/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:46:41,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:46:41,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:46:41,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:46:41,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:46:41,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:46:41,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:46:41,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:46:41,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:46:41,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:46:41,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:46:41,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:46:41,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:46:41,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:46:41,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:46:41,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:46:41,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:46:41,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:46:41,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:46:41,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:46:41,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:46:41,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:46:41,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:46:41,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:46:41,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:46:41,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:46:41,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:46:41,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:46:41,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:46:41,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:46:41,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:46:41,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:46:41,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:46:41,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:46:41,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:46:41,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:46:41,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:46:41,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:46:41,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:46:41,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:46:41,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:46:41,655 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 01:46:41,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:46:41,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:46:41,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:46:41,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:46:41,721 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:46:41,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:46:41,721 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:46:41,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:46:41,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:46:41,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:46:41,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:46:41,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:46:41,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:46:41,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:46:41,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:46:41,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:46:41,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:46:41,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:46:41,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:46:41,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:46:41,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:46:41,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:46:41,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:46:41,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:46:41,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:46:41,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:46:41,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:46:41,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:46:41,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:46:41,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:46:42,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:46:42,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:46:42,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:46:42,213 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:46:42,214 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:46:42,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c [2020-10-27 01:46:42,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf7bb0a78/7910d7d45be341309c0fe42f7a7a81f9/FLAGc64486f88 [2020-10-27 01:46:42,922 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:46:42,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de62.c [2020-10-27 01:46:42,931 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf7bb0a78/7910d7d45be341309c0fe42f7a7a81f9/FLAGc64486f88 [2020-10-27 01:46:43,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf7bb0a78/7910d7d45be341309c0fe42f7a7a81f9 [2020-10-27 01:46:43,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:46:43,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:46:43,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:46:43,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:46:43,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:46:43,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:46:43" (1/1) ... [2020-10-27 01:46:43,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e528147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43, skipping insertion in model container [2020-10-27 01:46:43,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:46:43" (1/1) ... [2020-10-27 01:46:43,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:46:43,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:46:43,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:46:43,630 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:46:43,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:46:43,668 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:46:43,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43 WrapperNode [2020-10-27 01:46:43,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:46:43,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:46:43,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:46:43,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:46:43,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43" (1/1) ... [2020-10-27 01:46:43,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43" (1/1) ... [2020-10-27 01:46:43,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43" (1/1) ... [2020-10-27 01:46:43,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43" (1/1) ... [2020-10-27 01:46:43,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43" (1/1) ... [2020-10-27 01:46:43,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43" (1/1) ... [2020-10-27 01:46:43,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43" (1/1) ... [2020-10-27 01:46:43,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:46:43,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:46:43,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:46:43,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:46:43,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43" (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 01:46:43,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:46:43,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:46:43,798 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:46:43,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:46:43,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:46:43,798 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:46:43,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:46:43,798 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:46:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:46:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 01:46:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:46:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:46:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:46:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:46:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:46:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:46:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:46:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:46:44,070 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:46:44,070 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-27 01:46:44,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:46:44 BoogieIcfgContainer [2020-10-27 01:46:44,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:46:44,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:46:44,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:46:44,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:46:44,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:46:43" (1/3) ... [2020-10-27 01:46:44,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6667584f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:46:44, skipping insertion in model container [2020-10-27 01:46:44,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:43" (2/3) ... [2020-10-27 01:46:44,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6667584f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:46:44, skipping insertion in model container [2020-10-27 01:46:44,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:46:44" (3/3) ... [2020-10-27 01:46:44,107 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de62.c [2020-10-27 01:46:44,122 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:46:44,127 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:46:44,144 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:46:44,175 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:46:44,175 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:46:44,175 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:46:44,175 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:46:44,175 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:46:44,176 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:46:44,176 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:46:44,176 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:46:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 01:46:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:46:44,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:44,203 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 01:46:44,203 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:44,213 INFO L82 PathProgramCache]: Analyzing trace with hash -929595754, now seen corresponding path program 1 times [2020-10-27 01:46:44,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:44,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031211839] [2020-10-27 01:46:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:44,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:44,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:46:44,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:44,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-27 01:46:44,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:44,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:46:44,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:46:44,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:46:44,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:46:45,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:45,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:45,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:45,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:45,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:45,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:46:45,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:45,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:45,089 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 01:46:45,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031211839] [2020-10-27 01:46:45,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:46:45,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:46:45,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616961829] [2020-10-27 01:46:45,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:46:45,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:45,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:46:45,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:46:45,117 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-10-27 01:46:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:45,439 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2020-10-27 01:46:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:46:45,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:46:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:45,449 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:46:45,449 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:46:45,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:46:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:46:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:46:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-10-27 01:46:45,499 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2020-10-27 01:46:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:45,499 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-10-27 01:46:45,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:46:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-10-27 01:46:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:46:45,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:45,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:45,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:46:45,502 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:45,503 INFO L82 PathProgramCache]: Analyzing trace with hash 956523487, now seen corresponding path program 1 times [2020-10-27 01:46:45,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:45,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367410160] [2020-10-27 01:46:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:45,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:45,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:45,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:45,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:46,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:46:46,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:46:46,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-27 01:46:46,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:46,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:46:46,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:46,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:46:46,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:46,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:46,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:46,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:46,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:46,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:46:46,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:46,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:46,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:46,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:46,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:46,095 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 01:46:46,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367410160] [2020-10-27 01:46:46,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:46:46,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:46:46,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682656284] [2020-10-27 01:46:46,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:46:46,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:46,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:46:46,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:46:46,099 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2020-10-27 01:46:46,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:46,198 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2020-10-27 01:46:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:46:46,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 01:46:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:46,201 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:46:46,202 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:46:46,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:46:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:46:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-27 01:46:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:46:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2020-10-27 01:46:46,213 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 19 [2020-10-27 01:46:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:46,213 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2020-10-27 01:46:46,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:46:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2020-10-27 01:46:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:46:46,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:46,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:46,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:46:46,215 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:46,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1494530896, now seen corresponding path program 1 times [2020-10-27 01:46:46,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:46,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149586166] [2020-10-27 01:46:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:46,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:46,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:46:46,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:46:46,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-27 01:46:46,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:46,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:46:46,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:46,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:46:46,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:46,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:46,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:46,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:46,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:46,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:46:46,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:46,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:46,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:46,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:46,635 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 01:46:46,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149586166] [2020-10-27 01:46:46,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:46:46,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:46:46,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60673304] [2020-10-27 01:46:46,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:46:46,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:46,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:46:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:46:46,645 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand 5 states. [2020-10-27 01:46:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:46,826 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2020-10-27 01:46:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:46:46,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 01:46:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:46,827 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:46:46,828 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:46:46,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:46:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:46:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:46:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2020-10-27 01:46:46,836 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 19 [2020-10-27 01:46:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:46,836 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2020-10-27 01:46:46,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:46:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2020-10-27 01:46:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:46:46,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:46,837 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 01:46:46,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:46:46,838 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1818741925, now seen corresponding path program 1 times [2020-10-27 01:46:46,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:46,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531959861] [2020-10-27 01:46:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:46,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:47,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:46:47,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:46:47,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-27 01:46:47,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:47,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:46:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:46:47,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:47,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:47,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:47,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:47,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:47,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:46:47,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:47,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:47,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:47,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:47,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:47,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531959861] [2020-10-27 01:46:47,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:47,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:46:47,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243367026] [2020-10-27 01:46:47,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:46:47,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:47,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:46:47,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:46:47,260 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 5 states. [2020-10-27 01:46:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:47,428 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2020-10-27 01:46:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:46:47,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-27 01:46:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:47,430 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:46:47,430 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:46:47,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:46:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:46:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:46:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-27 01:46:47,445 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 20 [2020-10-27 01:46:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:47,446 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-27 01:46:47,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:46:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-27 01:46:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:46:47,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:47,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:47,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:46:47,449 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:47,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:47,449 INFO L82 PathProgramCache]: Analyzing trace with hash 611090573, now seen corresponding path program 1 times [2020-10-27 01:46:47,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:47,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397764802] [2020-10-27 01:46:47,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:47,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:48,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:46:48,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:46:48,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-27 01:46:48,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:46:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:46:48,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:48,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:48,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:48,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:48,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:48,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:46:48,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:48,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:48,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:46:48,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397764802] [2020-10-27 01:46:48,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:48,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:46:48,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031625661] [2020-10-27 01:46:48,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:46:48,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:48,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:46:48,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:46:48,467 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 6 states. [2020-10-27 01:46:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:48,707 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-10-27 01:46:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:46:48,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 01:46:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:48,708 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:46:48,708 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:46:48,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:46:48,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-27 01:46:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:46:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2020-10-27 01:46:48,717 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 21 [2020-10-27 01:46:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:48,718 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2020-10-27 01:46:48,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:46:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2020-10-27 01:46:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:46:48,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:48,719 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:48,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:46:48,720 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:48,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:48,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1952623777, now seen corresponding path program 2 times [2020-10-27 01:46:48,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:48,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204284017] [2020-10-27 01:46:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:48,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:49,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:46:49,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:46:49,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-27 01:46:49,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:49,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:46:49,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:49,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:46:49,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:49,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:49,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:49,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:49,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:49,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:46:49,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:49,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:49,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:49,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:49,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204284017] [2020-10-27 01:46:49,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:49,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:46:49,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179904456] [2020-10-27 01:46:49,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:46:49,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:46:49,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:49,306 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand 7 states. [2020-10-27 01:46:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:49,626 INFO L93 Difference]: Finished difference Result 90 states and 139 transitions. [2020-10-27 01:46:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:46:49,626 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 01:46:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:49,628 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:46:49,628 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:46:49,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:46:49,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-10-27 01:46:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:46:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2020-10-27 01:46:49,641 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 21 [2020-10-27 01:46:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:49,641 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2020-10-27 01:46:49,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:46:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2020-10-27 01:46:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:46:49,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:49,643 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] [2020-10-27 01:46:49,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:46:49,643 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1194580027, now seen corresponding path program 1 times [2020-10-27 01:46:49,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:49,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853786770] [2020-10-27 01:46:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:49,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:49,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:46:49,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:49,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 01:46:49,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:49,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:46:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:46:49,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:46:49,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:49,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:49,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:49,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:49,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:49,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:49,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:49,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:49,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:49,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:49,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:46:49,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853786770] [2020-10-27 01:46:49,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:49,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:46:49,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275268262] [2020-10-27 01:46:49,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:46:49,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:49,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:46:49,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:46:49,832 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand 5 states. [2020-10-27 01:46:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:50,034 INFO L93 Difference]: Finished difference Result 103 states and 148 transitions. [2020-10-27 01:46:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:46:50,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 01:46:50,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:50,037 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:46:50,038 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:46:50,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:46:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 69. [2020-10-27 01:46:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:46:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2020-10-27 01:46:50,066 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 98 transitions. Word has length 22 [2020-10-27 01:46:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:50,068 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 98 transitions. [2020-10-27 01:46:50,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:46:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 98 transitions. [2020-10-27 01:46:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:46:50,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:50,070 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 01:46:50,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:46:50,070 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1075657231, now seen corresponding path program 1 times [2020-10-27 01:46:50,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:50,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631034280] [2020-10-27 01:46:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:50,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:50,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:50,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:50,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:46:50,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:50,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-27 01:46:50,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:50,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:46:50,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:46:50,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:46:50,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:50,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:50,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:50,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:50,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:50,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:50,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:50,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:50,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:46:50,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631034280] [2020-10-27 01:46:50,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:50,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:46:50,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590686558] [2020-10-27 01:46:50,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:46:50,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:50,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:46:50,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:46:50,309 INFO L87 Difference]: Start difference. First operand 69 states and 98 transitions. Second operand 5 states. [2020-10-27 01:46:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:50,493 INFO L93 Difference]: Finished difference Result 110 states and 159 transitions. [2020-10-27 01:46:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:46:50,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 01:46:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:50,495 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:46:50,495 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:46:50,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:46:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-10-27 01:46:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:46:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 131 transitions. [2020-10-27 01:46:50,522 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 131 transitions. Word has length 23 [2020-10-27 01:46:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:50,522 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 131 transitions. [2020-10-27 01:46:50,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:46:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 131 transitions. [2020-10-27 01:46:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:46:50,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:50,524 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:50,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:46:50,526 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:50,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1690443874, now seen corresponding path program 2 times [2020-10-27 01:46:50,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:50,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461709128] [2020-10-27 01:46:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:50,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:50,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:50,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:50,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:51,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:51,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:46:51,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:46:51,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-27 01:46:51,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:51,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:46:51,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:51,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:46:51,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:51,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:51,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:51,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:51,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:51,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:51,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:51,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:51,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:46:51,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461709128] [2020-10-27 01:46:51,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:51,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:46:51,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349768153] [2020-10-27 01:46:51,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:46:51,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:51,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:46:51,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:51,637 INFO L87 Difference]: Start difference. First operand 91 states and 131 transitions. Second operand 7 states. [2020-10-27 01:46:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:52,025 INFO L93 Difference]: Finished difference Result 131 states and 186 transitions. [2020-10-27 01:46:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:46:52,025 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-27 01:46:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:52,026 INFO L225 Difference]: With dead ends: 131 [2020-10-27 01:46:52,026 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:46:52,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:46:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-10-27 01:46:52,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:46:52,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 131 transitions. [2020-10-27 01:46:52,039 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 131 transitions. Word has length 23 [2020-10-27 01:46:52,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:52,039 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 131 transitions. [2020-10-27 01:46:52,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:46:52,040 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 131 transitions. [2020-10-27 01:46:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:46:52,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:52,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:52,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:46:52,041 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash -646946800, now seen corresponding path program 1 times [2020-10-27 01:46:52,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:52,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240632664] [2020-10-27 01:46:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:52,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:52,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:46:52,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:46:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-27 01:46:52,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:46:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:46:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:52,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:52,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:52,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:52,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:52,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:52,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:52,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:52,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:52,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:52,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:52,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240632664] [2020-10-27 01:46:52,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:52,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:46:52,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837444480] [2020-10-27 01:46:52,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:46:52,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:52,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:46:52,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:46:52,946 INFO L87 Difference]: Start difference. First operand 93 states and 131 transitions. Second operand 10 states. [2020-10-27 01:46:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:53,338 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2020-10-27 01:46:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:46:53,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-27 01:46:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:53,340 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:46:53,340 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:46:53,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:46:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:46:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-27 01:46:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:46:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 126 transitions. [2020-10-27 01:46:53,350 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 126 transitions. Word has length 23 [2020-10-27 01:46:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:53,350 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 126 transitions. [2020-10-27 01:46:53,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:46:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 126 transitions. [2020-10-27 01:46:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:46:53,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:53,352 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:53,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:46:53,352 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1482286974, now seen corresponding path program 2 times [2020-10-27 01:46:53,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:53,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794763867] [2020-10-27 01:46:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:53,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:53,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:53,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:53,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:53,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:54,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:54,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:46:54,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:46:54,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-27 01:46:54,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:46:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:54,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:46:54,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:54,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:54,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:54,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:54,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:54,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:54,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:54,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:54,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:54,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:54,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:54,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:54,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794763867] [2020-10-27 01:46:54,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:54,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:46:54,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651885877] [2020-10-27 01:46:54,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:46:54,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:54,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:46:54,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:46:54,410 INFO L87 Difference]: Start difference. First operand 89 states and 126 transitions. Second operand 8 states. [2020-10-27 01:46:54,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:54,849 INFO L93 Difference]: Finished difference Result 157 states and 238 transitions. [2020-10-27 01:46:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:46:54,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 01:46:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:54,851 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:46:54,851 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 01:46:54,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:46:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 01:46:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 107. [2020-10-27 01:46:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:46:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-10-27 01:46:54,863 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 23 [2020-10-27 01:46:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:54,863 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-10-27 01:46:54,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:46:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-10-27 01:46:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:46:54,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:54,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:54,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:46:54,865 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash -446666183, now seen corresponding path program 1 times [2020-10-27 01:46:54,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:54,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510256867] [2020-10-27 01:46:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:54,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:54,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:55,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:55,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:46:55,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:55,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-27 01:46:55,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:55,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:46:55,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:46:55,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:46:55,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:55,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:55,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:55,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:55,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:55,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:55,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:55,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:55,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:55,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:55,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:55,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:46:55,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510256867] [2020-10-27 01:46:55,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:55,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:46:55,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924770248] [2020-10-27 01:46:55,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:46:55,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:55,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:46:55,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:55,275 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 7 states. [2020-10-27 01:46:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:55,585 INFO L93 Difference]: Finished difference Result 159 states and 228 transitions. [2020-10-27 01:46:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:46:55,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 01:46:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:55,587 INFO L225 Difference]: With dead ends: 159 [2020-10-27 01:46:55,587 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:46:55,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:55,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:46:55,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2020-10-27 01:46:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:46:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 137 transitions. [2020-10-27 01:46:55,598 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 137 transitions. Word has length 24 [2020-10-27 01:46:55,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:55,598 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 137 transitions. [2020-10-27 01:46:55,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:46:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 137 transitions. [2020-10-27 01:46:55,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:46:55,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:55,600 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:55,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:46:55,600 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:55,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1262315270, now seen corresponding path program 3 times [2020-10-27 01:46:55,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:55,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882308970] [2020-10-27 01:46:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:55,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:55,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:55,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:55,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:55,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:56,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:56,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:46:56,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:46:56,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-27 01:46:56,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:56,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:46:56,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:56,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:46:56,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:56,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:56,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:56,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:56,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:56,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:56,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:46:56,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:56,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:56,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:56,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:56,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:46:56,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882308970] [2020-10-27 01:46:56,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:56,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:46:56,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359071416] [2020-10-27 01:46:56,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:46:56,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:56,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:46:56,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:56,972 INFO L87 Difference]: Start difference. First operand 94 states and 137 transitions. Second operand 9 states. [2020-10-27 01:46:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:57,623 INFO L93 Difference]: Finished difference Result 163 states and 254 transitions. [2020-10-27 01:46:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:46:57,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:46:57,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:57,625 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:46:57,625 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:46:57,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:46:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 91. [2020-10-27 01:46:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:46:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 131 transitions. [2020-10-27 01:46:57,644 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 131 transitions. Word has length 24 [2020-10-27 01:46:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:57,645 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 131 transitions. [2020-10-27 01:46:57,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:46:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 131 transitions. [2020-10-27 01:46:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:46:57,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:57,648 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:57,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:46:57,648 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash -69069733, now seen corresponding path program 3 times [2020-10-27 01:46:57,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:57,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491486350] [2020-10-27 01:46:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:57,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:57,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:57,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:57,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:58,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:58,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:58,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:58,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:46:58,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:46:58,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-27 01:46:58,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:46:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:46:58,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:58,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:58,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:58,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:58,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:58,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:58,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:58,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:58,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:58,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491486350] [2020-10-27 01:46:58,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:58,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:46:58,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600548052] [2020-10-27 01:46:58,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:46:58,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:58,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:46:58,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:58,832 INFO L87 Difference]: Start difference. First operand 91 states and 131 transitions. Second operand 9 states. [2020-10-27 01:46:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:59,429 INFO L93 Difference]: Finished difference Result 122 states and 180 transitions. [2020-10-27 01:46:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:46:59,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:46:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:59,430 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:46:59,430 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:46:59,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:46:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-10-27 01:46:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:46:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 152 transitions. [2020-10-27 01:46:59,440 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 152 transitions. Word has length 24 [2020-10-27 01:46:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:59,441 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 152 transitions. [2020-10-27 01:46:59,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:46:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 152 transitions. [2020-10-27 01:46:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:46:59,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:59,442 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:59,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:46:59,442 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:59,443 INFO L82 PathProgramCache]: Analyzing trace with hash -152215969, now seen corresponding path program 2 times [2020-10-27 01:46:59,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:59,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218624406] [2020-10-27 01:46:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:59,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:00,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:00,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:00,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:47:00,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:00,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-27 01:47:00,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:00,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:47:00,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:00,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:47:00,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:00,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:00,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:00,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:00,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:00,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:00,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:00,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:00,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:00,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:00,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:00,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 01:47:00,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218624406] [2020-10-27 01:47:00,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:00,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:47:00,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684003822] [2020-10-27 01:47:00,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:47:00,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:00,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:47:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:47:00,631 INFO L87 Difference]: Start difference. First operand 104 states and 152 transitions. Second operand 8 states. [2020-10-27 01:47:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:00,996 INFO L93 Difference]: Finished difference Result 136 states and 192 transitions. [2020-10-27 01:47:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:47:00,997 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 01:47:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:00,998 INFO L225 Difference]: With dead ends: 136 [2020-10-27 01:47:00,998 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:47:00,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:47:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2020-10-27 01:47:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:47:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 151 transitions. [2020-10-27 01:47:01,012 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 151 transitions. Word has length 25 [2020-10-27 01:47:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:01,013 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 151 transitions. [2020-10-27 01:47:01,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:47:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 151 transitions. [2020-10-27 01:47:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:47:01,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:01,014 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] [2020-10-27 01:47:01,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:47:01,014 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:01,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2145281168, now seen corresponding path program 3 times [2020-10-27 01:47:01,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:01,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269836311] [2020-10-27 01:47:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:01,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:01,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:01,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:01,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:01,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:01,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:47:01,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:47:01,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-10-27 01:47:01,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:01,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:47:01,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:01,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:47:01,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:01,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:01,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:02,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:02,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:02,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:02,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:47:02,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:02,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:02,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:02,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:02,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:47:02,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269836311] [2020-10-27 01:47:02,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:02,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:47:02,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738508644] [2020-10-27 01:47:02,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:47:02,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:02,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:47:02,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:47:02,014 INFO L87 Difference]: Start difference. First operand 104 states and 151 transitions. Second operand 7 states. [2020-10-27 01:47:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:02,366 INFO L93 Difference]: Finished difference Result 185 states and 274 transitions. [2020-10-27 01:47:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:47:02,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 01:47:02,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:02,370 INFO L225 Difference]: With dead ends: 185 [2020-10-27 01:47:02,370 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 01:47:02,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 01:47:02,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 124. [2020-10-27 01:47:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:47:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 179 transitions. [2020-10-27 01:47:02,398 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 179 transitions. Word has length 25 [2020-10-27 01:47:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:02,398 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 179 transitions. [2020-10-27 01:47:02,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:47:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 179 transitions. [2020-10-27 01:47:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:47:02,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:02,399 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:02,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:47:02,400 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:02,400 INFO L82 PathProgramCache]: Analyzing trace with hash 138357054, now seen corresponding path program 4 times [2020-10-27 01:47:02,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:02,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736254643] [2020-10-27 01:47:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:02,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:02,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:02,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:02,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:02,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:02,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:03,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:03,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:47:03,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:03,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-27 01:47:03,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:03,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:47:03,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:03,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:03,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:03,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:03,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:03,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:03,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:03,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:03,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:47:03,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:03,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:03,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:03,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:03,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 01:47:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:03,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736254643] [2020-10-27 01:47:03,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:03,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:47:03,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010242898] [2020-10-27 01:47:03,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:47:03,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:03,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:47:03,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:47:03,571 INFO L87 Difference]: Start difference. First operand 124 states and 179 transitions. Second operand 12 states. [2020-10-27 01:47:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:04,151 INFO L93 Difference]: Finished difference Result 165 states and 229 transitions. [2020-10-27 01:47:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:47:04,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-27 01:47:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:04,153 INFO L225 Difference]: With dead ends: 165 [2020-10-27 01:47:04,153 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:47:04,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:47:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:47:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 119. [2020-10-27 01:47:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:47:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 173 transitions. [2020-10-27 01:47:04,166 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 173 transitions. Word has length 25 [2020-10-27 01:47:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:04,166 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 173 transitions. [2020-10-27 01:47:04,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:47:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 173 transitions. [2020-10-27 01:47:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:47:04,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:04,167 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:04,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:47:04,167 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash -445638914, now seen corresponding path program 5 times [2020-10-27 01:47:04,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:04,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148730716] [2020-10-27 01:47:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:04,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:05,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:05,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:47:05,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:47:05,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-27 01:47:05,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:47:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:47:05,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:05,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:05,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:05,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:05,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:05,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:47:05,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:05,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:05,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:05,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:05,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:47:05,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148730716] [2020-10-27 01:47:05,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:05,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:47:05,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947121189] [2020-10-27 01:47:05,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:47:05,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:05,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:47:05,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:47:05,446 INFO L87 Difference]: Start difference. First operand 119 states and 173 transitions. Second operand 10 states. [2020-10-27 01:47:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:06,187 INFO L93 Difference]: Finished difference Result 231 states and 366 transitions. [2020-10-27 01:47:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:47:06,188 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 01:47:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:06,189 INFO L225 Difference]: With dead ends: 231 [2020-10-27 01:47:06,189 INFO L226 Difference]: Without dead ends: 202 [2020-10-27 01:47:06,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:47:06,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-27 01:47:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 138. [2020-10-27 01:47:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 01:47:06,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 199 transitions. [2020-10-27 01:47:06,206 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 199 transitions. Word has length 25 [2020-10-27 01:47:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:06,209 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 199 transitions. [2020-10-27 01:47:06,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:47:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 199 transitions. [2020-10-27 01:47:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:47:06,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:06,210 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:06,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:47:06,210 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:06,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:06,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1373889909, now seen corresponding path program 4 times [2020-10-27 01:47:06,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:06,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263628940] [2020-10-27 01:47:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:06,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:06,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:06,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:06,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:06,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:06,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:08,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:47:08,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:08,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2380 [2020-10-27 01:47:08,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:08,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:47:08,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:08,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:47:08,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:08,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:08,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:08,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:08,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:08,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:47:08,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:08,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:08,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:08,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:08,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:47:08,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263628940] [2020-10-27 01:47:08,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:08,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:47:08,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869983310] [2020-10-27 01:47:08,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:47:08,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:08,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:47:08,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:47:08,747 INFO L87 Difference]: Start difference. First operand 138 states and 199 transitions. Second operand 9 states. [2020-10-27 01:47:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:09,665 INFO L93 Difference]: Finished difference Result 222 states and 330 transitions. [2020-10-27 01:47:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:47:09,666 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:47:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:09,668 INFO L225 Difference]: With dead ends: 222 [2020-10-27 01:47:09,668 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 01:47:09,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:47:09,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 01:47:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 166. [2020-10-27 01:47:09,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 01:47:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 231 transitions. [2020-10-27 01:47:09,689 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 231 transitions. Word has length 26 [2020-10-27 01:47:09,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:09,690 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 231 transitions. [2020-10-27 01:47:09,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:47:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 231 transitions. [2020-10-27 01:47:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:47:09,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:09,691 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:09,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:47:09,691 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:09,692 INFO L82 PathProgramCache]: Analyzing trace with hash -898475654, now seen corresponding path program 6 times [2020-10-27 01:47:09,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:09,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555499232] [2020-10-27 01:47:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:09,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:10,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:10,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:47:10,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:47:10,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-27 01:47:10,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:10,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:10,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:10,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:47:10,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:11,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:11,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:11,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:11,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:11,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:47:11,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:11,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:47:11,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555499232] [2020-10-27 01:47:11,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:11,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:47:11,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252661140] [2020-10-27 01:47:11,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:47:11,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:11,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:47:11,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:11,183 INFO L87 Difference]: Start difference. First operand 166 states and 231 transitions. Second operand 11 states. [2020-10-27 01:47:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:12,186 INFO L93 Difference]: Finished difference Result 266 states and 402 transitions. [2020-10-27 01:47:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:47:12,187 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 01:47:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:12,189 INFO L225 Difference]: With dead ends: 266 [2020-10-27 01:47:12,189 INFO L226 Difference]: Without dead ends: 235 [2020-10-27 01:47:12,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:47:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-27 01:47:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-27 01:47:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 01:47:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 225 transitions. [2020-10-27 01:47:12,206 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 225 transitions. Word has length 26 [2020-10-27 01:47:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:12,206 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 225 transitions. [2020-10-27 01:47:12,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:47:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 225 transitions. [2020-10-27 01:47:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:47:12,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:12,207 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:12,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:47:12,208 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 294769883, now seen corresponding path program 4 times [2020-10-27 01:47:12,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:12,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377169922] [2020-10-27 01:47:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:12,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:12,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:47:12,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:47:12,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-27 01:47:12,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:12,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:47:12,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:12,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:12,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:13,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:13,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:13,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:13,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:13,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:13,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:13,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:13,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:13,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:13,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:13,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:47:13,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377169922] [2020-10-27 01:47:13,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:13,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:47:13,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912674238] [2020-10-27 01:47:13,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:47:13,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:47:13,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:47:13,139 INFO L87 Difference]: Start difference. First operand 163 states and 225 transitions. Second operand 12 states. [2020-10-27 01:47:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:14,223 INFO L93 Difference]: Finished difference Result 287 states and 439 transitions. [2020-10-27 01:47:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:47:14,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-27 01:47:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:14,225 INFO L225 Difference]: With dead ends: 287 [2020-10-27 01:47:14,225 INFO L226 Difference]: Without dead ends: 256 [2020-10-27 01:47:14,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:47:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-27 01:47:14,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 179. [2020-10-27 01:47:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 01:47:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 248 transitions. [2020-10-27 01:47:14,249 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 248 transitions. Word has length 26 [2020-10-27 01:47:14,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:14,249 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 248 transitions. [2020-10-27 01:47:14,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:47:14,250 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 248 transitions. [2020-10-27 01:47:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:47:14,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:14,250 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:14,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:47:14,251 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:14,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1531292913, now seen corresponding path program 3 times [2020-10-27 01:47:14,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:14,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290025346] [2020-10-27 01:47:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:14,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:15,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:47:15,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:15,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1579 [2020-10-27 01:47:15,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:47:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:47:15,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:15,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:15,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:15,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:15,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:15,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:15,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:15,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:15,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:15,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:15,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 01:47:15,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290025346] [2020-10-27 01:47:15,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:15,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:47:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890443764] [2020-10-27 01:47:15,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:47:15,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:47:15,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:47:15,984 INFO L87 Difference]: Start difference. First operand 179 states and 248 transitions. Second operand 9 states. [2020-10-27 01:47:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:16,642 INFO L93 Difference]: Finished difference Result 222 states and 301 transitions. [2020-10-27 01:47:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:47:16,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 01:47:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:16,645 INFO L225 Difference]: With dead ends: 222 [2020-10-27 01:47:16,645 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 01:47:16,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 01:47:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 179. [2020-10-27 01:47:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 01:47:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 247 transitions. [2020-10-27 01:47:16,682 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 247 transitions. Word has length 27 [2020-10-27 01:47:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:16,682 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 247 transitions. [2020-10-27 01:47:16,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:47:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 247 transitions. [2020-10-27 01:47:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:47:16,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:16,687 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:16,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:47:16,687 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash -858267169, now seen corresponding path program 5 times [2020-10-27 01:47:16,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:16,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454452951] [2020-10-27 01:47:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:16,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:16,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:16,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:16,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:17,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:17,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:17,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:18,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:18,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:47:18,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:47:18,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1413 [2020-10-27 01:47:18,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:18,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:47:18,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:18,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:47:18,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:18,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:18,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:18,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:18,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:18,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:18,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:18,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:18,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:18,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:18,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:18,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:47:18,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454452951] [2020-10-27 01:47:18,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:18,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:47:18,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728853718] [2020-10-27 01:47:18,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:47:18,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:18,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:47:18,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:47:18,343 INFO L87 Difference]: Start difference. First operand 179 states and 247 transitions. Second operand 12 states. [2020-10-27 01:47:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:19,603 INFO L93 Difference]: Finished difference Result 218 states and 307 transitions. [2020-10-27 01:47:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:47:19,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-27 01:47:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:19,606 INFO L225 Difference]: With dead ends: 218 [2020-10-27 01:47:19,607 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 01:47:19,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:47:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 01:47:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-10-27 01:47:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 01:47:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 276 transitions. [2020-10-27 01:47:19,623 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 276 transitions. Word has length 27 [2020-10-27 01:47:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:19,624 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 276 transitions. [2020-10-27 01:47:19,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:47:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 276 transitions. [2020-10-27 01:47:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:19,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:19,625 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] [2020-10-27 01:47:19,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:47:19,625 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:19,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:19,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1171837851, now seen corresponding path program 5 times [2020-10-27 01:47:19,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:19,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670986231] [2020-10-27 01:47:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:19,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:20,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:20,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:20,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:47:20,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1207 [2020-10-27 01:47:20,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:20,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:47:20,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:20,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:20,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:20,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:20,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:20,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:20,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:20,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:20,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:20,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:20,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:47:20,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670986231] [2020-10-27 01:47:20,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:20,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:47:20,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993544565] [2020-10-27 01:47:20,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:47:20,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:20,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:47:20,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:47:20,974 INFO L87 Difference]: Start difference. First operand 198 states and 276 transitions. Second operand 7 states. [2020-10-27 01:47:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:21,822 INFO L93 Difference]: Finished difference Result 357 states and 500 transitions. [2020-10-27 01:47:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:47:21,823 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-27 01:47:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:21,825 INFO L225 Difference]: With dead ends: 357 [2020-10-27 01:47:21,825 INFO L226 Difference]: Without dead ends: 341 [2020-10-27 01:47:21,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-27 01:47:21,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 218. [2020-10-27 01:47:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-27 01:47:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 306 transitions. [2020-10-27 01:47:21,847 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 306 transitions. Word has length 28 [2020-10-27 01:47:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:21,847 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 306 transitions. [2020-10-27 01:47:21,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:47:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 306 transitions. [2020-10-27 01:47:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:21,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:21,849 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:21,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:47:21,849 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash 859044346, now seen corresponding path program 7 times [2020-10-27 01:47:21,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:21,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235468827] [2020-10-27 01:47:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:21,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:21,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:22,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:22,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:23,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:23,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:23,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:47:23,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1642 [2020-10-27 01:47:23,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:23,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:47:23,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:23,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:23,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:23,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:23,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:23,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:23,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:23,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:23,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:23,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:23,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:23,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:23,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:23,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:47:23,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235468827] [2020-10-27 01:47:23,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:23,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:47:23,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216009221] [2020-10-27 01:47:23,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:47:23,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:23,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:47:23,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:23,730 INFO L87 Difference]: Start difference. First operand 218 states and 306 transitions. Second operand 13 states. [2020-10-27 01:47:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:25,165 INFO L93 Difference]: Finished difference Result 379 states and 590 transitions. [2020-10-27 01:47:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:47:25,168 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-27 01:47:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:25,170 INFO L225 Difference]: With dead ends: 379 [2020-10-27 01:47:25,170 INFO L226 Difference]: Without dead ends: 349 [2020-10-27 01:47:25,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:47:25,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-27 01:47:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 239. [2020-10-27 01:47:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 01:47:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 336 transitions. [2020-10-27 01:47:25,200 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 336 transitions. Word has length 28 [2020-10-27 01:47:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:25,201 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 336 transitions. [2020-10-27 01:47:25,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:47:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 336 transitions. [2020-10-27 01:47:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:25,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:25,202 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 01:47:25,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:47:25,202 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:25,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:25,203 INFO L82 PathProgramCache]: Analyzing trace with hash 370649775, now seen corresponding path program 4 times [2020-10-27 01:47:25,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:25,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323862334] [2020-10-27 01:47:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:25,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:25,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:25,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:25,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:26,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:26,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:26,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:47:26,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-27 01:47:26,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:47:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:47:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:26,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:26,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:26,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:26,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:26,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:26,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:26,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:26,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:26,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 01:47:26,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323862334] [2020-10-27 01:47:26,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:26,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:47:26,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411177572] [2020-10-27 01:47:26,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:47:26,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:26,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:47:26,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:47:26,287 INFO L87 Difference]: Start difference. First operand 239 states and 336 transitions. Second operand 8 states. [2020-10-27 01:47:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:27,132 INFO L93 Difference]: Finished difference Result 365 states and 520 transitions. [2020-10-27 01:47:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:47:27,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-27 01:47:27,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:27,136 INFO L225 Difference]: With dead ends: 365 [2020-10-27 01:47:27,136 INFO L226 Difference]: Without dead ends: 345 [2020-10-27 01:47:27,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-27 01:47:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 243. [2020-10-27 01:47:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-27 01:47:27,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 340 transitions. [2020-10-27 01:47:27,162 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 340 transitions. Word has length 29 [2020-10-27 01:47:27,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:27,162 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 340 transitions. [2020-10-27 01:47:27,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:47:27,163 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 340 transitions. [2020-10-27 01:47:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:27,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:27,164 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:27,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:47:27,164 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash 866861182, now seen corresponding path program 6 times [2020-10-27 01:47:27,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:27,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560209301] [2020-10-27 01:47:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:27,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:31,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:31,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:31,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:31,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4501 [2020-10-27 01:47:31,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:31,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:31,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:31,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:47:31,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:31,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:31,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:31,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:31,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:31,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:31,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:31,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:31,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:31,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:31,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:31,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:47:31,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560209301] [2020-10-27 01:47:31,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:31,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:47:31,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423674083] [2020-10-27 01:47:31,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:47:31,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:31,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:47:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:31,860 INFO L87 Difference]: Start difference. First operand 243 states and 340 transitions. Second operand 11 states. [2020-10-27 01:47:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:33,428 INFO L93 Difference]: Finished difference Result 365 states and 531 transitions. [2020-10-27 01:47:33,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:47:33,430 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:47:33,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:33,432 INFO L225 Difference]: With dead ends: 365 [2020-10-27 01:47:33,432 INFO L226 Difference]: Without dead ends: 306 [2020-10-27 01:47:33,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:47:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-27 01:47:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 265. [2020-10-27 01:47:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-27 01:47:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 367 transitions. [2020-10-27 01:47:33,455 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 367 transitions. Word has length 29 [2020-10-27 01:47:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:33,455 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 367 transitions. [2020-10-27 01:47:33,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:47:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 367 transitions. [2020-10-27 01:47:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:33,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:33,457 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:33,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:47:33,457 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:33,457 INFO L82 PathProgramCache]: Analyzing trace with hash -147012769, now seen corresponding path program 5 times [2020-10-27 01:47:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:33,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052693801] [2020-10-27 01:47:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:33,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:33,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:33,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:33,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:33,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:34,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:34,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:34,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:34,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:34,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-27 01:47:34,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:34,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:47:34,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:34,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:34,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:35,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:35,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:35,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:35,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:35,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:35,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:35,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:35,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:47:35,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052693801] [2020-10-27 01:47:35,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:35,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:47:35,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651124007] [2020-10-27 01:47:35,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:47:35,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:35,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:47:35,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:35,163 INFO L87 Difference]: Start difference. First operand 265 states and 367 transitions. Second operand 13 states. [2020-10-27 01:47:36,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:36,077 INFO L93 Difference]: Finished difference Result 322 states and 436 transitions. [2020-10-27 01:47:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:47:36,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-27 01:47:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:36,080 INFO L225 Difference]: With dead ends: 322 [2020-10-27 01:47:36,080 INFO L226 Difference]: Without dead ends: 304 [2020-10-27 01:47:36,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:47:36,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-27 01:47:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 265. [2020-10-27 01:47:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-27 01:47:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 366 transitions. [2020-10-27 01:47:36,102 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 366 transitions. Word has length 29 [2020-10-27 01:47:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:36,103 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 366 transitions. [2020-10-27 01:47:36,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:47:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 366 transitions. [2020-10-27 01:47:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:36,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:36,104 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:36,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:47:36,104 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:36,105 INFO L82 PathProgramCache]: Analyzing trace with hash 55405182, now seen corresponding path program 8 times [2020-10-27 01:47:36,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:36,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579238562] [2020-10-27 01:47:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:36,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:36,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:36,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:36,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:36,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:36,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:37,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:37,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:37,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:37,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1067 [2020-10-27 01:47:37,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:37,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:47:37,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:47:37,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:37,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:37,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:37,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:37,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:37,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:37,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:37,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:37,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:37,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:37,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:37,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:37,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579238562] [2020-10-27 01:47:37,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:37,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:47:37,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512936442] [2020-10-27 01:47:37,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:47:37,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:37,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:47:37,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:37,494 INFO L87 Difference]: Start difference. First operand 265 states and 366 transitions. Second operand 16 states. [2020-10-27 01:47:38,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:38,637 INFO L93 Difference]: Finished difference Result 334 states and 448 transitions. [2020-10-27 01:47:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:47:38,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-10-27 01:47:38,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:38,641 INFO L225 Difference]: With dead ends: 334 [2020-10-27 01:47:38,641 INFO L226 Difference]: Without dead ends: 318 [2020-10-27 01:47:38,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:47:38,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-27 01:47:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 265. [2020-10-27 01:47:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-27 01:47:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 365 transitions. [2020-10-27 01:47:38,671 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 365 transitions. Word has length 29 [2020-10-27 01:47:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:38,671 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 365 transitions. [2020-10-27 01:47:38,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:47:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 365 transitions. [2020-10-27 01:47:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:38,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:38,672 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:38,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:47:38,673 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 891999742, now seen corresponding path program 9 times [2020-10-27 01:47:38,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:38,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289204097] [2020-10-27 01:47:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:38,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:38,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:38,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:38,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:38,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:39,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:39,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:39,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:47:39,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1070 [2020-10-27 01:47:39,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:39,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:47:39,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:39,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:47:39,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:39,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:39,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:39,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:39,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:39,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:39,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:39,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:39,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:39,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:39,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:39,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:47:39,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289204097] [2020-10-27 01:47:39,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:39,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:47:39,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655136176] [2020-10-27 01:47:39,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:47:39,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:39,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:47:39,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:47:39,990 INFO L87 Difference]: Start difference. First operand 265 states and 365 transitions. Second operand 14 states. [2020-10-27 01:47:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:41,669 INFO L93 Difference]: Finished difference Result 444 states and 679 transitions. [2020-10-27 01:47:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:47:41,670 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-27 01:47:41,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:41,672 INFO L225 Difference]: With dead ends: 444 [2020-10-27 01:47:41,672 INFO L226 Difference]: Without dead ends: 412 [2020-10-27 01:47:41,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:47:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-27 01:47:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 286. [2020-10-27 01:47:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-27 01:47:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 396 transitions. [2020-10-27 01:47:41,695 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 396 transitions. Word has length 29 [2020-10-27 01:47:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:41,696 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 396 transitions. [2020-10-27 01:47:41,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:47:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 396 transitions. [2020-10-27 01:47:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:47:41,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:41,697 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:41,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:47:41,697 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:41,698 INFO L82 PathProgramCache]: Analyzing trace with hash 352910074, now seen corresponding path program 2 times [2020-10-27 01:47:41,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:41,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114689512] [2020-10-27 01:47:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:41,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:41,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:41,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:41,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:47:41,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:47:41,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 01:47:41,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:41,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:47:41,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:47:41,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:47:41,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:42,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:42,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:42,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:42,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:42,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:42,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:42,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:42,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:42,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:42,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:42,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:47:42,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114689512] [2020-10-27 01:47:42,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:42,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:47:42,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238381023] [2020-10-27 01:47:42,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:47:42,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:42,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:47:42,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:47:42,085 INFO L87 Difference]: Start difference. First operand 286 states and 396 transitions. Second operand 8 states. [2020-10-27 01:47:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:42,579 INFO L93 Difference]: Finished difference Result 433 states and 602 transitions. [2020-10-27 01:47:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:47:42,581 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 01:47:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:42,583 INFO L225 Difference]: With dead ends: 433 [2020-10-27 01:47:42,583 INFO L226 Difference]: Without dead ends: 334 [2020-10-27 01:47:42,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-27 01:47:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 274. [2020-10-27 01:47:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-27 01:47:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 378 transitions. [2020-10-27 01:47:42,610 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 378 transitions. Word has length 30 [2020-10-27 01:47:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:42,610 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 378 transitions. [2020-10-27 01:47:42,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:47:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 378 transitions. [2020-10-27 01:47:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:47:42,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:42,612 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:42,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:47:42,613 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:42,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1913617018, now seen corresponding path program 10 times [2020-10-27 01:47:42,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:42,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845014080] [2020-10-27 01:47:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:42,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:42,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:42,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:42,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:43,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:44,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:44,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:47:44,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:47:44,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2072 [2020-10-27 01:47:44,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:47:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:44,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:45,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:45,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:45,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:45,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:45,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:47:45,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:45,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:45,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:45,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:45,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:47:45,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845014080] [2020-10-27 01:47:45,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:45,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:47:45,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589419605] [2020-10-27 01:47:45,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:47:45,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:45,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:47:45,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:47:45,044 INFO L87 Difference]: Start difference. First operand 274 states and 378 transitions. Second operand 15 states. [2020-10-27 01:47:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:46,868 INFO L93 Difference]: Finished difference Result 457 states and 703 transitions. [2020-10-27 01:47:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:47:46,869 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-27 01:47:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:46,871 INFO L225 Difference]: With dead ends: 457 [2020-10-27 01:47:46,871 INFO L226 Difference]: Without dead ends: 418 [2020-10-27 01:47:46,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:47:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-10-27 01:47:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 269. [2020-10-27 01:47:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-27 01:47:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 369 transitions. [2020-10-27 01:47:46,900 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 369 transitions. Word has length 30 [2020-10-27 01:47:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:46,900 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 369 transitions. [2020-10-27 01:47:46,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:47:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 369 transitions. [2020-10-27 01:47:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:47:46,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:46,902 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:46,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:47:46,902 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1188104741, now seen corresponding path program 6 times [2020-10-27 01:47:46,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:46,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282235832] [2020-10-27 01:47:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:46,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:46,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:47,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:47,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:47,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:47,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:47,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:47,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:47:47,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:47:47,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-10-27 01:47:47,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:47,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:47:47,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:47,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:47:47,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:48,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:48,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:48,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:48,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:48,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:48,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:48,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:48,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:47:48,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282235832] [2020-10-27 01:47:48,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:48,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:47:48,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021894127] [2020-10-27 01:47:48,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:47:48,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:48,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:47:48,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:48,224 INFO L87 Difference]: Start difference. First operand 269 states and 369 transitions. Second operand 16 states. [2020-10-27 01:47:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:50,406 INFO L93 Difference]: Finished difference Result 482 states and 748 transitions. [2020-10-27 01:47:50,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:47:50,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-27 01:47:50,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:50,410 INFO L225 Difference]: With dead ends: 482 [2020-10-27 01:47:50,410 INFO L226 Difference]: Without dead ends: 443 [2020-10-27 01:47:50,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:47:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-27 01:47:50,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 288. [2020-10-27 01:47:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-27 01:47:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 396 transitions. [2020-10-27 01:47:50,440 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 396 transitions. Word has length 30 [2020-10-27 01:47:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:50,440 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 396 transitions. [2020-10-27 01:47:50,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:47:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 396 transitions. [2020-10-27 01:47:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:47:50,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:50,441 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] [2020-10-27 01:47:50,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:47:50,441 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:50,442 INFO L82 PathProgramCache]: Analyzing trace with hash 610452368, now seen corresponding path program 7 times [2020-10-27 01:47:50,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:50,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697152076] [2020-10-27 01:47:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:50,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:50,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:50,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:50,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:51,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:51,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:47:51,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:47:51,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1442 [2020-10-27 01:47:51,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:51,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:52,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:52,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:52,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:52,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:52,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:52,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:52,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:52,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:52,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:52,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:52,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 01:47:52,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697152076] [2020-10-27 01:47:52,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:52,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:47:52,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139508980] [2020-10-27 01:47:52,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:47:52,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:52,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:47:52,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:47:52,018 INFO L87 Difference]: Start difference. First operand 288 states and 396 transitions. Second operand 8 states. [2020-10-27 01:47:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:58,204 INFO L93 Difference]: Finished difference Result 573 states and 779 transitions. [2020-10-27 01:47:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:47:58,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-27 01:47:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:58,208 INFO L225 Difference]: With dead ends: 573 [2020-10-27 01:47:58,208 INFO L226 Difference]: Without dead ends: 555 [2020-10-27 01:47:58,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:47:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-27 01:47:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 313. [2020-10-27 01:47:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-27 01:47:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 433 transitions. [2020-10-27 01:47:58,240 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 433 transitions. Word has length 31 [2020-10-27 01:47:58,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:58,240 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 433 transitions. [2020-10-27 01:47:58,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:47:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 433 transitions. [2020-10-27 01:47:58,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:47:58,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:58,241 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:58,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:47:58,241 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1388407823, now seen corresponding path program 6 times [2020-10-27 01:47:58,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:58,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976289324] [2020-10-27 01:47:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:58,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:58,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:58,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:58,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:58,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:59,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:00,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:00,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:48:00,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:48:00,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-10-27 01:48:00,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:00,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:48:00,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:00,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:48:00,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:00,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:00,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:00,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:00,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:00,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:00,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:00,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:00,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:00,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:00,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:00,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:48:00,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976289324] [2020-10-27 01:48:00,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:00,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:48:00,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753342732] [2020-10-27 01:48:00,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:48:00,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:00,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:48:00,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:48:00,426 INFO L87 Difference]: Start difference. First operand 313 states and 433 transitions. Second operand 15 states. [2020-10-27 01:48:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:01,543 INFO L93 Difference]: Finished difference Result 388 states and 524 transitions. [2020-10-27 01:48:01,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:48:01,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-27 01:48:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:01,546 INFO L225 Difference]: With dead ends: 388 [2020-10-27 01:48:01,546 INFO L226 Difference]: Without dead ends: 369 [2020-10-27 01:48:01,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:48:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-27 01:48:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 313. [2020-10-27 01:48:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-27 01:48:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 432 transitions. [2020-10-27 01:48:01,572 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 432 transitions. Word has length 31 [2020-10-27 01:48:01,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:01,573 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 432 transitions. [2020-10-27 01:48:01,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:48:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 432 transitions. [2020-10-27 01:48:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:48:01,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:01,574 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:01,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:48:01,574 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:01,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash 417259743, now seen corresponding path program 7 times [2020-10-27 01:48:01,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:01,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998959944] [2020-10-27 01:48:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:01,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:01,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:01,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:01,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:01,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:01,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:02,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:02,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:02,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:48:02,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:48:02,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-27 01:48:02,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:02,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:48:02,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:02,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:48:02,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:02,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:02,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:02,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:02,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:02,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:02,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:02,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:02,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:02,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:02,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:02,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:48:02,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998959944] [2020-10-27 01:48:02,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:02,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:48:02,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364830116] [2020-10-27 01:48:02,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:48:02,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:02,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:48:02,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:48:02,919 INFO L87 Difference]: Start difference. First operand 313 states and 432 transitions. Second operand 17 states. [2020-10-27 01:48:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:05,531 INFO L93 Difference]: Finished difference Result 555 states and 867 transitions. [2020-10-27 01:48:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:48:05,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-27 01:48:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:05,534 INFO L225 Difference]: With dead ends: 555 [2020-10-27 01:48:05,535 INFO L226 Difference]: Without dead ends: 515 [2020-10-27 01:48:05,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:48:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-27 01:48:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 334. [2020-10-27 01:48:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-27 01:48:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 462 transitions. [2020-10-27 01:48:05,565 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 462 transitions. Word has length 31 [2020-10-27 01:48:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:05,565 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 462 transitions. [2020-10-27 01:48:05,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:48:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 462 transitions. [2020-10-27 01:48:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:48:05,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:05,566 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:05,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:48:05,566 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:05,567 INFO L82 PathProgramCache]: Analyzing trace with hash 795021178, now seen corresponding path program 7 times [2020-10-27 01:48:05,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:05,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211336076] [2020-10-27 01:48:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:05,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:05,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:05,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:05,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:05,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:06,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:07,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:07,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:48:07,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:48:07,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2022 [2020-10-27 01:48:07,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:07,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:48:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:07,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:48:07,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:07,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:07,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:07,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:07,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:07,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:07,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:07,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:07,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:07,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:07,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:07,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:48:07,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211336076] [2020-10-27 01:48:07,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:07,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:48:07,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470893896] [2020-10-27 01:48:07,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:48:07,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:07,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:48:07,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:48:07,781 INFO L87 Difference]: Start difference. First operand 334 states and 462 transitions. Second operand 11 states. [2020-10-27 01:48:08,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:08,638 INFO L93 Difference]: Finished difference Result 396 states and 539 transitions. [2020-10-27 01:48:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:48:08,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:48:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:08,641 INFO L225 Difference]: With dead ends: 396 [2020-10-27 01:48:08,641 INFO L226 Difference]: Without dead ends: 375 [2020-10-27 01:48:08,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:48:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-27 01:48:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 334. [2020-10-27 01:48:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-27 01:48:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 461 transitions. [2020-10-27 01:48:08,672 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 461 transitions. Word has length 32 [2020-10-27 01:48:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:08,672 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 461 transitions. [2020-10-27 01:48:08,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:48:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 461 transitions. [2020-10-27 01:48:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:48:08,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:08,674 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 01:48:08,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:48:08,674 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:08,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:08,674 INFO L82 PathProgramCache]: Analyzing trace with hash 147568986, now seen corresponding path program 8 times [2020-10-27 01:48:08,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:08,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221325605] [2020-10-27 01:48:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:08,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:08,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:08,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:09,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:10,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:10,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:48:10,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:48:10,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1583 [2020-10-27 01:48:10,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:10,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:48:10,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:48:10,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:48:10,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:10,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:10,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:10,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:10,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:10,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:10,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:10,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:10,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:10,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 01:48:10,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221325605] [2020-10-27 01:48:10,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:10,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:48:10,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805828726] [2020-10-27 01:48:10,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:48:10,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:48:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:48:10,396 INFO L87 Difference]: Start difference. First operand 334 states and 461 transitions. Second operand 8 states. [2020-10-27 01:48:12,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:12,019 INFO L93 Difference]: Finished difference Result 626 states and 842 transitions. [2020-10-27 01:48:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:48:12,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-27 01:48:12,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:12,024 INFO L225 Difference]: With dead ends: 626 [2020-10-27 01:48:12,025 INFO L226 Difference]: Without dead ends: 606 [2020-10-27 01:48:12,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:48:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-27 01:48:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 335. [2020-10-27 01:48:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-27 01:48:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2020-10-27 01:48:12,051 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 462 transitions. Word has length 32 [2020-10-27 01:48:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:12,051 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 462 transitions. [2020-10-27 01:48:12,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:48:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 462 transitions. [2020-10-27 01:48:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:48:12,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:12,052 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:12,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:48:12,053 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:12,053 INFO L82 PathProgramCache]: Analyzing trace with hash 501943851, now seen corresponding path program 8 times [2020-10-27 01:48:12,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:12,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971553067] [2020-10-27 01:48:12,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:12,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:17,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:17,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:48:17,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:48:17,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:48:17,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:17,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:48:17,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:17,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:48:17,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:17,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:17,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:17,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:17,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:17,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:17,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:17,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:17,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:17,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:17,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:17,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 01:48:17,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971553067] [2020-10-27 01:48:17,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:17,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:48:17,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754203237] [2020-10-27 01:48:17,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:48:17,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:48:17,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:48:17,317 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 13 states. [2020-10-27 01:48:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:19,745 INFO L93 Difference]: Finished difference Result 508 states and 743 transitions. [2020-10-27 01:48:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:48:19,746 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 01:48:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:19,747 INFO L225 Difference]: With dead ends: 508 [2020-10-27 01:48:19,748 INFO L226 Difference]: Without dead ends: 434 [2020-10-27 01:48:19,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:48:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-27 01:48:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 369. [2020-10-27 01:48:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-27 01:48:19,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 505 transitions. [2020-10-27 01:48:19,779 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 505 transitions. Word has length 32 [2020-10-27 01:48:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:19,779 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 505 transitions. [2020-10-27 01:48:19,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:48:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 505 transitions. [2020-10-27 01:48:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:48:19,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:19,780 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:19,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:48:19,781 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:19,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:19,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1356048805, now seen corresponding path program 8 times [2020-10-27 01:48:19,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:19,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660856869] [2020-10-27 01:48:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:20,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:20,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:21,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:21,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:48:21,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:48:21,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-27 01:48:21,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:21,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:48:21,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:21,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:48:21,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:21,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:21,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:21,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:21,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:21,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:21,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:21,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:21,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:21,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:21,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:21,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:48:21,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660856869] [2020-10-27 01:48:21,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:21,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:48:21,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775051976] [2020-10-27 01:48:21,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:48:21,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:21,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:48:21,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:48:21,441 INFO L87 Difference]: Start difference. First operand 369 states and 505 transitions. Second operand 18 states. [2020-10-27 01:48:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:24,364 INFO L93 Difference]: Finished difference Result 628 states and 971 transitions. [2020-10-27 01:48:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:48:24,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-10-27 01:48:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:24,368 INFO L225 Difference]: With dead ends: 628 [2020-10-27 01:48:24,369 INFO L226 Difference]: Without dead ends: 588 [2020-10-27 01:48:24,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:48:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2020-10-27 01:48:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 392. [2020-10-27 01:48:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-27 01:48:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 538 transitions. [2020-10-27 01:48:24,403 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 538 transitions. Word has length 32 [2020-10-27 01:48:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:24,403 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 538 transitions. [2020-10-27 01:48:24,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:48:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 538 transitions. [2020-10-27 01:48:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:48:24,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:24,405 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:24,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:48:24,405 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:24,406 INFO L82 PathProgramCache]: Analyzing trace with hash 998451295, now seen corresponding path program 9 times [2020-10-27 01:48:24,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:24,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664509922] [2020-10-27 01:48:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:24,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:24,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:24,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:24,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:24,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:26,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:26,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:48:26,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:48:26,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1933 [2020-10-27 01:48:26,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:26,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:48:26,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:26,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:48:26,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:26,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:26,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:26,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:26,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:26,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:26,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:26,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:26,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:26,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:26,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:48:26,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664509922] [2020-10-27 01:48:26,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:26,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:48:26,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251050100] [2020-10-27 01:48:26,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:48:26,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:48:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:48:26,709 INFO L87 Difference]: Start difference. First operand 392 states and 538 transitions. Second operand 17 states. [2020-10-27 01:48:28,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:28,203 INFO L93 Difference]: Finished difference Result 476 states and 640 transitions. [2020-10-27 01:48:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:48:28,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-27 01:48:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:28,207 INFO L225 Difference]: With dead ends: 476 [2020-10-27 01:48:28,207 INFO L226 Difference]: Without dead ends: 456 [2020-10-27 01:48:28,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:48:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-27 01:48:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 392. [2020-10-27 01:48:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-27 01:48:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 537 transitions. [2020-10-27 01:48:28,238 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 537 transitions. Word has length 33 [2020-10-27 01:48:28,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:28,238 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 537 transitions. [2020-10-27 01:48:28,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:48:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 537 transitions. [2020-10-27 01:48:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:48:28,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:28,240 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:28,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:48:28,240 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash -494038945, now seen corresponding path program 9 times [2020-10-27 01:48:28,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:28,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488543831] [2020-10-27 01:48:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:28,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:28,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:28,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:28,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:28,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:28,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:29,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:29,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:29,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:48:29,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:48:29,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-27 01:48:29,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:48:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:48:29,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:30,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:30,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:30,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:30,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:30,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:30,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:30,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:30,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:30,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:30,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:30,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:30,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488543831] [2020-10-27 01:48:30,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:30,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:48:30,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799846982] [2020-10-27 01:48:30,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:48:30,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:30,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:48:30,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:48:30,100 INFO L87 Difference]: Start difference. First operand 392 states and 537 transitions. Second operand 19 states. [2020-10-27 01:48:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:33,333 INFO L93 Difference]: Finished difference Result 709 states and 1110 transitions. [2020-10-27 01:48:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:48:33,334 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2020-10-27 01:48:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:33,337 INFO L225 Difference]: With dead ends: 709 [2020-10-27 01:48:33,337 INFO L226 Difference]: Without dead ends: 671 [2020-10-27 01:48:33,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:48:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2020-10-27 01:48:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 448. [2020-10-27 01:48:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-27 01:48:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 618 transitions. [2020-10-27 01:48:33,373 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 618 transitions. Word has length 33 [2020-10-27 01:48:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:33,374 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 618 transitions. [2020-10-27 01:48:33,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:48:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 618 transitions. [2020-10-27 01:48:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:48:33,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:33,375 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:33,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:48:33,375 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash -4335924, now seen corresponding path program 10 times [2020-10-27 01:48:33,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:33,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558963] [2020-10-27 01:48:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:33,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:36,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:36,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:48:36,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:48:36,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3319 [2020-10-27 01:48:36,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:36,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:48:36,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:36,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:48:36,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:36,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:36,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:36,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:36,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:36,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:36,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:36,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:36,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:48:36,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558963] [2020-10-27 01:48:36,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:36,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:48:36,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262308283] [2020-10-27 01:48:36,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:48:36,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:36,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:48:36,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:48:36,996 INFO L87 Difference]: Start difference. First operand 448 states and 618 transitions. Second operand 15 states. [2020-10-27 01:48:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:38,308 INFO L93 Difference]: Finished difference Result 518 states and 705 transitions. [2020-10-27 01:48:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:48:38,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 01:48:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:38,312 INFO L225 Difference]: With dead ends: 518 [2020-10-27 01:48:38,312 INFO L226 Difference]: Without dead ends: 496 [2020-10-27 01:48:38,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:48:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-10-27 01:48:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 448. [2020-10-27 01:48:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-27 01:48:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 617 transitions. [2020-10-27 01:48:38,347 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 617 transitions. Word has length 34 [2020-10-27 01:48:38,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:38,347 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 617 transitions. [2020-10-27 01:48:38,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:48:38,348 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 617 transitions. [2020-10-27 01:48:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:48:38,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:38,349 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] [2020-10-27 01:48:38,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:48:38,349 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1530054395, now seen corresponding path program 9 times [2020-10-27 01:48:38,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:38,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164401350] [2020-10-27 01:48:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:38,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:40,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:40,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:48:40,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:48:40,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1936 [2020-10-27 01:48:40,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:40,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:48:40,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:40,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:48:40,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:40,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:40,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:40,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:40,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:40,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:40,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:40,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:40,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:40,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:40,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:40,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:48:40,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164401350] [2020-10-27 01:48:40,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:40,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:48:40,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579488049] [2020-10-27 01:48:40,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:48:40,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:40,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:48:40,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:48:40,456 INFO L87 Difference]: Start difference. First operand 448 states and 617 transitions. Second operand 9 states. [2020-10-27 01:48:40,989 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 01:48:41,302 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 01:48:46,397 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 01:48:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:47,111 INFO L93 Difference]: Finished difference Result 973 states and 1288 transitions. [2020-10-27 01:48:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:48:47,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 01:48:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:47,116 INFO L225 Difference]: With dead ends: 973 [2020-10-27 01:48:47,116 INFO L226 Difference]: Without dead ends: 955 [2020-10-27 01:48:47,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:48:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-10-27 01:48:47,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 480. [2020-10-27 01:48:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-27 01:48:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 664 transitions. [2020-10-27 01:48:47,159 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 664 transitions. Word has length 34 [2020-10-27 01:48:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:47,159 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 664 transitions. [2020-10-27 01:48:47,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:48:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 664 transitions. [2020-10-27 01:48:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:48:47,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:47,161 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 01:48:47,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:48:47,161 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:47,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1409539249, now seen corresponding path program 11 times [2020-10-27 01:48:47,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:47,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707322186] [2020-10-27 01:48:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:47,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:49,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:49,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:48:49,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:48:49,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2681 [2020-10-27 01:48:49,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:49,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:48:49,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:48:49,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:48:49,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:50,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:50,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:50,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:50,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:50,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:50,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:50,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:50,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:50,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:50,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:50,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-27 01:48:50,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707322186] [2020-10-27 01:48:50,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:50,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:48:50,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522813606] [2020-10-27 01:48:50,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:48:50,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:50,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:48:50,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:48:50,041 INFO L87 Difference]: Start difference. First operand 480 states and 664 transitions. Second operand 10 states. [2020-10-27 01:48:51,233 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-27 01:48:51,575 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-27 01:48:53,958 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-27 01:49:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:00,846 INFO L93 Difference]: Finished difference Result 928 states and 1243 transitions. [2020-10-27 01:49:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:49:00,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-27 01:49:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:00,851 INFO L225 Difference]: With dead ends: 928 [2020-10-27 01:49:00,852 INFO L226 Difference]: Without dead ends: 898 [2020-10-27 01:49:00,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=160, Invalid=541, Unknown=1, NotChecked=0, Total=702 [2020-10-27 01:49:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-10-27 01:49:00,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 434. [2020-10-27 01:49:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-10-27 01:49:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 611 transitions. [2020-10-27 01:49:00,896 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 611 transitions. Word has length 35 [2020-10-27 01:49:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:00,896 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 611 transitions. [2020-10-27 01:49:00,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:49:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 611 transitions. [2020-10-27 01:49:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:49:00,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:00,898 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:00,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:49:00,898 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:00,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:00,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1157129890, now seen corresponding path program 10 times [2020-10-27 01:49:00,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:00,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259841706] [2020-10-27 01:49:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:00,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:00,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:01,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:01,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:01,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:05,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:05,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:49:05,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:49:05,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:49:05,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:05,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:49:05,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:05,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:49:05,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:06,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:06,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:06,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:06,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:06,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:06,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:06,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:06,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:06,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:06,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:06,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:49:06,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259841706] [2020-10-27 01:49:06,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:06,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:49:06,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571267343] [2020-10-27 01:49:06,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:49:06,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:49:06,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:49:06,222 INFO L87 Difference]: Start difference. First operand 434 states and 611 transitions. Second operand 15 states. [2020-10-27 01:49:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:10,086 INFO L93 Difference]: Finished difference Result 654 states and 975 transitions. [2020-10-27 01:49:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:49:10,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 01:49:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:10,089 INFO L225 Difference]: With dead ends: 654 [2020-10-27 01:49:10,089 INFO L226 Difference]: Without dead ends: 565 [2020-10-27 01:49:10,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=306, Invalid=3234, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 01:49:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2020-10-27 01:49:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 470. [2020-10-27 01:49:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-27 01:49:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 657 transitions. [2020-10-27 01:49:10,131 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 657 transitions. Word has length 35 [2020-10-27 01:49:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:10,132 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 657 transitions. [2020-10-27 01:49:10,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:49:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 657 transitions. [2020-10-27 01:49:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:49:10,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:10,133 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:10,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:49:10,134 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:10,134 INFO L82 PathProgramCache]: Analyzing trace with hash 395478287, now seen corresponding path program 12 times [2020-10-27 01:49:10,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:10,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976734299] [2020-10-27 01:49:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:10,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:10,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:10,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:10,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:10,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:13,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:49:13,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:49:13,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3482 [2020-10-27 01:49:13,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:49:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:49:13,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:13,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:13,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:13,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:13,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:13,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:13,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:13,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:13,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:13,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:13,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-27 01:49:13,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976734299] [2020-10-27 01:49:13,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:13,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:49:13,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746635896] [2020-10-27 01:49:13,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:49:13,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:13,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:49:13,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:49:13,884 INFO L87 Difference]: Start difference. First operand 470 states and 657 transitions. Second operand 13 states. [2020-10-27 01:49:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:15,419 INFO L93 Difference]: Finished difference Result 552 states and 759 transitions. [2020-10-27 01:49:15,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:49:15,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 01:49:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:15,423 INFO L225 Difference]: With dead ends: 552 [2020-10-27 01:49:15,423 INFO L226 Difference]: Without dead ends: 531 [2020-10-27 01:49:15,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:49:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2020-10-27 01:49:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 470. [2020-10-27 01:49:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-27 01:49:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 656 transitions. [2020-10-27 01:49:15,465 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 656 transitions. Word has length 35 [2020-10-27 01:49:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:15,466 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 656 transitions. [2020-10-27 01:49:15,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:49:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 656 transitions. [2020-10-27 01:49:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:49:15,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:15,467 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:15,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:49:15,468 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:15,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1770541488, now seen corresponding path program 11 times [2020-10-27 01:49:15,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:15,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829948373] [2020-10-27 01:49:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:15,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:15,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:15,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:15,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:15,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:17,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:17,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:49:17,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:49:17,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2068 [2020-10-27 01:49:17,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:17,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:49:17,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:17,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:49:17,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:17,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:17,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:17,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:17,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:17,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:17,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:49:17,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:17,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:17,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:17,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:17,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-27 01:49:17,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829948373] [2020-10-27 01:49:17,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:17,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:49:17,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135959463] [2020-10-27 01:49:17,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:49:17,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:17,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:49:17,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:49:17,803 INFO L87 Difference]: Start difference. First operand 470 states and 656 transitions. Second operand 13 states. [2020-10-27 01:49:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:19,411 INFO L93 Difference]: Finished difference Result 567 states and 774 transitions. [2020-10-27 01:49:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:49:19,412 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 01:49:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:19,415 INFO L225 Difference]: With dead ends: 567 [2020-10-27 01:49:19,415 INFO L226 Difference]: Without dead ends: 548 [2020-10-27 01:49:19,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:49:19,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-27 01:49:19,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 470. [2020-10-27 01:49:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-27 01:49:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 655 transitions. [2020-10-27 01:49:19,449 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 655 transitions. Word has length 35 [2020-10-27 01:49:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:19,450 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 655 transitions. [2020-10-27 01:49:19,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:49:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 655 transitions. [2020-10-27 01:49:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:49:19,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:19,452 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:19,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:49:19,452 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:19,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1271995266, now seen corresponding path program 12 times [2020-10-27 01:49:19,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:19,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61083327] [2020-10-27 01:49:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:19,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:22,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:22,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:49:22,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:49:22,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3354 [2020-10-27 01:49:22,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:49:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:49:22,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:23,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:23,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:23,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:23,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:23,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:23,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:23,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:23,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:49:23,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61083327] [2020-10-27 01:49:23,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:23,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:49:23,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611769637] [2020-10-27 01:49:23,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:49:23,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:23,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:49:23,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:49:23,344 INFO L87 Difference]: Start difference. First operand 470 states and 655 transitions. Second operand 20 states. [2020-10-27 01:49:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:27,476 INFO L93 Difference]: Finished difference Result 765 states and 1190 transitions. [2020-10-27 01:49:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:49:27,477 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-10-27 01:49:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:27,481 INFO L225 Difference]: With dead ends: 765 [2020-10-27 01:49:27,481 INFO L226 Difference]: Without dead ends: 728 [2020-10-27 01:49:27,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=1221, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:49:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-10-27 01:49:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 496. [2020-10-27 01:49:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-10-27 01:49:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 694 transitions. [2020-10-27 01:49:27,522 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 694 transitions. Word has length 35 [2020-10-27 01:49:27,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:27,522 INFO L481 AbstractCegarLoop]: Abstraction has 496 states and 694 transitions. [2020-10-27 01:49:27,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:49:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 694 transitions. [2020-10-27 01:49:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:49:27,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:27,524 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:27,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:49:27,524 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:27,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:27,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1759054375, now seen corresponding path program 3 times [2020-10-27 01:49:27,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:27,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405071418] [2020-10-27 01:49:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:27,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:27,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:28,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:28,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:49:28,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:28,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-27 01:49:28,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:28,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:49:28,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:49:28,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:49:28,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:28,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:28,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:28,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:28,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:28,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:28,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:28,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:28,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:28,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:28,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:28,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 01:49:28,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405071418] [2020-10-27 01:49:28,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:28,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:49:28,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811666935] [2020-10-27 01:49:28,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:49:28,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:28,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:49:28,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:49:28,274 INFO L87 Difference]: Start difference. First operand 496 states and 694 transitions. Second operand 9 states. [2020-10-27 01:49:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:29,017 INFO L93 Difference]: Finished difference Result 848 states and 1153 transitions. [2020-10-27 01:49:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:49:29,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 01:49:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:29,021 INFO L225 Difference]: With dead ends: 848 [2020-10-27 01:49:29,022 INFO L226 Difference]: Without dead ends: 690 [2020-10-27 01:49:29,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:49:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2020-10-27 01:49:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 503. [2020-10-27 01:49:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-10-27 01:49:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 694 transitions. [2020-10-27 01:49:29,068 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 694 transitions. Word has length 36 [2020-10-27 01:49:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:29,068 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 694 transitions. [2020-10-27 01:49:29,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:49:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 694 transitions. [2020-10-27 01:49:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:49:29,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:29,070 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:29,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:49:29,070 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash 559172282, now seen corresponding path program 13 times [2020-10-27 01:49:29,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:29,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485607396] [2020-10-27 01:49:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:29,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:29,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:29,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:29,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:29,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:31,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:33,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:49:33,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:49:33,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4474 [2020-10-27 01:49:33,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:33,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:49:33,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:33,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:49:33,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:33,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:33,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:33,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:33,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:33,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:33,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:33,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 01:49:33,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485607396] [2020-10-27 01:49:33,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:33,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:49:33,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40007272] [2020-10-27 01:49:33,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:49:33,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:33,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:49:33,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:49:33,809 INFO L87 Difference]: Start difference. First operand 503 states and 694 transitions. Second operand 13 states. [2020-10-27 01:49:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:35,275 INFO L93 Difference]: Finished difference Result 586 states and 799 transitions. [2020-10-27 01:49:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:49:35,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-27 01:49:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:35,279 INFO L225 Difference]: With dead ends: 586 [2020-10-27 01:49:35,279 INFO L226 Difference]: Without dead ends: 563 [2020-10-27 01:49:35,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:49:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2020-10-27 01:49:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 503. [2020-10-27 01:49:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-10-27 01:49:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 693 transitions. [2020-10-27 01:49:35,317 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 693 transitions. Word has length 36 [2020-10-27 01:49:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:35,318 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 693 transitions. [2020-10-27 01:49:35,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:49:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 693 transitions. [2020-10-27 01:49:35,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:49:35,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:35,319 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:35,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:49:35,320 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:35,320 INFO L82 PathProgramCache]: Analyzing trace with hash -745718790, now seen corresponding path program 13 times [2020-10-27 01:49:35,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:35,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162388474] [2020-10-27 01:49:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:35,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:35,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:35,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:35,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:35,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:38,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:38,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:49:38,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:49:38,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3581 [2020-10-27 01:49:38,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:38,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:49:38,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:38,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:49:38,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:39,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:39,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:39,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:39,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:39,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:39,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:39,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:49:39,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162388474] [2020-10-27 01:49:39,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:39,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:49:39,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494202709] [2020-10-27 01:49:39,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:49:39,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:39,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:49:39,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:49:39,450 INFO L87 Difference]: Start difference. First operand 503 states and 693 transitions. Second operand 21 states. [2020-10-27 01:49:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:43,758 INFO L93 Difference]: Finished difference Result 823 states and 1280 transitions. [2020-10-27 01:49:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:49:43,759 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-10-27 01:49:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:43,763 INFO L225 Difference]: With dead ends: 823 [2020-10-27 01:49:43,763 INFO L226 Difference]: Without dead ends: 778 [2020-10-27 01:49:43,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:49:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-10-27 01:49:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 496. [2020-10-27 01:49:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-10-27 01:49:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 681 transitions. [2020-10-27 01:49:43,796 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 681 transitions. Word has length 36 [2020-10-27 01:49:43,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:43,797 INFO L481 AbstractCegarLoop]: Abstraction has 496 states and 681 transitions. [2020-10-27 01:49:43,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:49:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 681 transitions. [2020-10-27 01:49:43,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:49:43,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:43,798 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:43,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:49:43,799 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:43,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:43,799 INFO L82 PathProgramCache]: Analyzing trace with hash 447526747, now seen corresponding path program 10 times [2020-10-27 01:49:43,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:43,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053204265] [2020-10-27 01:49:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:43,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:43,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:43,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:44,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:44,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:44,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:45,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:46,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:46,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:49:46,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:49:46,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2258 [2020-10-27 01:49:46,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:49:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:49:46,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:46,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:46,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:46,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:46,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:46,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:46,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:46,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:46,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:46,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:46,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:46,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:49:46,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053204265] [2020-10-27 01:49:46,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:46,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:49:46,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701322814] [2020-10-27 01:49:46,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:49:46,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:46,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:49:46,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:49:46,580 INFO L87 Difference]: Start difference. First operand 496 states and 681 transitions. Second operand 21 states. [2020-10-27 01:49:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:51,051 INFO L93 Difference]: Finished difference Result 555 states and 775 transitions. [2020-10-27 01:49:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:49:51,052 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-10-27 01:49:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:51,056 INFO L225 Difference]: With dead ends: 555 [2020-10-27 01:49:51,056 INFO L226 Difference]: Without dead ends: 531 [2020-10-27 01:49:51,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:49:51,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2020-10-27 01:49:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 528. [2020-10-27 01:49:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-10-27 01:49:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 729 transitions. [2020-10-27 01:49:51,088 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 729 transitions. Word has length 36 [2020-10-27 01:49:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:51,088 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 729 transitions. [2020-10-27 01:49:51,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:49:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 729 transitions. [2020-10-27 01:49:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:49:51,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:51,090 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] [2020-10-27 01:49:51,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:49:51,090 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:51,090 INFO L82 PathProgramCache]: Analyzing trace with hash -179424336, now seen corresponding path program 11 times [2020-10-27 01:49:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:51,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307940008] [2020-10-27 01:49:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:51,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:51,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:51,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:51,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:54,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:54,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:49:54,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:49:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3703 [2020-10-27 01:49:54,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:49:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:49:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:49:54,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:54,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:54,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:54,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:54,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:54,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:54,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:54,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:54,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 01:49:54,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307940008] [2020-10-27 01:49:54,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:55,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:49:55,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441014415] [2020-10-27 01:49:55,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:49:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:55,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:49:55,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:49:55,000 INFO L87 Difference]: Start difference. First operand 528 states and 729 transitions. Second operand 10 states. [2020-10-27 01:49:55,466 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 01:49:56,036 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-27 01:49:58,621 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 01:49:59,433 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 01:49:59,786 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 01:50:03,821 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 01:50:05,185 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 01:50:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:05,862 INFO L93 Difference]: Finished difference Result 1288 states and 1675 transitions. [2020-10-27 01:50:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:50:05,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-27 01:50:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:05,869 INFO L225 Difference]: With dead ends: 1288 [2020-10-27 01:50:05,869 INFO L226 Difference]: Without dead ends: 1268 [2020-10-27 01:50:05,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:50:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2020-10-27 01:50:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 563. [2020-10-27 01:50:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-10-27 01:50:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 780 transitions. [2020-10-27 01:50:05,917 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 780 transitions. Word has length 37 [2020-10-27 01:50:05,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:05,917 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 780 transitions. [2020-10-27 01:50:05,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:50:05,917 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 780 transitions. [2020-10-27 01:50:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:50:05,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:05,919 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:05,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:50:05,919 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1444901537, now seen corresponding path program 14 times [2020-10-27 01:50:05,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:05,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5441114] [2020-10-27 01:50:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:05,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:05,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:06,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:06,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:06,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:06,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:09,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:09,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:50:09,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:50:09,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3966 [2020-10-27 01:50:09,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:09,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:50:09,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:09,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:50:09,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:10,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:10,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:10,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:10,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:10,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:10,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:10,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:10,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-27 01:50:10,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5441114] [2020-10-27 01:50:10,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:10,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:50:10,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640003503] [2020-10-27 01:50:10,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:50:10,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:10,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:50:10,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:50:10,196 INFO L87 Difference]: Start difference. First operand 563 states and 780 transitions. Second operand 14 states. [2020-10-27 01:50:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:11,963 INFO L93 Difference]: Finished difference Result 679 states and 921 transitions. [2020-10-27 01:50:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:50:11,964 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 01:50:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:11,967 INFO L225 Difference]: With dead ends: 679 [2020-10-27 01:50:11,968 INFO L226 Difference]: Without dead ends: 657 [2020-10-27 01:50:11,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:50:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-10-27 01:50:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 563. [2020-10-27 01:50:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-10-27 01:50:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 779 transitions. [2020-10-27 01:50:12,012 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 779 transitions. Word has length 37 [2020-10-27 01:50:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:12,012 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 779 transitions. [2020-10-27 01:50:12,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:50:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 779 transitions. [2020-10-27 01:50:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:50:12,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:12,014 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:12,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:50:12,014 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:12,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:12,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2015314690, now seen corresponding path program 14 times [2020-10-27 01:50:12,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:12,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533664709] [2020-10-27 01:50:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:12,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:14,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:14,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:50:14,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:50:14,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-10-27 01:50:14,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:14,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:50:14,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:14,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:50:14,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:14,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:14,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:14,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:14,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:14,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:14,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:14,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:14,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:14,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:14,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:14,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:14,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533664709] [2020-10-27 01:50:14,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:14,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:50:14,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460078862] [2020-10-27 01:50:14,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:50:14,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:14,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:50:14,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:50:14,747 INFO L87 Difference]: Start difference. First operand 563 states and 779 transitions. Second operand 24 states. [2020-10-27 01:50:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:17,664 INFO L93 Difference]: Finished difference Result 697 states and 939 transitions. [2020-10-27 01:50:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:50:17,665 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2020-10-27 01:50:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:17,668 INFO L225 Difference]: With dead ends: 697 [2020-10-27 01:50:17,668 INFO L226 Difference]: Without dead ends: 677 [2020-10-27 01:50:17,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:50:17,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-10-27 01:50:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 563. [2020-10-27 01:50:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-10-27 01:50:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 778 transitions. [2020-10-27 01:50:17,707 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 778 transitions. Word has length 37 [2020-10-27 01:50:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:17,707 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 778 transitions. [2020-10-27 01:50:17,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:50:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 778 transitions. [2020-10-27 01:50:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:50:17,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:17,708 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:17,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:50:17,708 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1611017218, now seen corresponding path program 15 times [2020-10-27 01:50:17,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:17,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702846229] [2020-10-27 01:50:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:17,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:17,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:18,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:18,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:22,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:22,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:50:22,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:50:22,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4624 [2020-10-27 01:50:22,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:22,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:50:22,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:22,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:50:22,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:22,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:22,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:22,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:22,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:22,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:22,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:22,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:22,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:22,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:22,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:50:22,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702846229] [2020-10-27 01:50:22,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:22,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:50:22,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302241427] [2020-10-27 01:50:22,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:50:22,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:22,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:50:22,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:50:22,957 INFO L87 Difference]: Start difference. First operand 563 states and 778 transitions. Second operand 22 states. [2020-10-27 01:50:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:27,962 INFO L93 Difference]: Finished difference Result 971 states and 1530 transitions. [2020-10-27 01:50:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:50:27,963 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-10-27 01:50:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:27,967 INFO L225 Difference]: With dead ends: 971 [2020-10-27 01:50:27,968 INFO L226 Difference]: Without dead ends: 927 [2020-10-27 01:50:27,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:50:27,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2020-10-27 01:50:28,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 592. [2020-10-27 01:50:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-10-27 01:50:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 820 transitions. [2020-10-27 01:50:28,006 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 820 transitions. Word has length 37 [2020-10-27 01:50:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:28,006 INFO L481 AbstractCegarLoop]: Abstraction has 592 states and 820 transitions. [2020-10-27 01:50:28,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:50:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 820 transitions. [2020-10-27 01:50:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:50:28,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:28,007 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 01:50:28,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:50:28,008 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:28,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1431194938, now seen corresponding path program 15 times [2020-10-27 01:50:28,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:28,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10338676] [2020-10-27 01:50:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:28,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:28,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:28,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:28,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking...