/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=DEEPEST --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/sorting_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:14:51,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:14:51,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:14:51,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:14:51,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:14:51,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:14:51,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:14:51,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:14:51,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:14:51,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:14:51,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:14:51,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:14:51,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:14:51,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:14:51,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:14:51,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:14:51,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:14:51,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:14:51,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:14:51,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:14:51,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:14:51,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:14:51,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:14:51,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:14:51,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:14:51,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:14:51,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:14:51,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:14:51,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:14:51,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:14:51,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:14:51,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:14:51,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:14:51,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:14:51,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:14:51,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:14:51,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:14:51,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:14:51,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:14:51,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:14:51,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:14:51,368 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 [2020-10-27 14:14:51,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:14:51,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:14:51,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:14:51,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:14:51,404 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:14:51,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:14:51,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:14:51,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:14:51,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:14:51,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:14:51,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:14:51,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:14:51,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:14:51,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:14:51,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:14:51,406 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:14:51,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:14:51,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:14:51,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:14:51,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:14:51,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:14:51,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:14:51,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:14:51,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:14:51,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:14:51,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:14:51,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:14:51,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:14:51,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:14:51,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:14:51,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:14:51,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:14:52,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:14:52,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:14:52,005 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:14:52,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2020-10-27 14:14:52,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c16346278/d45daa1b674547698c3ff9a40be2efc5/FLAG8e083d89e [2020-10-27 14:14:52,903 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:14:52,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2020-10-27 14:14:52,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c16346278/d45daa1b674547698c3ff9a40be2efc5/FLAG8e083d89e [2020-10-27 14:14:53,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c16346278/d45daa1b674547698c3ff9a40be2efc5 [2020-10-27 14:14:53,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:14:53,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:14:53,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:14:53,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:14:53,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:14:53,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:14:53" (1/1) ... [2020-10-27 14:14:53,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3066b18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53, skipping insertion in model container [2020-10-27 14:14:53,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:14:53" (1/1) ... [2020-10-27 14:14:53,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:14:53,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:14:53,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:14:53,483 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:14:53,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:14:53,542 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:14:53,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53 WrapperNode [2020-10-27 14:14:53,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:14:53,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:14:53,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:14:53,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:14:53,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53" (1/1) ... [2020-10-27 14:14:53,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53" (1/1) ... [2020-10-27 14:14:53,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53" (1/1) ... [2020-10-27 14:14:53,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53" (1/1) ... [2020-10-27 14:14:53,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53" (1/1) ... [2020-10-27 14:14:53,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53" (1/1) ... [2020-10-27 14:14:53,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53" (1/1) ... [2020-10-27 14:14:53,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:14:53,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:14:53,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:14:53,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:14:53,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53" (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 [2020-10-27 14:14:53,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:14:53,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:14:53,696 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:14:53,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:14:53,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:14:53,697 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:14:53,697 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:14:53,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:14:53,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:14:53,698 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:14:53,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:14:53,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:14:53,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:14:53,701 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:14:53,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:14:53,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:14:53,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:14:53,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:14:53,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:14:53,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:14:54,341 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:14:54,341 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 14:14:54,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:14:54 BoogieIcfgContainer [2020-10-27 14:14:54,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:14:54,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:14:54,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:14:54,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:14:54,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:14:53" (1/3) ... [2020-10-27 14:14:54,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3796da1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:14:54, skipping insertion in model container [2020-10-27 14:14:54,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:53" (2/3) ... [2020-10-27 14:14:54,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3796da1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:14:54, skipping insertion in model container [2020-10-27 14:14:54,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:14:54" (3/3) ... [2020-10-27 14:14:54,356 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2020-10-27 14:14:54,375 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:14:54,383 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:14:54,402 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:14:54,437 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:14:54,437 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:14:54,437 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:14:54,437 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:14:54,437 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:14:54,438 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:14:54,438 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:14:54,438 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:14:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 14:14:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:14:54,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:54,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:54,475 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1497277457, now seen corresponding path program 1 times [2020-10-27 14:14:54,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:54,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6850017] [2020-10-27 14:14:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:54,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:54,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:54,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:54,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:14:54,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:54,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-27 14:14:54,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:14:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:54,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:14:54,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:54,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:55,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:55,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:55,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 14:14:55,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:55,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:14:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:55,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6850017] [2020-10-27 14:14:55,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:14:55,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:14:55,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488318679] [2020-10-27 14:14:55,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:14:55,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:55,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:14:55,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:14:55,083 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-27 14:14:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:55,263 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2020-10-27 14:14:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:14:55,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-27 14:14:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:55,276 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:14:55,277 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 14:14:55,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:14:55,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 14:14:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 14:14:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 14:14:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-27 14:14:55,339 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-27 14:14:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:55,339 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-27 14:14:55,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:14:55,340 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-27 14:14:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:14:55,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:55,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:55,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:14:55,342 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:55,344 INFO L82 PathProgramCache]: Analyzing trace with hash 947624462, now seen corresponding path program 1 times [2020-10-27 14:14:55,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:55,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759487028] [2020-10-27 14:14:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:55,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:55,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:14:55,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:55,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-27 14:14:55,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:55,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:14:55,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:14:55,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:14:55,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:14:55,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:55,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:55,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:55,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:55,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:14:55,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:55,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:55,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:55,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759487028] [2020-10-27 14:14:55,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:14:55,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:14:55,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433251890] [2020-10-27 14:14:55,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:14:55,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:55,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:14:55,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:14:55,804 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-10-27 14:14:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:55,933 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-27 14:14:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:14:55,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 14:14:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:55,935 INFO L225 Difference]: With dead ends: 47 [2020-10-27 14:14:55,936 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:14:55,937 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 [2020-10-27 14:14:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:14:55,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 14:14:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:14:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-27 14:14:55,949 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 18 [2020-10-27 14:14:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:55,949 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-27 14:14:55,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:14:55,950 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-27 14:14:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 14:14:55,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:55,951 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] [2020-10-27 14:14:55,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:14:55,952 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:55,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1145765099, now seen corresponding path program 1 times [2020-10-27 14:14:55,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:55,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993020186] [2020-10-27 14:14:55,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:55,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:56,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 14:14:56,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:56,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 14:14:56,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:14:56,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:14:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:14:56,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:14:56,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:56,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:56,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:56,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:56,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:14:56,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:56,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:56,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:56,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:56,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:14:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:56,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993020186] [2020-10-27 14:14:56,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:14:56,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:14:56,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180296537] [2020-10-27 14:14:56,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:14:56,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:56,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:14:56,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:14:56,177 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 4 states. [2020-10-27 14:14:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:56,304 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2020-10-27 14:14:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:14:56,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 14:14:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:56,306 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:14:56,306 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:14:56,307 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 [2020-10-27 14:14:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:14:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 14:14:56,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:14:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-27 14:14:56,316 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2020-10-27 14:14:56,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:56,317 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-27 14:14:56,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:14:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-27 14:14:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:14:56,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:56,318 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] [2020-10-27 14:14:56,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:14:56,319 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:56,320 INFO L82 PathProgramCache]: Analyzing trace with hash -465445480, now seen corresponding path program 1 times [2020-10-27 14:14:56,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:56,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269397830] [2020-10-27 14:14:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:56,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:56,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:14:56,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:56,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 14:14:56,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:56,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:14:56,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:14:56,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:14:56,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:56,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:56,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:56,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:56,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:56,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:14:56,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:56,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:56,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:56,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:56,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:56,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269397830] [2020-10-27 14:14:56,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:56,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:14:56,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723490841] [2020-10-27 14:14:56,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:14:56,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:56,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:14:56,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:14:56,623 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 5 states. [2020-10-27 14:14:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:56,734 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2020-10-27 14:14:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:14:56,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 14:14:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:56,736 INFO L225 Difference]: With dead ends: 66 [2020-10-27 14:14:56,736 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:14:56,737 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 [2020-10-27 14:14:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:14:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-27 14:14:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:14:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-27 14:14:56,746 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 23 [2020-10-27 14:14:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:56,747 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-27 14:14:56,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:14:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-27 14:14:56,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 14:14:56,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:56,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:56,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:14:56,749 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:56,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1014345675, now seen corresponding path program 2 times [2020-10-27 14:14:56,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:56,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235090999] [2020-10-27 14:14:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:56,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:57,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:14:57,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-27 14:14:57,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:14:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:14:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:14:57,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:57,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:57,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:57,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:57,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:57,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 14:14:57,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:57,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:57,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:57,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:57,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:57,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235090999] [2020-10-27 14:14:57,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:57,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:14:57,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865385262] [2020-10-27 14:14:57,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:14:57,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:57,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:14:57,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:14:57,172 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2020-10-27 14:14:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:57,323 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2020-10-27 14:14:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:14:57,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-27 14:14:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:57,325 INFO L225 Difference]: With dead ends: 77 [2020-10-27 14:14:57,325 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:14:57,326 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 [2020-10-27 14:14:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:14:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-27 14:14:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 14:14:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-10-27 14:14:57,336 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 26 [2020-10-27 14:14:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:57,336 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-10-27 14:14:57,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:14:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-10-27 14:14:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:14:57,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:57,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:57,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:14:57,338 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:57,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:57,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1935408248, now seen corresponding path program 3 times [2020-10-27 14:14:57,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:57,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471997979] [2020-10-27 14:14:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:57,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:57,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:14:57,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:57,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-27 14:14:57,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:57,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:14:57,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:14:57,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:14:57,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:57,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:57,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:57,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:57,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:57,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:14:57,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:57,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:57,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:57,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:57,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:57,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471997979] [2020-10-27 14:14:57,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:57,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:14:57,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515136693] [2020-10-27 14:14:57,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:14:57,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:57,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:14:57,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:14:57,820 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 7 states. [2020-10-27 14:14:57,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:57,981 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2020-10-27 14:14:57,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:14:57,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-27 14:14:57,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:57,983 INFO L225 Difference]: With dead ends: 89 [2020-10-27 14:14:57,983 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 14:14:57,984 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 [2020-10-27 14:14:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 14:14:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-27 14:14:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 14:14:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-10-27 14:14:57,993 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 29 [2020-10-27 14:14:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:57,993 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-10-27 14:14:57,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:14:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-10-27 14:14:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 14:14:57,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:57,995 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:57,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:14:57,996 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:57,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:57,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1271315115, now seen corresponding path program 4 times [2020-10-27 14:14:57,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:57,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643913904] [2020-10-27 14:14:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:58,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:58,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:14:58,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:58,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-27 14:14:58,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:58,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:14:58,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:14:58,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:14:58,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:58,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:58,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:58,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:58,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:58,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:14:58,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:58,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:58,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643913904] [2020-10-27 14:14:58,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:58,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:14:58,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272872864] [2020-10-27 14:14:58,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:14:58,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:58,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:14:58,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:14:58,565 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 8 states. [2020-10-27 14:14:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:58,712 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-10-27 14:14:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:14:58,712 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-27 14:14:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:58,713 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:14:58,714 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:14:58,715 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 [2020-10-27 14:14:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:14:58,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-27 14:14:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:14:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-27 14:14:58,725 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 32 [2020-10-27 14:14:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:58,725 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-27 14:14:58,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:14:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-27 14:14:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:14:58,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:58,727 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:58,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:14:58,727 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:58,728 INFO L82 PathProgramCache]: Analyzing trace with hash 190542680, now seen corresponding path program 5 times [2020-10-27 14:14:58,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:58,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469404001] [2020-10-27 14:14:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:58,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:59,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:59,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:14:59,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:59,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-27 14:14:59,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:59,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:14:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:14:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:14:59,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:59,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:59,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:59,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:59,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:59,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:59,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:14:59,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:59,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:59,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:59,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:59,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:59,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469404001] [2020-10-27 14:14:59,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:59,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:14:59,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793134982] [2020-10-27 14:14:59,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:14:59,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:59,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:14:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:14:59,255 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 9 states. [2020-10-27 14:14:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:59,448 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2020-10-27 14:14:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:14:59,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-27 14:14:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:59,451 INFO L225 Difference]: With dead ends: 113 [2020-10-27 14:14:59,451 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:14:59,452 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 [2020-10-27 14:14:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:14:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-27 14:14:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 14:14:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2020-10-27 14:14:59,461 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 35 [2020-10-27 14:14:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:59,462 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2020-10-27 14:14:59,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:14:59,462 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2020-10-27 14:14:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:14:59,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:59,464 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:59,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:14:59,464 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash -572267915, now seen corresponding path program 6 times [2020-10-27 14:14:59,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:59,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780361213] [2020-10-27 14:14:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:59,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:00,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:15:00,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:00,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-27 14:15:00,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:15:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:00,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:15:00,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:00,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:00,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:00,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:00,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:00,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:00,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:00,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:00,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780361213] [2020-10-27 14:15:00,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:00,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:15:00,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178559337] [2020-10-27 14:15:00,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:15:00,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:15:00,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:15:00,273 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand 10 states. [2020-10-27 14:15:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:00,534 INFO L93 Difference]: Finished difference Result 125 states and 162 transitions. [2020-10-27 14:15:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:15:00,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-27 14:15:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:00,538 INFO L225 Difference]: With dead ends: 125 [2020-10-27 14:15:00,539 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:15:00,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:15:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:15:00,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-10-27 14:15:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:15:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2020-10-27 14:15:00,564 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 38 [2020-10-27 14:15:00,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:00,568 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2020-10-27 14:15:00,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:15:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2020-10-27 14:15:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:15:00,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:00,570 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:00,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:15:00,571 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:00,577 INFO L82 PathProgramCache]: Analyzing trace with hash -790740424, now seen corresponding path program 7 times [2020-10-27 14:15:00,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:00,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162565914] [2020-10-27 14:15:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:00,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:01,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:15:01,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:01,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-27 14:15:01,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:15:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:15:01,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:01,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:01,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:01,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:01,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:01,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:01,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:01,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:01,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:01,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:01,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:01,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162565914] [2020-10-27 14:15:01,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:01,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:15:01,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199349318] [2020-10-27 14:15:01,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:15:01,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:15:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:15:01,267 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 11 states. [2020-10-27 14:15:01,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:01,428 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2020-10-27 14:15:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:15:01,429 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 14:15:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:01,430 INFO L225 Difference]: With dead ends: 137 [2020-10-27 14:15:01,430 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 14:15:01,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:15:01,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 14:15:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-10-27 14:15:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:15:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-10-27 14:15:01,446 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 41 [2020-10-27 14:15:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:01,446 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-10-27 14:15:01,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:15:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-10-27 14:15:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 14:15:01,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:01,451 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:01,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:15:01,452 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:01,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:01,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1865164693, now seen corresponding path program 8 times [2020-10-27 14:15:01,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:01,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987878266] [2020-10-27 14:15:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:15:02,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:02,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-27 14:15:02,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:15:02,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:02,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:15:02,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:02,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:02,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:02,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:15:02,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:02,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:02,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:02,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:02,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987878266] [2020-10-27 14:15:02,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:02,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:15:02,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65689334] [2020-10-27 14:15:02,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:15:02,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:02,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:15:02,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:15:02,295 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 12 states. [2020-10-27 14:15:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:02,472 INFO L93 Difference]: Finished difference Result 149 states and 194 transitions. [2020-10-27 14:15:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:15:02,472 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-27 14:15:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:02,473 INFO L225 Difference]: With dead ends: 149 [2020-10-27 14:15:02,474 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:15:02,474 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 [2020-10-27 14:15:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:15:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-10-27 14:15:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:15:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2020-10-27 14:15:02,491 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 44 [2020-10-27 14:15:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:02,492 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2020-10-27 14:15:02,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:15:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2020-10-27 14:15:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:15:02,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:02,493 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:02,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:15:02,494 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:02,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2046978328, now seen corresponding path program 9 times [2020-10-27 14:15:02,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:02,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412317023] [2020-10-27 14:15:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:03,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:15:03,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:03,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-27 14:15:03,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:03,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:15:03,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:03,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:15:03,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:03,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:03,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:03,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:03,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:03,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:03,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:03,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:03,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:03,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:03,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:03,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412317023] [2020-10-27 14:15:03,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:03,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:15:03,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079063095] [2020-10-27 14:15:03,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:15:03,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:03,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:15:03,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:15:03,487 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand 13 states. [2020-10-27 14:15:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:03,687 INFO L93 Difference]: Finished difference Result 161 states and 210 transitions. [2020-10-27 14:15:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:15:03,688 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-27 14:15:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:03,689 INFO L225 Difference]: With dead ends: 161 [2020-10-27 14:15:03,689 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:15:03,693 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 [2020-10-27 14:15:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:15:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-10-27 14:15:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 14:15:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2020-10-27 14:15:03,707 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 47 [2020-10-27 14:15:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:03,707 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2020-10-27 14:15:03,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:15:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2020-10-27 14:15:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:15:03,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:03,709 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:03,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:15:03,711 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:03,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1791748939, now seen corresponding path program 10 times [2020-10-27 14:15:03,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:03,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479922265] [2020-10-27 14:15:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:03,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:04,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:04,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 14:15:04,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:04,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-27 14:15:04,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:04,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:15:04,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:04,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:15:04,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:04,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:04,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:04,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:04,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:04,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:04,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:15:04,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:04,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:04,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:15:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:04,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479922265] [2020-10-27 14:15:04,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:04,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:15:04,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104261973] [2020-10-27 14:15:04,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:15:04,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:04,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:15:04,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:15:04,803 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand 14 states. [2020-10-27 14:15:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:04,966 INFO L93 Difference]: Finished difference Result 173 states and 226 transitions. [2020-10-27 14:15:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:15:04,966 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-27 14:15:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:04,967 INFO L225 Difference]: With dead ends: 173 [2020-10-27 14:15:04,968 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:15:04,969 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 [2020-10-27 14:15:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:15:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-10-27 14:15:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:15:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2020-10-27 14:15:04,982 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 50 [2020-10-27 14:15:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:04,982 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2020-10-27 14:15:04,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:15:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2020-10-27 14:15:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:15:04,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:04,984 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:04,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:15:04,985 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:04,985 INFO L82 PathProgramCache]: Analyzing trace with hash 778430456, now seen corresponding path program 11 times [2020-10-27 14:15:04,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:04,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456640360] [2020-10-27 14:15:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:05,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:06,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:06,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:15:06,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:06,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-27 14:15:06,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:06,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:15:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:15:06,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:06,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:06,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:06,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:06,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:06,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:06,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:06,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:06,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:06,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:06,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:06,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456640360] [2020-10-27 14:15:06,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:06,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:15:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047293300] [2020-10-27 14:15:06,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:15:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:06,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:15:06,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:15:06,236 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand 15 states. [2020-10-27 14:15:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:06,441 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2020-10-27 14:15:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:15:06,441 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-27 14:15:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:06,442 INFO L225 Difference]: With dead ends: 185 [2020-10-27 14:15:06,442 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:15:06,444 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 [2020-10-27 14:15:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:15:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-10-27 14:15:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 14:15:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2020-10-27 14:15:06,452 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 53 [2020-10-27 14:15:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:06,452 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2020-10-27 14:15:06,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:15:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2020-10-27 14:15:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 14:15:06,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:06,454 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:06,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:15:06,454 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1684166187, now seen corresponding path program 12 times [2020-10-27 14:15:06,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:06,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830136219] [2020-10-27 14:15:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:06,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:06,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:07,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:07,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:15:07,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:07,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1149 [2020-10-27 14:15:07,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:07,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:15:07,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:07,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:15:07,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:07,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:07,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:07,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:07,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:07,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:07,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:07,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:07,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:07,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:07,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:07,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:07,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830136219] [2020-10-27 14:15:07,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:07,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:15:07,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660269929] [2020-10-27 14:15:07,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:15:07,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:07,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:15:07,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:15:07,851 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand 16 states. [2020-10-27 14:15:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:08,057 INFO L93 Difference]: Finished difference Result 197 states and 258 transitions. [2020-10-27 14:15:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:15:08,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-10-27 14:15:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:08,059 INFO L225 Difference]: With dead ends: 197 [2020-10-27 14:15:08,059 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 14:15:08,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:15:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 14:15:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2020-10-27 14:15:08,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 14:15:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 134 transitions. [2020-10-27 14:15:08,070 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 134 transitions. Word has length 56 [2020-10-27 14:15:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:08,071 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 134 transitions. [2020-10-27 14:15:08,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:15:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 134 transitions. [2020-10-27 14:15:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:15:08,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:08,072 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:08,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:15:08,072 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1730592472, now seen corresponding path program 13 times [2020-10-27 14:15:08,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:08,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510429678] [2020-10-27 14:15:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:08,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:08,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:09,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:09,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:15:09,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:09,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-27 14:15:09,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:09,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:15:09,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:09,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:15:09,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:09,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:09,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:09,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:09,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:09,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:09,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:09,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:09,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:09,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:09,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:09,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:09,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510429678] [2020-10-27 14:15:09,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:09,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:15:09,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768695027] [2020-10-27 14:15:09,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:15:09,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:09,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:15:09,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:15:09,587 INFO L87 Difference]: Start difference. First operand 104 states and 134 transitions. Second operand 17 states. [2020-10-27 14:15:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:09,837 INFO L93 Difference]: Finished difference Result 209 states and 274 transitions. [2020-10-27 14:15:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:15:09,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-27 14:15:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:09,841 INFO L225 Difference]: With dead ends: 209 [2020-10-27 14:15:09,841 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 14:15:09,842 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 [2020-10-27 14:15:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 14:15:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2020-10-27 14:15:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 14:15:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2020-10-27 14:15:09,854 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 59 [2020-10-27 14:15:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:09,854 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2020-10-27 14:15:09,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:15:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2020-10-27 14:15:09,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 14:15:09,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:09,855 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:09,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:15:09,856 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:09,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash 210429685, now seen corresponding path program 14 times [2020-10-27 14:15:09,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:09,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94210206] [2020-10-27 14:15:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:09,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:11,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:11,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:15:11,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:11,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1441 [2020-10-27 14:15:11,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:11,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:15:11,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:11,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:15:11,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:11,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:11,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:11,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:11,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:11,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:11,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:11,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:11,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:11,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:11,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:11,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:11,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94210206] [2020-10-27 14:15:11,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:11,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:15:11,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682837440] [2020-10-27 14:15:11,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:15:11,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:15:11,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:15:11,580 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 18 states. [2020-10-27 14:15:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:11,822 INFO L93 Difference]: Finished difference Result 221 states and 290 transitions. [2020-10-27 14:15:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:15:11,822 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-10-27 14:15:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:11,824 INFO L225 Difference]: With dead ends: 221 [2020-10-27 14:15:11,824 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 14:15:11,825 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 [2020-10-27 14:15:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 14:15:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-10-27 14:15:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 14:15:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2020-10-27 14:15:11,831 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 62 [2020-10-27 14:15:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:11,831 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2020-10-27 14:15:11,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:15:11,832 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2020-10-27 14:15:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:15:11,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:11,832 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:11,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:15:11,833 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:11,834 INFO L82 PathProgramCache]: Analyzing trace with hash -823988808, now seen corresponding path program 15 times [2020-10-27 14:15:11,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:11,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260514779] [2020-10-27 14:15:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:11,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:13,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:15:13,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:13,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1685 [2020-10-27 14:15:13,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:13,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:15:13,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:13,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:15:13,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:13,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:13,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:13,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:13,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:13,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:13,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:13,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260514779] [2020-10-27 14:15:13,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:13,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:15:13,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134550587] [2020-10-27 14:15:13,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:15:13,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:15:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:15:13,788 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand 19 states. [2020-10-27 14:15:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:14,017 INFO L93 Difference]: Finished difference Result 233 states and 306 transitions. [2020-10-27 14:15:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:15:14,018 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-10-27 14:15:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:14,019 INFO L225 Difference]: With dead ends: 233 [2020-10-27 14:15:14,019 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:15:14,020 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 [2020-10-27 14:15:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:15:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2020-10-27 14:15:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 14:15:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2020-10-27 14:15:14,026 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 65 [2020-10-27 14:15:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:14,027 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2020-10-27 14:15:14,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:15:14,027 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2020-10-27 14:15:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:15:14,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:14,028 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:14,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:15:14,028 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash -794964971, now seen corresponding path program 16 times [2020-10-27 14:15:14,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:14,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663790122] [2020-10-27 14:15:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:14,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:14,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:15,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:15,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 14:15:15,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:15,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1747 [2020-10-27 14:15:15,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:15,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:15:15,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:15,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:15:15,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:16,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:16,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:16,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:16,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:16,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:15:16,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:16,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:16,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:16,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:16,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:16,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663790122] [2020-10-27 14:15:16,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:16,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:15:16,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392816115] [2020-10-27 14:15:16,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:15:16,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:16,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:15:16,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:15:16,164 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand 20 states. [2020-10-27 14:15:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:16,449 INFO L93 Difference]: Finished difference Result 245 states and 322 transitions. [2020-10-27 14:15:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:15:16,450 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-10-27 14:15:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:16,451 INFO L225 Difference]: With dead ends: 245 [2020-10-27 14:15:16,452 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 14:15:16,453 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 [2020-10-27 14:15:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 14:15:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-10-27 14:15:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:15:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 166 transitions. [2020-10-27 14:15:16,466 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 166 transitions. Word has length 68 [2020-10-27 14:15:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:16,467 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 166 transitions. [2020-10-27 14:15:16,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:15:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 166 transitions. [2020-10-27 14:15:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:15:16,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:16,469 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:16,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:15:16,469 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:16,470 INFO L82 PathProgramCache]: Analyzing trace with hash 565736600, now seen corresponding path program 17 times [2020-10-27 14:15:16,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:16,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644746445] [2020-10-27 14:15:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:16,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:18,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:15:18,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:18,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2046 [2020-10-27 14:15:18,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:18,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:15:18,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:18,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:15:18,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:18,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:18,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:18,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:18,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:18,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:18,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:18,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644746445] [2020-10-27 14:15:18,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:18,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:15:18,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089111906] [2020-10-27 14:15:18,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:15:18,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:15:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:15:18,952 INFO L87 Difference]: Start difference. First operand 128 states and 166 transitions. Second operand 21 states. [2020-10-27 14:15:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:19,297 INFO L93 Difference]: Finished difference Result 257 states and 338 transitions. [2020-10-27 14:15:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:15:19,298 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2020-10-27 14:15:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:19,299 INFO L225 Difference]: With dead ends: 257 [2020-10-27 14:15:19,299 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 14:15:19,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:15:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 14:15:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2020-10-27 14:15:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 14:15:19,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2020-10-27 14:15:19,306 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 71 [2020-10-27 14:15:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:19,307 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2020-10-27 14:15:19,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:15:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2020-10-27 14:15:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 14:15:19,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:19,308 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:19,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:15:19,308 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:19,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1324898613, now seen corresponding path program 18 times [2020-10-27 14:15:19,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:19,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909378381] [2020-10-27 14:15:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:19,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:19,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:21,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:21,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 14:15:21,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:21,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1765 [2020-10-27 14:15:21,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:21,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:15:21,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:21,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:15:21,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:21,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:21,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:21,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:21,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:21,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:21,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:21,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:21,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:21,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:21,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:21,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:21,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909378381] [2020-10-27 14:15:21,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:21,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:15:21,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487833563] [2020-10-27 14:15:21,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:15:21,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:21,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:15:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:15:21,450 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand 22 states. [2020-10-27 14:15:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:21,759 INFO L93 Difference]: Finished difference Result 269 states and 354 transitions. [2020-10-27 14:15:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:15:21,760 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 74 [2020-10-27 14:15:21,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:21,762 INFO L225 Difference]: With dead ends: 269 [2020-10-27 14:15:21,762 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 14:15:21,763 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 [2020-10-27 14:15:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 14:15:21,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2020-10-27 14:15:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 14:15:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 182 transitions. [2020-10-27 14:15:21,769 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 182 transitions. Word has length 74 [2020-10-27 14:15:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:21,769 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 182 transitions. [2020-10-27 14:15:21,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:15:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 182 transitions. [2020-10-27 14:15:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:15:21,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:21,770 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:21,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:15:21,770 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash 222647160, now seen corresponding path program 19 times [2020-10-27 14:15:21,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:21,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743613501] [2020-10-27 14:15:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:21,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:21,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:23,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:15:23,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:23,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1792 [2020-10-27 14:15:23,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:23,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:15:23,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:23,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:15:23,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:23,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:23,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:23,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:23,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:23,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:23,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:23,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:23,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743613501] [2020-10-27 14:15:23,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:23,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:15:23,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185612308] [2020-10-27 14:15:23,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:15:23,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:15:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:15:23,980 INFO L87 Difference]: Start difference. First operand 140 states and 182 transitions. Second operand 23 states. [2020-10-27 14:15:24,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:24,275 INFO L93 Difference]: Finished difference Result 281 states and 370 transitions. [2020-10-27 14:15:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:15:24,279 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2020-10-27 14:15:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:24,280 INFO L225 Difference]: With dead ends: 281 [2020-10-27 14:15:24,281 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 14:15:24,282 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 [2020-10-27 14:15:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 14:15:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2020-10-27 14:15:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 14:15:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 190 transitions. [2020-10-27 14:15:24,293 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 190 transitions. Word has length 77 [2020-10-27 14:15:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:24,293 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 190 transitions. [2020-10-27 14:15:24,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:15:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 190 transitions. [2020-10-27 14:15:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 14:15:24,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:24,294 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:24,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:15:24,294 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:24,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1925411243, now seen corresponding path program 20 times [2020-10-27 14:15:24,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:24,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990906147] [2020-10-27 14:15:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:24,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:24,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:26,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:26,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 14:15:26,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:26,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-27 14:15:26,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:26,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:15:26,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:26,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:15:26,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:26,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:26,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:26,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:26,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:26,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:15:26,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:26,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:26,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:26,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:26,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:26,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990906147] [2020-10-27 14:15:26,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:26,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:15:26,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686950966] [2020-10-27 14:15:26,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:15:26,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:26,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:15:26,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:15:26,659 INFO L87 Difference]: Start difference. First operand 146 states and 190 transitions. Second operand 24 states. [2020-10-27 14:15:26,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:26,947 INFO L93 Difference]: Finished difference Result 293 states and 386 transitions. [2020-10-27 14:15:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:15:26,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 80 [2020-10-27 14:15:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:26,949 INFO L225 Difference]: With dead ends: 293 [2020-10-27 14:15:26,949 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:15:26,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:15:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:15:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2020-10-27 14:15:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 14:15:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2020-10-27 14:15:26,957 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 80 [2020-10-27 14:15:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:26,957 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2020-10-27 14:15:26,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:15:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2020-10-27 14:15:26,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:15:26,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:26,961 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:26,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:15:26,961 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 279415384, now seen corresponding path program 21 times [2020-10-27 14:15:26,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:26,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822162387] [2020-10-27 14:15:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:26,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:26,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:29,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:29,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:15:29,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2129 [2020-10-27 14:15:29,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:15:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 14:15:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:29,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:29,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:29,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:29,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:29,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:29,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:29,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:29,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:29,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:29,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:29,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 1 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:29,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822162387] [2020-10-27 14:15:29,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:29,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:15:29,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634324011] [2020-10-27 14:15:29,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:15:29,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:15:29,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:15:29,594 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand 25 states. [2020-10-27 14:15:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:29,894 INFO L93 Difference]: Finished difference Result 305 states and 402 transitions. [2020-10-27 14:15:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:15:29,896 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 83 [2020-10-27 14:15:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:29,897 INFO L225 Difference]: With dead ends: 305 [2020-10-27 14:15:29,897 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 14:15:29,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:15:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 14:15:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2020-10-27 14:15:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 14:15:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 206 transitions. [2020-10-27 14:15:29,905 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 206 transitions. Word has length 83 [2020-10-27 14:15:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:29,906 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 206 transitions. [2020-10-27 14:15:29,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:15:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 206 transitions. [2020-10-27 14:15:29,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 14:15:29,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:29,907 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:29,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:15:29,907 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1334602613, now seen corresponding path program 22 times [2020-10-27 14:15:29,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:29,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244569291] [2020-10-27 14:15:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:29,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:32,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:32,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 14:15:32,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:32,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2267 [2020-10-27 14:15:32,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:32,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:15:32,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:32,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:15:32,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:32,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:32,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:32,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:32,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:32,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:32,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:32,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:32,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:32,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:32,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:32,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:32,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244569291] [2020-10-27 14:15:32,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:32,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:15:32,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287852095] [2020-10-27 14:15:32,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:15:32,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:32,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:15:32,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:15:32,675 INFO L87 Difference]: Start difference. First operand 158 states and 206 transitions. Second operand 26 states. [2020-10-27 14:15:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:32,932 INFO L93 Difference]: Finished difference Result 317 states and 418 transitions. [2020-10-27 14:15:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:15:32,933 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 86 [2020-10-27 14:15:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:32,934 INFO L225 Difference]: With dead ends: 317 [2020-10-27 14:15:32,935 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 14:15:32,936 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 [2020-10-27 14:15:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 14:15:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2020-10-27 14:15:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 14:15:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 214 transitions. [2020-10-27 14:15:32,957 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 214 transitions. Word has length 86 [2020-10-27 14:15:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:32,958 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 214 transitions. [2020-10-27 14:15:32,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:15:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 214 transitions. [2020-10-27 14:15:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:15:32,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:32,959 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:32,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:15:32,959 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:32,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1551702328, now seen corresponding path program 23 times [2020-10-27 14:15:32,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:32,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883481419] [2020-10-27 14:15:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:32,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:32,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:35,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:15:35,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:35,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2609 [2020-10-27 14:15:35,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:35,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:15:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 14:15:35,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:36,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:36,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:36,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:36,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:36,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:36,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:36,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:36,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:36,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:36,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:36,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 1 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:36,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883481419] [2020-10-27 14:15:36,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:36,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:15:36,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163723718] [2020-10-27 14:15:36,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:15:36,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:36,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:15:36,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:15:36,145 INFO L87 Difference]: Start difference. First operand 164 states and 214 transitions. Second operand 27 states. [2020-10-27 14:15:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:36,512 INFO L93 Difference]: Finished difference Result 329 states and 434 transitions. [2020-10-27 14:15:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:15:36,513 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 89 [2020-10-27 14:15:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:36,514 INFO L225 Difference]: With dead ends: 329 [2020-10-27 14:15:36,514 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 14:15:36,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:15:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 14:15:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2020-10-27 14:15:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-27 14:15:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 222 transitions. [2020-10-27 14:15:36,523 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 222 transitions. Word has length 89 [2020-10-27 14:15:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:36,523 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 222 transitions. [2020-10-27 14:15:36,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:15:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 222 transitions. [2020-10-27 14:15:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 14:15:36,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:36,525 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:36,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:15:36,525 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:36,528 INFO L82 PathProgramCache]: Analyzing trace with hash 948564117, now seen corresponding path program 24 times [2020-10-27 14:15:36,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:36,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255312910] [2020-10-27 14:15:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:36,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:36,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:39,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:39,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 14:15:39,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:39,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2922 [2020-10-27 14:15:39,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:39,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:15:39,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:39,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:15:39,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:39,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:39,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:39,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:39,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:39,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:39,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:39,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:39,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:39,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:39,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:39,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 1 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:39,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255312910] [2020-10-27 14:15:39,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:39,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:15:39,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942162109] [2020-10-27 14:15:39,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:15:39,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:39,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:15:39,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:15:39,973 INFO L87 Difference]: Start difference. First operand 170 states and 222 transitions. Second operand 28 states. [2020-10-27 14:15:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:40,321 INFO L93 Difference]: Finished difference Result 341 states and 450 transitions. [2020-10-27 14:15:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:15:40,322 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2020-10-27 14:15:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:40,324 INFO L225 Difference]: With dead ends: 341 [2020-10-27 14:15:40,324 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 14:15:40,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:15:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 14:15:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2020-10-27 14:15:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 14:15:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 230 transitions. [2020-10-27 14:15:40,334 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 230 transitions. Word has length 92 [2020-10-27 14:15:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:40,334 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 230 transitions. [2020-10-27 14:15:40,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:15:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 230 transitions. [2020-10-27 14:15:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:15:40,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:40,336 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:40,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:15:40,336 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:40,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1293680616, now seen corresponding path program 25 times [2020-10-27 14:15:40,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:40,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105179237] [2020-10-27 14:15:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:40,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:43,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:43,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:15:43,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:43,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3114 [2020-10-27 14:15:43,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:15:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 14:15:43,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:44,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:44,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:44,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:44,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:44,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:44,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:44,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:44,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:44,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:44,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:44,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 1 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:44,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105179237] [2020-10-27 14:15:44,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:44,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:15:44,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370706322] [2020-10-27 14:15:44,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:15:44,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:15:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:15:44,082 INFO L87 Difference]: Start difference. First operand 176 states and 230 transitions. Second operand 29 states. [2020-10-27 14:15:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:44,452 INFO L93 Difference]: Finished difference Result 353 states and 466 transitions. [2020-10-27 14:15:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:15:44,453 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2020-10-27 14:15:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:44,454 INFO L225 Difference]: With dead ends: 353 [2020-10-27 14:15:44,454 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 14:15:44,455 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 [2020-10-27 14:15:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 14:15:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2020-10-27 14:15:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 14:15:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 238 transitions. [2020-10-27 14:15:44,463 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 238 transitions. Word has length 95 [2020-10-27 14:15:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:44,464 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 238 transitions. [2020-10-27 14:15:44,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:15:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 238 transitions. [2020-10-27 14:15:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 14:15:44,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:44,465 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:44,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:15:44,465 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash -380166731, now seen corresponding path program 26 times [2020-10-27 14:15:44,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:44,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036884826] [2020-10-27 14:15:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:44,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:44,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:48,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:48,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 14:15:48,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:48,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3567 [2020-10-27 14:15:48,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:48,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:15:48,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:15:48,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:48,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:48,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:48,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:48,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:48,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:48,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:48,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:48,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:48,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 1 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:48,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036884826] [2020-10-27 14:15:48,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:48,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:15:48,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976926593] [2020-10-27 14:15:48,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:15:48,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:48,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:15:48,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:15:48,691 INFO L87 Difference]: Start difference. First operand 182 states and 238 transitions. Second operand 30 states. [2020-10-27 14:15:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:49,002 INFO L93 Difference]: Finished difference Result 365 states and 482 transitions. [2020-10-27 14:15:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:15:49,007 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 98 [2020-10-27 14:15:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:49,009 INFO L225 Difference]: With dead ends: 365 [2020-10-27 14:15:49,009 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 14:15:49,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:15:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 14:15:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2020-10-27 14:15:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-27 14:15:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 246 transitions. [2020-10-27 14:15:49,026 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 246 transitions. Word has length 98 [2020-10-27 14:15:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:49,026 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 246 transitions. [2020-10-27 14:15:49,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:15:49,026 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 246 transitions. [2020-10-27 14:15:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:15:49,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:49,028 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:49,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:15:49,028 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:49,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1199193848, now seen corresponding path program 27 times [2020-10-27 14:15:49,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:49,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293802936] [2020-10-27 14:15:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:49,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:49,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:53,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:53,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:15:53,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:53,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4001 [2020-10-27 14:15:53,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:15:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 14:15:53,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:53,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:53,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:53,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:53,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:53,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:53,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:53,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:53,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:53,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 1 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:53,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293802936] [2020-10-27 14:15:53,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:53,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:15:53,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311573159] [2020-10-27 14:15:53,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:15:53,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:53,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:15:53,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:15:53,740 INFO L87 Difference]: Start difference. First operand 188 states and 246 transitions. Second operand 31 states. [2020-10-27 14:15:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:54,170 INFO L93 Difference]: Finished difference Result 377 states and 498 transitions. [2020-10-27 14:15:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:15:54,171 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 101 [2020-10-27 14:15:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:54,172 INFO L225 Difference]: With dead ends: 377 [2020-10-27 14:15:54,172 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 14:15:54,173 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 [2020-10-27 14:15:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 14:15:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2020-10-27 14:15:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-27 14:15:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 254 transitions. [2020-10-27 14:15:54,182 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 254 transitions. Word has length 101 [2020-10-27 14:15:54,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:54,183 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 254 transitions. [2020-10-27 14:15:54,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:15:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 254 transitions. [2020-10-27 14:15:54,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 14:15:54,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:54,184 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:54,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:15:54,185 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:54,185 INFO L82 PathProgramCache]: Analyzing trace with hash 563475157, now seen corresponding path program 28 times [2020-10-27 14:15:54,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:54,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033624435] [2020-10-27 14:15:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:54,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:54,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:58,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:58,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 14:15:58,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:58,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4293 [2020-10-27 14:15:58,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:15:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 14:15:58,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:59,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:59,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:59,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:59,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:59,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:59,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:59,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:59,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:59,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:59,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:59,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 1 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:59,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033624435] [2020-10-27 14:15:59,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:59,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:15:59,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999899941] [2020-10-27 14:15:59,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:15:59,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:59,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:15:59,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:15:59,223 INFO L87 Difference]: Start difference. First operand 194 states and 254 transitions. Second operand 32 states. [2020-10-27 14:15:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:59,524 INFO L93 Difference]: Finished difference Result 389 states and 514 transitions. [2020-10-27 14:15:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:15:59,526 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 104 [2020-10-27 14:15:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:59,528 INFO L225 Difference]: With dead ends: 389 [2020-10-27 14:15:59,528 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 14:15:59,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:15:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 14:15:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2020-10-27 14:15:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 14:15:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 262 transitions. [2020-10-27 14:15:59,547 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 262 transitions. Word has length 104 [2020-10-27 14:15:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:59,548 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-10-27 14:15:59,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:15:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 262 transitions. [2020-10-27 14:15:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 14:15:59,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:59,549 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:59,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:15:59,551 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:59,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1621240360, now seen corresponding path program 29 times [2020-10-27 14:15:59,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:59,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876423311] [2020-10-27 14:15:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:59,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:59,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:04,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:04,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 14:16:04,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:16:04,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4808 [2020-10-27 14:16:04,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:04,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:16:04,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:04,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 14:16:04,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:05,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:05,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:05,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:05,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:05,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:05,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:16:05,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:05,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:05,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:05,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:05,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 1 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:05,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876423311] [2020-10-27 14:16:05,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:05,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:16:05,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237613291] [2020-10-27 14:16:05,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:16:05,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:05,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:16:05,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:16:05,175 INFO L87 Difference]: Start difference. First operand 200 states and 262 transitions. Second operand 33 states. [2020-10-27 14:16:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:05,480 INFO L93 Difference]: Finished difference Result 401 states and 530 transitions. [2020-10-27 14:16:05,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:16:05,480 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 107 [2020-10-27 14:16:05,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:05,483 INFO L225 Difference]: With dead ends: 401 [2020-10-27 14:16:05,484 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 14:16:05,485 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 [2020-10-27 14:16:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 14:16:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2020-10-27 14:16:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-27 14:16:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2020-10-27 14:16:05,498 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 107 [2020-10-27 14:16:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:05,498 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2020-10-27 14:16:05,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:16:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2020-10-27 14:16:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 14:16:05,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:05,500 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:05,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:16:05,500 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:05,501 INFO L82 PathProgramCache]: Analyzing trace with hash -546803723, now seen corresponding path program 30 times [2020-10-27 14:16:05,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:05,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040311933] [2020-10-27 14:16:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:05,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:05,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:10,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:10,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 14:16:10,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:16:10,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:16:10,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:10,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:16:10,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:10,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 14:16:10,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:11,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:11,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:11,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:11,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:11,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:11,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:11,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:11,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:11,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:11,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:11,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:11,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040311933] [2020-10-27 14:16:11,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:11,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:16:11,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721344713] [2020-10-27 14:16:11,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:16:11,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:11,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:16:11,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:16:11,355 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand 34 states. [2020-10-27 14:16:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:11,845 INFO L93 Difference]: Finished difference Result 413 states and 546 transitions. [2020-10-27 14:16:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:16:11,846 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 110 [2020-10-27 14:16:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:11,848 INFO L225 Difference]: With dead ends: 413 [2020-10-27 14:16:11,848 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 14:16:11,849 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 [2020-10-27 14:16:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 14:16:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2020-10-27 14:16:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-27 14:16:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 278 transitions. [2020-10-27 14:16:11,863 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 278 transitions. Word has length 110 [2020-10-27 14:16:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:11,864 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 278 transitions. [2020-10-27 14:16:11,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:16:11,867 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 278 transitions. [2020-10-27 14:16:11,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:16:11,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:11,869 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:11,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:16:11,869 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:11,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1898759352, now seen corresponding path program 31 times [2020-10-27 14:16:11,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:11,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183894998] [2020-10-27 14:16:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:11,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:11,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:16,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:16,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:16:16,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:16:16,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:16:16,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:16,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:16:16,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:16,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 14:16:16,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:17,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:17,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:17,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:17,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:17,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:17,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:16:17,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:17,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:17,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:17,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:17,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 1 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:17,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183894998] [2020-10-27 14:16:17,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:17,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:16:17,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037464212] [2020-10-27 14:16:17,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:16:17,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:16:17,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:16:17,758 INFO L87 Difference]: Start difference. First operand 212 states and 278 transitions. Second operand 35 states. [2020-10-27 14:16:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:18,147 INFO L93 Difference]: Finished difference Result 425 states and 562 transitions. [2020-10-27 14:16:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:16:18,148 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 113 [2020-10-27 14:16:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:18,150 INFO L225 Difference]: With dead ends: 425 [2020-10-27 14:16:18,150 INFO L226 Difference]: Without dead ends: 222 [2020-10-27 14:16:18,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:16:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-27 14:16:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 218. [2020-10-27 14:16:18,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-27 14:16:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 286 transitions. [2020-10-27 14:16:18,160 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 286 transitions. Word has length 113 [2020-10-27 14:16:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:18,160 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 286 transitions. [2020-10-27 14:16:18,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:16:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 286 transitions. [2020-10-27 14:16:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 14:16:18,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:18,162 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:18,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:16:18,162 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:18,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2138084629, now seen corresponding path program 32 times [2020-10-27 14:16:18,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:18,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570892510] [2020-10-27 14:16:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:18,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:18,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:23,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:23,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 14:16:23,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:16:23,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:16:23,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:23,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:16:23,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:23,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 14:16:23,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:24,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:24,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:24,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:24,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:24,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:24,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:24,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:24,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:24,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:24,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:24,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 1 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:24,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570892510] [2020-10-27 14:16:24,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:24,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:16:24,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414319439] [2020-10-27 14:16:24,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:16:24,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:24,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:16:24,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:16:24,133 INFO L87 Difference]: Start difference. First operand 218 states and 286 transitions. Second operand 36 states. [2020-10-27 14:16:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:24,645 INFO L93 Difference]: Finished difference Result 437 states and 578 transitions. [2020-10-27 14:16:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:16:24,646 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 116 [2020-10-27 14:16:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:24,647 INFO L225 Difference]: With dead ends: 437 [2020-10-27 14:16:24,648 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 14:16:24,651 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 [2020-10-27 14:16:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 14:16:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2020-10-27 14:16:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-27 14:16:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 294 transitions. [2020-10-27 14:16:24,665 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 294 transitions. Word has length 116 [2020-10-27 14:16:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:24,665 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 294 transitions. [2020-10-27 14:16:24,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:16:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 294 transitions. [2020-10-27 14:16:24,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 14:16:24,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:24,667 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:24,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:16:24,668 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:24,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2063266920, now seen corresponding path program 33 times [2020-10-27 14:16:24,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:24,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059010034] [2020-10-27 14:16:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:24,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:24,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:29,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:29,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 14:16:29,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:16:29,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:16:29,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:29,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:16:29,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:29,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 14:16:29,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:30,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:30,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:30,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:30,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:30,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:30,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:30,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:30,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:30,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:30,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:30,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 1 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:30,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059010034] [2020-10-27 14:16:30,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:30,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:16:30,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686086863] [2020-10-27 14:16:30,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:16:30,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:30,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:16:30,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:16:30,655 INFO L87 Difference]: Start difference. First operand 224 states and 294 transitions. Second operand 37 states. [2020-10-27 14:16:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:31,014 INFO L93 Difference]: Finished difference Result 449 states and 594 transitions. [2020-10-27 14:16:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:16:31,015 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 119 [2020-10-27 14:16:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:31,017 INFO L225 Difference]: With dead ends: 449 [2020-10-27 14:16:31,017 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 14:16:31,018 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 [2020-10-27 14:16:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 14:16:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2020-10-27 14:16:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-27 14:16:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 302 transitions. [2020-10-27 14:16:31,027 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 302 transitions. Word has length 119 [2020-10-27 14:16:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:31,027 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 302 transitions. [2020-10-27 14:16:31,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:16:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 302 transitions. [2020-10-27 14:16:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 14:16:31,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:31,029 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:31,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:16:31,029 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:31,030 INFO L82 PathProgramCache]: Analyzing trace with hash -590323147, now seen corresponding path program 34 times [2020-10-27 14:16:31,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:31,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775928311] [2020-10-27 14:16:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:31,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:31,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:36,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:36,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 14:16:36,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:16:36,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:16:36,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:36,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:16:36,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:36,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 14:16:36,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:36,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:36,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:36,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:36,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:36,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:36,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 1 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775928311] [2020-10-27 14:16:37,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:37,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:16:37,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542265383] [2020-10-27 14:16:37,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:16:37,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:37,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:16:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:16:37,002 INFO L87 Difference]: Start difference. First operand 230 states and 302 transitions. Second operand 38 states. [2020-10-27 14:16:37,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:37,345 INFO L93 Difference]: Finished difference Result 461 states and 610 transitions. [2020-10-27 14:16:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:16:37,347 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 122 [2020-10-27 14:16:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:37,348 INFO L225 Difference]: With dead ends: 461 [2020-10-27 14:16:37,348 INFO L226 Difference]: Without dead ends: 240 [2020-10-27 14:16:37,350 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 [2020-10-27 14:16:37,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-27 14:16:37,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 236. [2020-10-27 14:16:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-27 14:16:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 310 transitions. [2020-10-27 14:16:37,359 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 310 transitions. Word has length 122 [2020-10-27 14:16:37,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:37,359 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 310 transitions. [2020-10-27 14:16:37,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:16:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 310 transitions. [2020-10-27 14:16:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 14:16:37,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:37,360 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:37,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:16:37,361 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1803244936, now seen corresponding path program 35 times [2020-10-27 14:16:37,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:37,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293155164] [2020-10-27 14:16:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:37,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:37,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:42,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:42,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 14:16:42,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:16:42,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-27 14:16:42,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:42,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:16:42,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:42,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 14:16:42,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:43,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:43,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:43,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:43,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:43,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:43,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:43,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:43,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:43,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:43,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1821 backedges. 1 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:43,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293155164] [2020-10-27 14:16:43,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:43,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:16:43,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733015479] [2020-10-27 14:16:43,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:16:43,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:43,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:16:43,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:16:43,479 INFO L87 Difference]: Start difference. First operand 236 states and 310 transitions. Second operand 39 states. [2020-10-27 14:16:43,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:43,965 INFO L93 Difference]: Finished difference Result 473 states and 626 transitions. [2020-10-27 14:16:43,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:16:43,966 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 125 [2020-10-27 14:16:43,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:43,968 INFO L225 Difference]: With dead ends: 473 [2020-10-27 14:16:43,968 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 14:16:43,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:16:43,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 14:16:43,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242. [2020-10-27 14:16:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-27 14:16:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 318 transitions. [2020-10-27 14:16:43,978 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 318 transitions. Word has length 125 [2020-10-27 14:16:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:43,978 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 318 transitions. [2020-10-27 14:16:43,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:16:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 318 transitions. [2020-10-27 14:16:43,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 14:16:43,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:43,979 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:43,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:16:43,980 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:43,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1898567509, now seen corresponding path program 36 times [2020-10-27 14:16:43,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:43,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416547467] [2020-10-27 14:16:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:43,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:44,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:49,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:49,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 14:16:49,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:16:49,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 14:16:49,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:49,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:16:49,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:49,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 14:16:49,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:50,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:50,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:50,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:50,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:50,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:50,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:50,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:50,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 1 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:50,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416547467] [2020-10-27 14:16:50,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:50,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:16:50,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577325570] [2020-10-27 14:16:50,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:16:50,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:50,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:16:50,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:16:50,160 INFO L87 Difference]: Start difference. First operand 242 states and 318 transitions. Second operand 40 states. [2020-10-27 14:16:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:50,585 INFO L93 Difference]: Finished difference Result 485 states and 642 transitions. [2020-10-27 14:16:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:16:50,588 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 128 [2020-10-27 14:16:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:50,590 INFO L225 Difference]: With dead ends: 485 [2020-10-27 14:16:50,590 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 14:16:50,592 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 [2020-10-27 14:16:50,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 14:16:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2020-10-27 14:16:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-27 14:16:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 326 transitions. [2020-10-27 14:16:50,600 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 326 transitions. Word has length 128 [2020-10-27 14:16:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:50,600 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 326 transitions. [2020-10-27 14:16:50,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:16:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 326 transitions. [2020-10-27 14:16:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 14:16:50,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:50,601 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:50,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:16:50,602 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash 717857112, now seen corresponding path program 37 times [2020-10-27 14:16:50,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:50,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108770175] [2020-10-27 14:16:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:50,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:50,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:55,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:55,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 14:16:55,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:16:55,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:16:55,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:16:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 14:16:55,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:56,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:56,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:56,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:56,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:56,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:56,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:56,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2036 backedges. 1 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:56,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108770175] [2020-10-27 14:16:56,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:56,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:16:56,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002895929] [2020-10-27 14:16:56,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:16:56,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:56,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:16:56,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:16:56,781 INFO L87 Difference]: Start difference. First operand 248 states and 326 transitions. Second operand 41 states. [2020-10-27 14:16:57,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:57,270 INFO L93 Difference]: Finished difference Result 497 states and 658 transitions. [2020-10-27 14:16:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:16:57,273 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 131 [2020-10-27 14:16:57,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:57,275 INFO L225 Difference]: With dead ends: 497 [2020-10-27 14:16:57,275 INFO L226 Difference]: Without dead ends: 258 [2020-10-27 14:16:57,276 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 [2020-10-27 14:16:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-27 14:16:57,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2020-10-27 14:16:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-27 14:16:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 334 transitions. [2020-10-27 14:16:57,284 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 334 transitions. Word has length 131 [2020-10-27 14:16:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:57,285 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 334 transitions. [2020-10-27 14:16:57,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:16:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 334 transitions. [2020-10-27 14:16:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 14:16:57,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:57,286 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:57,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:16:57,287 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:57,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:57,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1956574325, now seen corresponding path program 38 times [2020-10-27 14:16:57,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:57,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361845159] [2020-10-27 14:16:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:57,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:57,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:02,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:02,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 14:17:02,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:17:02,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 14:17:02,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:17:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 14:17:02,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:03,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:03,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:03,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:03,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:03,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:03,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:17:03,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:03,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 1 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:03,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361845159] [2020-10-27 14:17:03,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:03,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 14:17:03,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051815304] [2020-10-27 14:17:03,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 14:17:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 14:17:03,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:17:03,584 INFO L87 Difference]: Start difference. First operand 254 states and 334 transitions. Second operand 42 states. [2020-10-27 14:17:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:04,183 INFO L93 Difference]: Finished difference Result 509 states and 674 transitions. [2020-10-27 14:17:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:17:04,184 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 134 [2020-10-27 14:17:04,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:04,185 INFO L225 Difference]: With dead ends: 509 [2020-10-27 14:17:04,185 INFO L226 Difference]: Without dead ends: 264 [2020-10-27 14:17:04,186 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 [2020-10-27 14:17:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-27 14:17:04,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2020-10-27 14:17:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 14:17:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 342 transitions. [2020-10-27 14:17:04,194 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 342 transitions. Word has length 134 [2020-10-27 14:17:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:04,194 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 342 transitions. [2020-10-27 14:17:04,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 14:17:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 342 transitions. [2020-10-27 14:17:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 14:17:04,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:04,197 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:04,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:17:04,198 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:04,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2072907720, now seen corresponding path program 39 times [2020-10-27 14:17:04,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:04,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228021432] [2020-10-27 14:17:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:04,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:04,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:09,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:09,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 14:17:09,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:17:09,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:17:09,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:09,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:17:09,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:09,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-27 14:17:09,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:10,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:10,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:10,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:10,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:10,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:10,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:10,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:10,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:10,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:10,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:10,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 1 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:10,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228021432] [2020-10-27 14:17:10,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:10,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 14:17:10,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143870156] [2020-10-27 14:17:10,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 14:17:10,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:10,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 14:17:10,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:17:10,467 INFO L87 Difference]: Start difference. First operand 260 states and 342 transitions. Second operand 43 states. [2020-10-27 14:17:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:11,048 INFO L93 Difference]: Finished difference Result 521 states and 690 transitions. [2020-10-27 14:17:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:17:11,049 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 137 [2020-10-27 14:17:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:11,050 INFO L225 Difference]: With dead ends: 521 [2020-10-27 14:17:11,050 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 14:17:11,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:17:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 14:17:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2020-10-27 14:17:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-27 14:17:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 350 transitions. [2020-10-27 14:17:11,060 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 350 transitions. Word has length 137 [2020-10-27 14:17:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:11,061 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 350 transitions. [2020-10-27 14:17:11,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 14:17:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 350 transitions. [2020-10-27 14:17:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 14:17:11,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:11,062 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:11,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 14:17:11,062 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:11,063 INFO L82 PathProgramCache]: Analyzing trace with hash -36587115, now seen corresponding path program 40 times [2020-10-27 14:17:11,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:11,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119325840] [2020-10-27 14:17:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:11,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:11,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:16,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:16,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 14:17:16,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:17:16,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:17:16,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:16,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 14:17:16,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:16,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 14:17:16,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:17,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:17,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:17,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:17,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:17,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:17,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:17,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:17,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:17,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:17,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:17,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:17,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119325840] [2020-10-27 14:17:17,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:17,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 14:17:17,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464326941] [2020-10-27 14:17:17,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 14:17:17,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:17,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 14:17:17,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:17:17,449 INFO L87 Difference]: Start difference. First operand 266 states and 350 transitions. Second operand 44 states. [2020-10-27 14:17:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:17,867 INFO L93 Difference]: Finished difference Result 533 states and 706 transitions. [2020-10-27 14:17:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 14:17:17,867 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 140 [2020-10-27 14:17:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:17,869 INFO L225 Difference]: With dead ends: 533 [2020-10-27 14:17:17,869 INFO L226 Difference]: Without dead ends: 276 [2020-10-27 14:17:17,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:17:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-27 14:17:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 272. [2020-10-27 14:17:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-27 14:17:17,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 358 transitions. [2020-10-27 14:17:17,880 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 358 transitions. Word has length 140 [2020-10-27 14:17:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:17,881 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 358 transitions. [2020-10-27 14:17:17,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 14:17:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 358 transitions. [2020-10-27 14:17:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 14:17:17,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:17,890 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:17,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 14:17:17,890 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1872467736, now seen corresponding path program 41 times [2020-10-27 14:17:17,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:17,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336179300] [2020-10-27 14:17:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:18,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:22,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:22,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 14:17:22,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:17:22,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 14:17:22,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:22,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 14:17:22,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:22,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-27 14:17:22,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:24,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:24,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:24,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:24,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:24,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:24,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:24,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:24,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:24,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2502 backedges. 1 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:24,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336179300] [2020-10-27 14:17:24,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:24,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 14:17:24,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500697387] [2020-10-27 14:17:24,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 14:17:24,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:24,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 14:17:24,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:17:24,295 INFO L87 Difference]: Start difference. First operand 272 states and 358 transitions. Second operand 45 states. [2020-10-27 14:17:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:24,934 INFO L93 Difference]: Finished difference Result 545 states and 722 transitions. [2020-10-27 14:17:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 14:17:24,935 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 143 [2020-10-27 14:17:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:24,937 INFO L225 Difference]: With dead ends: 545 [2020-10-27 14:17:24,937 INFO L226 Difference]: Without dead ends: 282 [2020-10-27 14:17:24,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:17:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-27 14:17:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 278. [2020-10-27 14:17:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-27 14:17:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 366 transitions. [2020-10-27 14:17:24,952 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 366 transitions. Word has length 143 [2020-10-27 14:17:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:24,952 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 366 transitions. [2020-10-27 14:17:24,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 14:17:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 366 transitions. [2020-10-27 14:17:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 14:17:24,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:24,955 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:24,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 14:17:24,955 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:24,955 INFO L82 PathProgramCache]: Analyzing trace with hash 568600245, now seen corresponding path program 42 times [2020-10-27 14:17:24,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:24,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721247845] [2020-10-27 14:17:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:24,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:25,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:30,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:30,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 14:17:30,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:17:30,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-27 14:17:30,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 14:17:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 14:17:30,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:31,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:31,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:31,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:31,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:31,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:31,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:31,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:31,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2626 backedges. 1 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:31,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721247845] [2020-10-27 14:17:31,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:31,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 14:17:31,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871030927] [2020-10-27 14:17:31,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 14:17:31,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:31,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 14:17:31,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:17:31,463 INFO L87 Difference]: Start difference. First operand 278 states and 366 transitions. Second operand 46 states. [2020-10-27 14:17:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:31,839 INFO L93 Difference]: Finished difference Result 557 states and 738 transitions. [2020-10-27 14:17:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 14:17:31,840 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 146 [2020-10-27 14:17:31,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:31,842 INFO L225 Difference]: With dead ends: 557 [2020-10-27 14:17:31,842 INFO L226 Difference]: Without dead ends: 288 [2020-10-27 14:17:31,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:17:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-27 14:17:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2020-10-27 14:17:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-27 14:17:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 374 transitions. [2020-10-27 14:17:31,849 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 374 transitions. Word has length 146 [2020-10-27 14:17:31,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:31,850 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 374 transitions. [2020-10-27 14:17:31,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 14:17:31,850 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 374 transitions. [2020-10-27 14:17:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 14:17:31,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:31,851 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:31,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 14:17:31,851 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:31,851 INFO L82 PathProgramCache]: Analyzing trace with hash 736400888, now seen corresponding path program 43 times [2020-10-27 14:17:31,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:31,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561955490] [2020-10-27 14:17:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:31,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:32,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:36,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:36,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 14:17:36,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:17:36,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:17:36,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:36,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 14:17:36,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:36,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-27 14:17:36,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:38,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:38,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:38,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:38,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:38,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:38,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2753 backedges. 1 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:38,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561955490] [2020-10-27 14:17:38,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:38,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 14:17:38,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062166503] [2020-10-27 14:17:38,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 14:17:38,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:38,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 14:17:38,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:17:38,412 INFO L87 Difference]: Start difference. First operand 284 states and 374 transitions. Second operand 47 states. [2020-10-27 14:17:39,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:39,020 INFO L93 Difference]: Finished difference Result 569 states and 754 transitions. [2020-10-27 14:17:39,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:17:39,021 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 149 [2020-10-27 14:17:39,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:39,023 INFO L225 Difference]: With dead ends: 569 [2020-10-27 14:17:39,023 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 14:17:39,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:17:39,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 14:17:39,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 290. [2020-10-27 14:17:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-27 14:17:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 382 transitions. [2020-10-27 14:17:39,033 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 382 transitions. Word has length 149 [2020-10-27 14:17:39,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:39,033 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 382 transitions. [2020-10-27 14:17:39,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 14:17:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 382 transitions. [2020-10-27 14:17:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-27 14:17:39,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:39,035 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:39,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 14:17:39,035 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash 343423957, now seen corresponding path program 44 times [2020-10-27 14:17:39,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:39,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358296264] [2020-10-27 14:17:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:39,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:39,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:44,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:44,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 14:17:44,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:17:44,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:17:44,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 14:17:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-27 14:17:44,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:45,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:45,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:45,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:45,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:45,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:45,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:45,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:45,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:45,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:45,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:45,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 1 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:45,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358296264] [2020-10-27 14:17:45,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:45,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 14:17:45,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767098330] [2020-10-27 14:17:45,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 14:17:45,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:45,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 14:17:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:17:45,672 INFO L87 Difference]: Start difference. First operand 290 states and 382 transitions. Second operand 48 states. [2020-10-27 14:17:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:46,216 INFO L93 Difference]: Finished difference Result 581 states and 770 transitions. [2020-10-27 14:17:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 14:17:46,216 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 152 [2020-10-27 14:17:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:46,218 INFO L225 Difference]: With dead ends: 581 [2020-10-27 14:17:46,218 INFO L226 Difference]: Without dead ends: 300 [2020-10-27 14:17:46,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:17:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-27 14:17:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 296. [2020-10-27 14:17:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-27 14:17:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 390 transitions. [2020-10-27 14:17:46,228 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 390 transitions. Word has length 152 [2020-10-27 14:17:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:46,229 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 390 transitions. [2020-10-27 14:17:46,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 14:17:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 390 transitions. [2020-10-27 14:17:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 14:17:46,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:46,230 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:46,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 14:17:46,231 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:46,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1248521432, now seen corresponding path program 45 times [2020-10-27 14:17:46,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:46,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956223255] [2020-10-27 14:17:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:46,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:46,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:51,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:51,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 14:17:51,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:17:51,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-27 14:17:51,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:51,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 14:17:51,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:51,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-27 14:17:51,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:52,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:52,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:52,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:52,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:52,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:52,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:52,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:52,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:52,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:52,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:52,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 1 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:52,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956223255] [2020-10-27 14:17:52,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:52,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 14:17:52,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424374562] [2020-10-27 14:17:52,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 14:17:52,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:52,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 14:17:52,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:17:52,943 INFO L87 Difference]: Start difference. First operand 296 states and 390 transitions. Second operand 49 states. [2020-10-27 14:17:53,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:53,644 INFO L93 Difference]: Finished difference Result 593 states and 786 transitions. [2020-10-27 14:17:53,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 14:17:53,648 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 155 [2020-10-27 14:17:53,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:53,651 INFO L225 Difference]: With dead ends: 593 [2020-10-27 14:17:53,651 INFO L226 Difference]: Without dead ends: 306 [2020-10-27 14:17:53,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:17:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-27 14:17:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 302. [2020-10-27 14:17:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-27 14:17:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 398 transitions. [2020-10-27 14:17:53,662 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 398 transitions. Word has length 155 [2020-10-27 14:17:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:53,663 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 398 transitions. [2020-10-27 14:17:53,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 14:17:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 398 transitions. [2020-10-27 14:17:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 14:17:53,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:53,664 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:53,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 14:17:53,665 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:53,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1202714869, now seen corresponding path program 46 times [2020-10-27 14:17:53,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:53,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544289966] [2020-10-27 14:17:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:53,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:53,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:58,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:58,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 14:17:58,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:17:58,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:17:58,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:58,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 14:17:58,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:58,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-27 14:17:58,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:00,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:00,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:00,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:00,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:00,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:00,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:00,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:00,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:00,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:00,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:00,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 1 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:00,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544289966] [2020-10-27 14:18:00,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:00,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 14:18:00,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045343079] [2020-10-27 14:18:00,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 14:18:00,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:00,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 14:18:00,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 14:18:00,507 INFO L87 Difference]: Start difference. First operand 302 states and 398 transitions. Second operand 50 states. [2020-10-27 14:18:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:01,060 INFO L93 Difference]: Finished difference Result 605 states and 802 transitions. [2020-10-27 14:18:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 14:18:01,060 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 158 [2020-10-27 14:18:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:01,063 INFO L225 Difference]: With dead ends: 605 [2020-10-27 14:18:01,063 INFO L226 Difference]: Without dead ends: 312 [2020-10-27 14:18:01,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 14:18:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-27 14:18:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 308. [2020-10-27 14:18:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-27 14:18:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 406 transitions. [2020-10-27 14:18:01,076 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 406 transitions. Word has length 158 [2020-10-27 14:18:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:01,076 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 406 transitions. [2020-10-27 14:18:01,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 14:18:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 406 transitions. [2020-10-27 14:18:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 14:18:01,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:01,078 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:01,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 14:18:01,078 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1915970632, now seen corresponding path program 47 times [2020-10-27 14:18:01,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:01,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261916592] [2020-10-27 14:18:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:01,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:01,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:06,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:06,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 14:18:06,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:18:06,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-27 14:18:06,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 14:18:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 14:18:06,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:07,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:07,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:07,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:07,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:07,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:07,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:07,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:07,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 1 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:08,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261916592] [2020-10-27 14:18:08,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:08,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 14:18:08,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525003412] [2020-10-27 14:18:08,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 14:18:08,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:08,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 14:18:08,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:18:08,008 INFO L87 Difference]: Start difference. First operand 308 states and 406 transitions. Second operand 51 states. [2020-10-27 14:18:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:08,708 INFO L93 Difference]: Finished difference Result 617 states and 818 transitions. [2020-10-27 14:18:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 14:18:08,708 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 161 [2020-10-27 14:18:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:08,711 INFO L225 Difference]: With dead ends: 617 [2020-10-27 14:18:08,711 INFO L226 Difference]: Without dead ends: 318 [2020-10-27 14:18:08,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:18:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-27 14:18:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2020-10-27 14:18:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-27 14:18:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 414 transitions. [2020-10-27 14:18:08,722 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 414 transitions. Word has length 161 [2020-10-27 14:18:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:08,722 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 414 transitions. [2020-10-27 14:18:08,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 14:18:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 414 transitions. [2020-10-27 14:18:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-27 14:18:08,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:08,724 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:08,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 14:18:08,724 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:08,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1943183851, now seen corresponding path program 48 times [2020-10-27 14:18:08,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:08,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494895936] [2020-10-27 14:18:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:08,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:08,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:13,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:13,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-27 14:18:13,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:18:13,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-27 14:18:13,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:13,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 14:18:13,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:13,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-27 14:18:13,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:15,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:15,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:15,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:15,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:15,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:15,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:18:15,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:15,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:15,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:15,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:15,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3433 backedges. 1 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:15,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494895936] [2020-10-27 14:18:15,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:15,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 14:18:15,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424784554] [2020-10-27 14:18:15,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 14:18:15,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:15,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 14:18:15,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 14:18:15,711 INFO L87 Difference]: Start difference. First operand 314 states and 414 transitions. Second operand 52 states. [2020-10-27 14:18:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:16,495 INFO L93 Difference]: Finished difference Result 629 states and 834 transitions. [2020-10-27 14:18:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 14:18:16,496 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 164 [2020-10-27 14:18:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:16,498 INFO L225 Difference]: With dead ends: 629 [2020-10-27 14:18:16,498 INFO L226 Difference]: Without dead ends: 324 [2020-10-27 14:18:16,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 14:18:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-27 14:18:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 320. [2020-10-27 14:18:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-27 14:18:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 422 transitions. [2020-10-27 14:18:16,506 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 422 transitions. Word has length 164 [2020-10-27 14:18:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:16,507 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 422 transitions. [2020-10-27 14:18:16,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 14:18:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 422 transitions. [2020-10-27 14:18:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 14:18:16,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:16,508 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:16,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 14:18:16,509 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:16,509 INFO L82 PathProgramCache]: Analyzing trace with hash -903372136, now seen corresponding path program 49 times [2020-10-27 14:18:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:16,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599782780] [2020-10-27 14:18:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:16,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:21,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:21,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 14:18:21,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:18:21,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-27 14:18:21,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:21,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 14:18:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-27 14:18:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:23,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:23,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:23,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:23,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:23,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:23,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:18:23,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:23,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3578 backedges. 1 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:23,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599782780] [2020-10-27 14:18:23,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:23,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 14:18:23,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610087625] [2020-10-27 14:18:23,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 14:18:23,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:23,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 14:18:23,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 14:18:23,579 INFO L87 Difference]: Start difference. First operand 320 states and 422 transitions. Second operand 53 states. [2020-10-27 14:18:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:24,331 INFO L93 Difference]: Finished difference Result 641 states and 850 transitions. [2020-10-27 14:18:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 14:18:24,331 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 167 [2020-10-27 14:18:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:24,333 INFO L225 Difference]: With dead ends: 641 [2020-10-27 14:18:24,333 INFO L226 Difference]: Without dead ends: 330 [2020-10-27 14:18:24,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 14:18:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-27 14:18:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 326. [2020-10-27 14:18:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-27 14:18:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 430 transitions. [2020-10-27 14:18:24,343 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 430 transitions. Word has length 167 [2020-10-27 14:18:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:24,344 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 430 transitions. [2020-10-27 14:18:24,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 14:18:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 430 transitions. [2020-10-27 14:18:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 14:18:24,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:24,345 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:24,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 14:18:24,346 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:24,346 INFO L82 PathProgramCache]: Analyzing trace with hash 823290677, now seen corresponding path program 50 times [2020-10-27 14:18:24,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:24,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612574296] [2020-10-27 14:18:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:24,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:24,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:29,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 14:18:29,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:18:29,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:18:29,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:29,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 14:18:29,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:29,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-27 14:18:29,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:31,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:31,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:31,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:31,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:31,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:18:31,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:31,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3726 backedges. 1 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:31,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612574296] [2020-10-27 14:18:31,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:31,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 14:18:31,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481012492] [2020-10-27 14:18:31,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 14:18:31,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:31,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 14:18:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 14:18:31,404 INFO L87 Difference]: Start difference. First operand 326 states and 430 transitions. Second operand 54 states. [2020-10-27 14:18:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:32,198 INFO L93 Difference]: Finished difference Result 653 states and 866 transitions. [2020-10-27 14:18:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 14:18:32,199 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 170 [2020-10-27 14:18:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:32,201 INFO L225 Difference]: With dead ends: 653 [2020-10-27 14:18:32,201 INFO L226 Difference]: Without dead ends: 336 [2020-10-27 14:18:32,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 14:18:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-27 14:18:32,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 332. [2020-10-27 14:18:32,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-27 14:18:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 438 transitions. [2020-10-27 14:18:32,211 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 438 transitions. Word has length 170 [2020-10-27 14:18:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:32,211 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 438 transitions. [2020-10-27 14:18:32,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 14:18:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 438 transitions. [2020-10-27 14:18:32,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:18:32,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:32,213 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:32,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 14:18:32,213 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:32,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:32,214 INFO L82 PathProgramCache]: Analyzing trace with hash -988151432, now seen corresponding path program 51 times [2020-10-27 14:18:32,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:32,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791664327] [2020-10-27 14:18:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:37,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:37,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 14:18:37,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:18:37,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:18:37,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:37,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 14:18:37,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:37,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 14:18:37,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:39,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:39,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:39,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:39,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:39,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:39,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:39,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:39,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3877 backedges. 1 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:39,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791664327] [2020-10-27 14:18:39,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:39,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 14:18:39,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909051680] [2020-10-27 14:18:39,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 14:18:39,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:39,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 14:18:39,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 14:18:39,444 INFO L87 Difference]: Start difference. First operand 332 states and 438 transitions. Second operand 55 states. [2020-10-27 14:18:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:40,226 INFO L93 Difference]: Finished difference Result 665 states and 882 transitions. [2020-10-27 14:18:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 14:18:40,227 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 173 [2020-10-27 14:18:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:40,228 INFO L225 Difference]: With dead ends: 665 [2020-10-27 14:18:40,228 INFO L226 Difference]: Without dead ends: 342 [2020-10-27 14:18:40,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 14:18:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-27 14:18:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 338. [2020-10-27 14:18:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-27 14:18:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 446 transitions. [2020-10-27 14:18:40,239 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 446 transitions. Word has length 173 [2020-10-27 14:18:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:40,239 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 446 transitions. [2020-10-27 14:18:40,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 14:18:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 446 transitions. [2020-10-27 14:18:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 14:18:40,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:40,241 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:40,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 14:18:40,241 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:40,242 INFO L82 PathProgramCache]: Analyzing trace with hash 604053589, now seen corresponding path program 52 times [2020-10-27 14:18:40,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:40,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234687476] [2020-10-27 14:18:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:40,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:40,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:45,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:45,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 14:18:45,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:18:45,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-27 14:18:45,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:45,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 14:18:45,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:45,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-27 14:18:45,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:47,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:47,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:47,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:47,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:47,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:47,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:47,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:47,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:47,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:47,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:47,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4031 backedges. 1 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:47,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234687476] [2020-10-27 14:18:47,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:47,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 14:18:47,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131745733] [2020-10-27 14:18:47,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 14:18:47,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:47,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 14:18:47,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 14:18:47,557 INFO L87 Difference]: Start difference. First operand 338 states and 446 transitions. Second operand 56 states. [2020-10-27 14:18:48,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:48,362 INFO L93 Difference]: Finished difference Result 677 states and 898 transitions. [2020-10-27 14:18:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 14:18:48,363 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 176 [2020-10-27 14:18:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:48,365 INFO L225 Difference]: With dead ends: 677 [2020-10-27 14:18:48,365 INFO L226 Difference]: Without dead ends: 348 [2020-10-27 14:18:48,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 14:18:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-27 14:18:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2020-10-27 14:18:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-27 14:18:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 454 transitions. [2020-10-27 14:18:48,372 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 454 transitions. Word has length 176 [2020-10-27 14:18:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:48,372 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 454 transitions. [2020-10-27 14:18:48,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 14:18:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 454 transitions. [2020-10-27 14:18:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-27 14:18:48,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:48,374 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:48,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 14:18:48,374 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:48,374 INFO L82 PathProgramCache]: Analyzing trace with hash 365017176, now seen corresponding path program 53 times [2020-10-27 14:18:48,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:48,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751177565] [2020-10-27 14:18:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:48,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking...