now seen corresponding path program 32 times [2020-10-26 19:28:06,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:06,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702462626] [2020-10-26 19:28:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:07,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:12,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:12,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 19:28:12,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:12,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:28:12,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:12,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:28:12,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:12,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:28:12,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:12,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:12,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:12,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:12,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:12,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:12,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:12,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:12,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:12,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:12,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2020-10-26 19:28:12,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702462626] [2020-10-26 19:28:12,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:12,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:28:12,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106093532] [2020-10-26 19:28:12,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:28:12,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:12,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:28:12,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:12,950 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 36 states. [2020-10-26 19:28:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:13,554 INFO L93 Difference]: Finished difference Result 273 states and 284 transitions. [2020-10-26 19:28:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:28:13,555 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 149 [2020-10-26 19:28:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:13,556 INFO L225 Difference]: With dead ends: 273 [2020-10-26 19:28:13,556 INFO L226 Difference]: Without dead ends: 158 [2020-10-26 19:28:13,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:13,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-26 19:28:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-26 19:28:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-26 19:28:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2020-10-26 19:28:13,565 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 149 [2020-10-26 19:28:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:13,566 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2020-10-26 19:28:13,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:28:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2020-10-26 19:28:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-26 19:28:13,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:13,567 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:13,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:28:13,567 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:13,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1909256296, now seen corresponding path program 33 times [2020-10-26 19:28:13,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:13,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129417783] [2020-10-26 19:28:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:13,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:13,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:14,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:18,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:18,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-26 19:28:18,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:18,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:28:18,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:18,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:28:18,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:18,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:28:18,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:19,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:19,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:19,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:19,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:19,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:19,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:19,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:19,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:19,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2020-10-26 19:28:19,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129417783] [2020-10-26 19:28:19,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:19,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:28:19,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880065259] [2020-10-26 19:28:19,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:28:19,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:19,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:28:19,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:19,581 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 37 states. [2020-10-26 19:28:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:20,056 INFO L93 Difference]: Finished difference Result 280 states and 291 transitions. [2020-10-26 19:28:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:28:20,061 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 153 [2020-10-26 19:28:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:20,063 INFO L225 Difference]: With dead ends: 280 [2020-10-26 19:28:20,063 INFO L226 Difference]: Without dead ends: 162 [2020-10-26 19:28:20,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:20,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-26 19:28:20,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-26 19:28:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-26 19:28:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-10-26 19:28:20,072 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 153 [2020-10-26 19:28:20,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:20,072 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-10-26 19:28:20,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:28:20,072 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-10-26 19:28:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 19:28:20,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:20,074 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:20,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:28:20,074 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1706282390, now seen corresponding path program 34 times [2020-10-26 19:28:20,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:20,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424056960] [2020-10-26 19:28:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:20,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:20,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:20,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:25,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:25,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 19:28:25,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:25,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:28:25,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:25,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:28:25,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:25,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:28:25,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:26,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:26,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:26,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:26,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:26,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:26,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:26,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:26,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:26,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:26,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:26,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2020-10-26 19:28:26,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424056960] [2020-10-26 19:28:26,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:26,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:28:26,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944986169] [2020-10-26 19:28:26,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:28:26,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:28:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:28:26,162 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 38 states. [2020-10-26 19:28:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:26,616 INFO L93 Difference]: Finished difference Result 287 states and 298 transitions. [2020-10-26 19:28:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:28:26,617 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 157 [2020-10-26 19:28:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:26,619 INFO L225 Difference]: With dead ends: 287 [2020-10-26 19:28:26,619 INFO L226 Difference]: Without dead ends: 166 [2020-10-26 19:28:26,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:28:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-26 19:28:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-26 19:28:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-26 19:28:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2020-10-26 19:28:26,628 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 157 [2020-10-26 19:28:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:26,629 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2020-10-26 19:28:26,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:28:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2020-10-26 19:28:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-26 19:28:26,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:26,630 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:26,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:28:26,630 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:26,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:26,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1820794536, now seen corresponding path program 35 times [2020-10-26 19:28:26,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:26,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510074462] [2020-10-26 19:28:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:26,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:26,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:27,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:31,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-26 19:28:31,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:31,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 19:28:31,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:28:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:28:31,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:32,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:32,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:32,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:32,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:32,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:32,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:32,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:32,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:32,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:32,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:32,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-26 19:28:32,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510074462] [2020-10-26 19:28:32,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:32,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:28:32,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151321586] [2020-10-26 19:28:32,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:28:32,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:32,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:28:32,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:28:32,766 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 39 states. [2020-10-26 19:28:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:33,216 INFO L93 Difference]: Finished difference Result 294 states and 305 transitions. [2020-10-26 19:28:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:28:33,217 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 161 [2020-10-26 19:28:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:33,218 INFO L225 Difference]: With dead ends: 294 [2020-10-26 19:28:33,219 INFO L226 Difference]: Without dead ends: 170 [2020-10-26 19:28:33,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:28:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-26 19:28:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-10-26 19:28:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-26 19:28:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2020-10-26 19:28:33,227 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2020-10-26 19:28:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:33,227 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2020-10-26 19:28:33,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:28:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2020-10-26 19:28:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-26 19:28:33,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:33,229 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:33,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:28:33,230 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash -158017622, now seen corresponding path program 36 times [2020-10-26 19:28:33,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:33,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234141693] [2020-10-26 19:28:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:33,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:33,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:33,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:38,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:38,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 19:28:38,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:38,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:28:38,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:28:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:28:38,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:39,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:39,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:39,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:39,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:39,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:39,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:39,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:39,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2020-10-26 19:28:39,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234141693] [2020-10-26 19:28:39,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:39,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:28:39,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054160999] [2020-10-26 19:28:39,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:28:39,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:39,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:28:39,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:28:39,401 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 40 states. [2020-10-26 19:28:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:40,054 INFO L93 Difference]: Finished difference Result 301 states and 312 transitions. [2020-10-26 19:28:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:28:40,055 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 165 [2020-10-26 19:28:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:40,057 INFO L225 Difference]: With dead ends: 301 [2020-10-26 19:28:40,057 INFO L226 Difference]: Without dead ends: 174 [2020-10-26 19:28:40,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:28:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-26 19:28:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-26 19:28:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-26 19:28:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2020-10-26 19:28:40,066 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 165 [2020-10-26 19:28:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:40,067 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2020-10-26 19:28:40,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:28:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2020-10-26 19:28:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-26 19:28:40,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:40,068 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:40,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:28:40,068 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1518592792, now seen corresponding path program 37 times [2020-10-26 19:28:40,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:40,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869056897] [2020-10-26 19:28:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:40,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:40,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:40,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:45,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:45,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-26 19:28:45,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:45,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:28:45,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:28:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:28:45,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:46,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:46,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:46,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:46,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:46,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:46,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:46,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:46,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 2109 trivial. 0 not checked. [2020-10-26 19:28:46,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869056897] [2020-10-26 19:28:46,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:46,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:28:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459084559] [2020-10-26 19:28:46,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:28:46,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:46,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:28:46,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:28:46,294 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 41 states. [2020-10-26 19:28:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:46,981 INFO L93 Difference]: Finished difference Result 308 states and 319 transitions. [2020-10-26 19:28:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:28:46,981 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 169 [2020-10-26 19:28:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:46,983 INFO L225 Difference]: With dead ends: 308 [2020-10-26 19:28:46,983 INFO L226 Difference]: Without dead ends: 178 [2020-10-26 19:28:46,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:28:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-26 19:28:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-26 19:28:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-26 19:28:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-10-26 19:28:46,993 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2020-10-26 19:28:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:46,993 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-10-26 19:28:46,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:28:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-10-26 19:28:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-26 19:28:46,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:46,994 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:46,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:28:46,995 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:46,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:46,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1326902506, now seen corresponding path program 38 times [2020-10-26 19:28:46,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:46,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068799818] [2020-10-26 19:28:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:47,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:47,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:47,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:52,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:52,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-26 19:28:52,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:28:52,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:28:52,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:52,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:28:52,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:52,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:28:52,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:53,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:53,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:53,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:53,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:53,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:53,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:53,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:53,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:53,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:53,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:53,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 2223 trivial. 0 not checked. [2020-10-26 19:28:53,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068799818] [2020-10-26 19:28:53,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:53,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:28:53,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136402344] [2020-10-26 19:28:53,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:28:53,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:53,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:28:53,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:28:53,309 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 42 states. [2020-10-26 19:28:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:53,840 INFO L93 Difference]: Finished difference Result 315 states and 326 transitions. [2020-10-26 19:28:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:28:53,840 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 173 [2020-10-26 19:28:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:53,842 INFO L225 Difference]: With dead ends: 315 [2020-10-26 19:28:53,842 INFO L226 Difference]: Without dead ends: 182 [2020-10-26 19:28:53,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:28:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-26 19:28:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-26 19:28:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-26 19:28:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-10-26 19:28:53,851 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 173 [2020-10-26 19:28:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:53,852 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-10-26 19:28:53,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:28:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-10-26 19:28:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-26 19:28:53,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:53,853 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:53,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:28:53,853 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:53,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1999377624, now seen corresponding path program 39 times [2020-10-26 19:28:53,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:53,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568354307] [2020-10-26 19:28:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:53,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:54,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:54,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking...