/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-programs/copysome2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:51:16,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:51:16,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:51:16,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:51:16,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:51:16,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:51:16,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:51:16,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:51:16,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:51:16,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:51:16,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:51:16,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:51:16,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:51:16,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:51:16,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:51:16,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:51:16,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:51:16,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:51:16,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:51:16,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:51:16,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:51:16,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:51:16,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:51:16,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:51:16,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:51:16,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:51:16,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:51:16,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:51:16,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:51:16,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:51:16,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:51:16,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:51:16,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:51:16,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:51:16,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:51:16,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:51:16,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:51:16,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:51:16,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:51:16,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:51:16,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:51:16,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:51:16,615 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:51:16,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:51:16,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:51:16,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:51:16,619 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:51:16,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:51:16,619 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:51:16,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:51:16,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:51:16,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:51:16,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:51:16,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:51:16,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:51:16,621 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:51:16,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:51:16,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:51:16,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:51:16,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:51:16,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:51:16,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:51:16,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:51:16,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:51:16,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:51:16,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:51:16,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:51:16,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:51:16,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:51:16,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:51:16,626 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:51:16,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:51:16,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:51:17,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:51:17,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:51:17,028 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:51:17,029 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:51:17,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-1.i [2020-10-26 19:51:17,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42e438e3c/0135924768e84602b02954d5e9fc7536/FLAGc75aa308b [2020-10-26 19:51:17,747 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:51:17,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/copysome2-1.i [2020-10-26 19:51:17,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42e438e3c/0135924768e84602b02954d5e9fc7536/FLAGc75aa308b [2020-10-26 19:51:18,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42e438e3c/0135924768e84602b02954d5e9fc7536 [2020-10-26 19:51:18,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:51:18,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:51:18,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:51:18,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:51:18,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:51:18,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:51:18" (1/1) ... [2020-10-26 19:51:18,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ee6e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18, skipping insertion in model container [2020-10-26 19:51:18,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:51:18" (1/1) ... [2020-10-26 19:51:18,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:51:18,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:51:18,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:51:18,386 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:51:18,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:51:18,428 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:51:18,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18 WrapperNode [2020-10-26 19:51:18,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:51:18,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:51:18,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:51:18,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:51:18,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18" (1/1) ... [2020-10-26 19:51:18,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18" (1/1) ... [2020-10-26 19:51:18,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18" (1/1) ... [2020-10-26 19:51:18,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18" (1/1) ... [2020-10-26 19:51:18,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18" (1/1) ... [2020-10-26 19:51:18,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18" (1/1) ... [2020-10-26 19:51:18,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18" (1/1) ... [2020-10-26 19:51:18,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:51:18,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:51:18,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:51:18,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:51:18,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:51:18,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:51:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:51:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:51:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:51:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:51:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:51:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:51:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:51:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:51:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:51:18,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:51:18,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:51:18,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:51:18,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:51:18,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:51:18,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:51:18,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:51:18,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:51:18,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:51:18,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:51:18,962 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:51:18,964 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 19:51:18,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:51:18 BoogieIcfgContainer [2020-10-26 19:51:18,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:51:18,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:51:18,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:51:18,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:51:18,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:51:18" (1/3) ... [2020-10-26 19:51:18,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196b8500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:51:18, skipping insertion in model container [2020-10-26 19:51:18,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:18" (2/3) ... [2020-10-26 19:51:18,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196b8500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:51:18, skipping insertion in model container [2020-10-26 19:51:18,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:51:18" (3/3) ... [2020-10-26 19:51:18,992 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2020-10-26 19:51:19,024 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:51:19,034 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:51:19,062 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:51:19,093 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:51:19,093 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:51:19,094 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:51:19,094 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:51:19,094 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:51:19,094 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:51:19,094 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:51:19,094 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:51:19,151 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-26 19:51:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:51:19,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:19,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:19,159 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash -843734543, now seen corresponding path program 1 times [2020-10-26 19:51:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:19,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280353954] [2020-10-26 19:51:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:19,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:19,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:19,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:19,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:19,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:51:19,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:51:19,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-26 19:51:19,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:19,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:19,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:51:19,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:19,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 19:51:19,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:19,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:19,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:19,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:19,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:19,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:51:19,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:19,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:19,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:19,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:19,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:19,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280353954] [2020-10-26 19:51:19,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:51:19,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:51:19,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843889410] [2020-10-26 19:51:19,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:51:19,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:19,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:51:19,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:51:19,871 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-26 19:51:20,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:20,058 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2020-10-26 19:51:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:51:20,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-26 19:51:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:20,068 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:51:20,069 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 19:51:20,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:51:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 19:51:20,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-26 19:51:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:51:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-26 19:51:20,118 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 19 [2020-10-26 19:51:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:20,118 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-26 19:51:20,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:51:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-26 19:51:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:51:20,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:20,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:20,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:51:20,121 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:20,122 INFO L82 PathProgramCache]: Analyzing trace with hash -791688032, now seen corresponding path program 1 times [2020-10-26 19:51:20,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:20,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217639631] [2020-10-26 19:51:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:20,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:20,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:20,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:20,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:20,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:51:20,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:51:20,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-26 19:51:20,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:20,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:51:20,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:20,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:51:20,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:20,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:20,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:20,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:20,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:20,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:51:20,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:20,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217639631] [2020-10-26 19:51:20,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:51:20,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:51:20,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280390626] [2020-10-26 19:51:20,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:51:20,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:20,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:51:20,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:51:20,536 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2020-10-26 19:51:20,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:20,656 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-10-26 19:51:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:51:20,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-26 19:51:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:20,658 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:51:20,658 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:51:20,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:51:20,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:51:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-26 19:51:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:51:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-26 19:51:20,669 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2020-10-26 19:51:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:20,670 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-26 19:51:20,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:51:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-26 19:51:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:51:20,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:20,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:20,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:51:20,672 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash 577044293, now seen corresponding path program 1 times [2020-10-26 19:51:20,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:20,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300613489] [2020-10-26 19:51:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:20,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:21,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:23,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:23,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:51:23,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:51:23,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2587 [2020-10-26 19:51:23,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:23,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:51:23,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:23,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:51:23,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:23,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:23,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:23,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:23,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:23,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:23,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:51:23,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:23,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:23,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:23,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:23,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:51:23,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300613489] [2020-10-26 19:51:23,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:23,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:51:23,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100262632] [2020-10-26 19:51:23,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:51:23,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:23,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:51:23,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:51:23,367 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 5 states. [2020-10-26 19:51:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:23,517 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-10-26 19:51:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:51:23,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-26 19:51:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:23,519 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:51:23,519 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:51:23,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:51:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:51:23,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-10-26 19:51:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:51:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-26 19:51:23,538 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 27 [2020-10-26 19:51:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:23,541 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-26 19:51:23,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:51:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-26 19:51:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:51:23,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:23,543 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:23,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:51:23,543 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash -809283652, now seen corresponding path program 2 times [2020-10-26 19:51:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:23,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93939130] [2020-10-26 19:51:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:23,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:23,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:24,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:28,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:28,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:51:28,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:51:28,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:51:28,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:51:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:28,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:51:28,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:51:29,238 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 41 [2020-10-26 19:51:29,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:29,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:29,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:29,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:29,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:29,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:51:29,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:29,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:29,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:29,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:29,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:51:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93939130] [2020-10-26 19:51:29,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:29,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:51:29,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920398074] [2020-10-26 19:51:29,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:51:29,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:29,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:51:29,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:51:29,502 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 13 states. [2020-10-26 19:51:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:30,240 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2020-10-26 19:51:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:51:30,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-26 19:51:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:30,244 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:51:30,244 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:51:30,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:51:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:51:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2020-10-26 19:51:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:51:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2020-10-26 19:51:30,264 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 35 [2020-10-26 19:51:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:30,265 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2020-10-26 19:51:30,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:51:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2020-10-26 19:51:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:51:30,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:30,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:30,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:51:30,267 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:30,268 INFO L82 PathProgramCache]: Analyzing trace with hash -590428934, now seen corresponding path program 1 times [2020-10-26 19:51:30,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:30,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314042132] [2020-10-26 19:51:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:30,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:30,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:30,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:30,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:31,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:31,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:31,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:32,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:35,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:35,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:51:35,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:51:35,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:51:35,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:35,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:51:35,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:35,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:51:35,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:35,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:35,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:35,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:35,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:35,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:35,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:51:35,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:35,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:35,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:35,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:35,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 19:51:35,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314042132] [2020-10-26 19:51:35,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:35,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:51:35,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963094572] [2020-10-26 19:51:35,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:51:35,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:35,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:51:35,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:51:35,394 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand 6 states. [2020-10-26 19:51:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:35,607 INFO L93 Difference]: Finished difference Result 147 states and 190 transitions. [2020-10-26 19:51:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:51:35,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-26 19:51:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:35,610 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:51:35,611 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:51:35,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:51:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:51:35,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-10-26 19:51:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:51:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2020-10-26 19:51:35,627 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 35 [2020-10-26 19:51:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:35,627 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2020-10-26 19:51:35,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:51:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2020-10-26 19:51:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:51:35,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:35,629 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:35,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:51:35,630 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:35,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1759457569, now seen corresponding path program 2 times [2020-10-26 19:51:35,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:35,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258266309] [2020-10-26 19:51:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:35,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:35,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:35,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:35,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:35,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:36,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:36,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:40,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:40,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:51:40,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:51:40,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:51:40,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:51:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:51:40,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:40,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:40,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:40,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:40,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:40,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:40,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:40,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:40,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:40,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:40,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:40,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-26 19:51:40,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258266309] [2020-10-26 19:51:40,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:40,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:51:40,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992436333] [2020-10-26 19:51:40,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:51:40,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:40,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:51:40,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:51:40,737 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand 7 states. [2020-10-26 19:51:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:40,930 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2020-10-26 19:51:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:51:40,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-26 19:51:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:40,932 INFO L225 Difference]: With dead ends: 179 [2020-10-26 19:51:40,932 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:51:40,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:51:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:51:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-10-26 19:51:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:51:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2020-10-26 19:51:40,948 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 43 [2020-10-26 19:51:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:40,948 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2020-10-26 19:51:40,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:51:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2020-10-26 19:51:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:51:40,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:40,952 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:40,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:51:40,952 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash 585830678, now seen corresponding path program 3 times [2020-10-26 19:51:40,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:40,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166250068] [2020-10-26 19:51:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:40,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:40,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:41,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:41,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:41,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:41,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:42,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:43,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:43,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:46,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:46,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:51:46,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:51:46,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-26 19:51:46,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:51:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:51:46,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:46,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:46,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:46,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:46,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:46,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:46,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:51:46,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-26 19:51:46,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166250068] [2020-10-26 19:51:46,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:51:46,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:51:46,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383166815] [2020-10-26 19:51:46,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:51:46,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:46,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:51:46,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:51:46,122 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand 5 states. [2020-10-26 19:51:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:46,267 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2020-10-26 19:51:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:51:46,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-10-26 19:51:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:46,269 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:51:46,270 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:51:46,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:51:46,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:51:46,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-26 19:51:46,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:51:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-26 19:51:46,286 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 51 [2020-10-26 19:51:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:46,287 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-26 19:51:46,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:51:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-26 19:51:46,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:51:46,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:46,288 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:46,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:51:46,289 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:46,289 INFO L82 PathProgramCache]: Analyzing trace with hash -490032334, now seen corresponding path program 1 times [2020-10-26 19:51:46,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:46,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893721862] [2020-10-26 19:51:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:46,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:46,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:46,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:51,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:51,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:51:51,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:51:51,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 19:51:51,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:51:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:51:51,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:51,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:51,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:51,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:51,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:51,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:51,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:51:51,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:51,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:51,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:51,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:51,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:51,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:51:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:51,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:51,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:51,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:51:51,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:51,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:51:51,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:51,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:51,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:51:51,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:51,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-26 19:51:51,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893721862] [2020-10-26 19:51:51,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:51,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:51:51,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907594264] [2020-10-26 19:51:51,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:51:51,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:51,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:51:51,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:51:51,472 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2020-10-26 19:51:51,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:51,730 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2020-10-26 19:51:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:51:51,731 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-26 19:51:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:51,732 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:51:51,732 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:51:51,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:51:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:51:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-10-26 19:51:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:51:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-10-26 19:51:51,745 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 59 [2020-10-26 19:51:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:51,745 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-10-26 19:51:51,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:51:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-10-26 19:51:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:51:51,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:51,747 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:51,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:51:51,747 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:51,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:51,748 INFO L82 PathProgramCache]: Analyzing trace with hash -8397737, now seen corresponding path program 2 times [2020-10-26 19:51:51,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:51,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354401759] [2020-10-26 19:51:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:51,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:51,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:51,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:56,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:56,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:51:56,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:51:56,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-26 19:51:56,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:56,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:51:56,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:56,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:51:56,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:51:56,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:56,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:56,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:56,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:56,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:56,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:51:56,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:56,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:56,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:56,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:56,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:56,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:51:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:56,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:56,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:56,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:51:56,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:56,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:51:56,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:56,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:56,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:51:56,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:56,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 19:51:56,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354401759] [2020-10-26 19:51:56,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:56,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:51:56,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274322336] [2020-10-26 19:51:56,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:51:56,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:56,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:51:56,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:51:56,952 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 9 states. [2020-10-26 19:51:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:57,263 INFO L93 Difference]: Finished difference Result 136 states and 164 transitions. [2020-10-26 19:51:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:51:57,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-26 19:51:57,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:57,264 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:51:57,265 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:51:57,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:51:57,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:51:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-10-26 19:51:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:51:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-26 19:51:57,277 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 67 [2020-10-26 19:51:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:57,277 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-26 19:51:57,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:51:57,277 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-26 19:51:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:51:57,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:57,279 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:57,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:51:57,279 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:57,280 INFO L82 PathProgramCache]: Analyzing trace with hash -602290610, now seen corresponding path program 3 times [2020-10-26 19:51:57,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:57,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234162678] [2020-10-26 19:51:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:57,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:57,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:57,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:02,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:02,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:52:02,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:02,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-26 19:52:02,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:02,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:52:02,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:02,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:52:02,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:02,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:02,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:02,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:02,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:02,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:02,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:02,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:02,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:02,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:02,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:02,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:52:02,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:52:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:02,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:02,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:02,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:02,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:02,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:02,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:02,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:02,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:02,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:02,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-10-26 19:52:02,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234162678] [2020-10-26 19:52:02,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:02,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:52:02,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133883727] [2020-10-26 19:52:02,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:52:02,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:02,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:52:02,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:52:02,521 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 10 states. [2020-10-26 19:52:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:02,810 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2020-10-26 19:52:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:52:02,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-26 19:52:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:02,812 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:52:02,813 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:52:02,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:52:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:52:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2020-10-26 19:52:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:52:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-26 19:52:02,826 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 75 [2020-10-26 19:52:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:02,826 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-26 19:52:02,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:52:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-26 19:52:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:52:02,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:02,828 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:02,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:52:02,829 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash 29510963, now seen corresponding path program 4 times [2020-10-26 19:52:02,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:02,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179398132] [2020-10-26 19:52:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:02,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:02,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:02,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:07,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:07,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:52:07,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:07,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:52:07,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:07,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:52:07,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:07,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:52:07,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:07,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:07,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:07,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:07,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:07,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:07,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:52:07,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:07,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:07,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:07,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:07,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:07,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:52:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:07,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:07,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:07,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:07,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:07,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:07,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:07,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:07,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:07,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:07,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-10-26 19:52:07,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179398132] [2020-10-26 19:52:07,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:07,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:52:07,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517615848] [2020-10-26 19:52:07,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:52:07,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:52:07,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:52:07,998 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 11 states. [2020-10-26 19:52:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:08,377 INFO L93 Difference]: Finished difference Result 164 states and 200 transitions. [2020-10-26 19:52:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:52:08,378 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-10-26 19:52:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:08,379 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:52:08,380 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:52:08,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:52:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:52:08,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2020-10-26 19:52:08,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:52:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2020-10-26 19:52:08,416 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 83 [2020-10-26 19:52:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:08,421 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2020-10-26 19:52:08,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:52:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2020-10-26 19:52:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:52:08,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:08,428 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:08,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:52:08,429 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:08,430 INFO L82 PathProgramCache]: Analyzing trace with hash -856584342, now seen corresponding path program 5 times [2020-10-26 19:52:08,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:08,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367997672] [2020-10-26 19:52:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:08,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:08,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:08,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:13,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:13,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:52:13,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:13,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-26 19:52:13,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:13,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:52:13,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:13,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:52:13,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:13,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:13,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:13,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:13,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:13,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:13,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:13,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:13,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:13,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:13,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:13,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:13,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:52:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:13,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:13,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:13,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:13,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:13,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:13,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:13,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:13,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:13,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:13,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-10-26 19:52:13,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367997672] [2020-10-26 19:52:13,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:13,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:52:13,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896405540] [2020-10-26 19:52:13,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:52:13,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:13,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:52:13,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:52:13,700 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand 12 states. [2020-10-26 19:52:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:14,065 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2020-10-26 19:52:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:52:14,065 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-10-26 19:52:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:14,067 INFO L225 Difference]: With dead ends: 178 [2020-10-26 19:52:14,067 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:52:14,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:52:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:52:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2020-10-26 19:52:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:52:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2020-10-26 19:52:14,092 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 91 [2020-10-26 19:52:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:14,092 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2020-10-26 19:52:14,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:52:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2020-10-26 19:52:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:52:14,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:14,103 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:14,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:52:14,103 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2099438607, now seen corresponding path program 6 times [2020-10-26 19:52:14,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:14,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657238522] [2020-10-26 19:52:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:14,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:19,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:19,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:52:19,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:19,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-26 19:52:19,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:19,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:52:19,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:19,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:52:19,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:19,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:19,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:19,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:19,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:19,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:19,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:19,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:19,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:19,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:19,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-26 19:52:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:19,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:19,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:19,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:19,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:19,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:19,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:19,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-26 19:52:19,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657238522] [2020-10-26 19:52:19,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:19,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:52:19,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72149305] [2020-10-26 19:52:19,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:52:19,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:19,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:52:19,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:52:19,371 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand 13 states. [2020-10-26 19:52:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:19,741 INFO L93 Difference]: Finished difference Result 192 states and 236 transitions. [2020-10-26 19:52:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:52:19,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 99 [2020-10-26 19:52:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:19,743 INFO L225 Difference]: With dead ends: 192 [2020-10-26 19:52:19,744 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:52:19,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:52:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:52:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2020-10-26 19:52:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:52:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2020-10-26 19:52:19,761 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 99 [2020-10-26 19:52:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:19,761 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2020-10-26 19:52:19,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:52:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2020-10-26 19:52:19,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:52:19,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:19,762 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:19,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:52:19,763 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:19,763 INFO L82 PathProgramCache]: Analyzing trace with hash 346492550, now seen corresponding path program 7 times [2020-10-26 19:52:19,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:19,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363570970] [2020-10-26 19:52:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:19,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:19,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:19,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:24,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:24,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:52:24,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-26 19:52:24,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:52:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:52:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:25,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:25,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:25,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:25,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:25,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:52:25,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:25,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:25,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-26 19:52:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:25,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:25,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:25,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:25,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:25,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:25,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:25,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:25,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-10-26 19:52:25,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363570970] [2020-10-26 19:52:25,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:25,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:52:25,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660786724] [2020-10-26 19:52:25,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:52:25,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:52:25,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:52:25,079 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand 14 states. [2020-10-26 19:52:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:25,442 INFO L93 Difference]: Finished difference Result 206 states and 254 transitions. [2020-10-26 19:52:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:52:25,442 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2020-10-26 19:52:25,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:25,444 INFO L225 Difference]: With dead ends: 206 [2020-10-26 19:52:25,444 INFO L226 Difference]: Without dead ends: 123 [2020-10-26 19:52:25,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:52:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-26 19:52:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2020-10-26 19:52:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:52:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2020-10-26 19:52:25,470 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 107 [2020-10-26 19:52:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:25,471 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2020-10-26 19:52:25,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:52:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2020-10-26 19:52:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-26 19:52:25,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:25,476 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:25,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:52:25,476 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:25,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1291673365, now seen corresponding path program 8 times [2020-10-26 19:52:25,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:25,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457142580] [2020-10-26 19:52:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:25,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:25,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:26,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:30,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:52:30,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:30,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-26 19:52:30,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:30,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:52:30,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:30,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:52:30,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:30,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:30,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:30,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:30,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:30,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:52:30,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:30,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:30,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:30,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:30,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:30,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:52:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:30,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:30,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:30,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:30,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:30,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-10-26 19:52:30,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457142580] [2020-10-26 19:52:30,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:30,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:52:30,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495976797] [2020-10-26 19:52:30,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:52:30,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:52:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:52:30,782 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand 15 states. [2020-10-26 19:52:31,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:31,251 INFO L93 Difference]: Finished difference Result 220 states and 272 transitions. [2020-10-26 19:52:31,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:52:31,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 115 [2020-10-26 19:52:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:31,253 INFO L225 Difference]: With dead ends: 220 [2020-10-26 19:52:31,253 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:52:31,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:52:31,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:52:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-10-26 19:52:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:52:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2020-10-26 19:52:31,267 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 115 [2020-10-26 19:52:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:31,267 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2020-10-26 19:52:31,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:52:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2020-10-26 19:52:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 19:52:31,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:31,269 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:31,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:52:31,270 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:31,270 INFO L82 PathProgramCache]: Analyzing trace with hash -292600926, now seen corresponding path program 9 times [2020-10-26 19:52:31,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:31,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011536927] [2020-10-26 19:52:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:31,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:36,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:52:36,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:36,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:52:36,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:36,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:52:36,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:52:36,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:36,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:36,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:36,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:36,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:36,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:36,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:36,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:36,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-26 19:52:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:36,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:36,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:36,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:36,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:36,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:36,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:36,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:36,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:36,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-10-26 19:52:36,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011536927] [2020-10-26 19:52:36,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:36,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:52:36,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353547687] [2020-10-26 19:52:36,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:52:36,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:36,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:52:36,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:52:36,539 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand 16 states. [2020-10-26 19:52:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:37,006 INFO L93 Difference]: Finished difference Result 234 states and 290 transitions. [2020-10-26 19:52:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:52:37,008 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-10-26 19:52:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:37,009 INFO L225 Difference]: With dead ends: 234 [2020-10-26 19:52:37,009 INFO L226 Difference]: Without dead ends: 139 [2020-10-26 19:52:37,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:52:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-26 19:52:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2020-10-26 19:52:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:52:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 161 transitions. [2020-10-26 19:52:37,022 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 161 transitions. Word has length 123 [2020-10-26 19:52:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:37,023 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 161 transitions. [2020-10-26 19:52:37,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:52:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 161 transitions. [2020-10-26 19:52:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-26 19:52:37,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:37,025 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:37,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:52:37,025 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash 935494599, now seen corresponding path program 10 times [2020-10-26 19:52:37,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:37,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693373273] [2020-10-26 19:52:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:42,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:42,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:52:42,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 19:52:42,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:52:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:52:42,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:42,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:42,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:42,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:42,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:42,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:42,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:42,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:42,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:42,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-26 19:52:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:42,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:42,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:42,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:42,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:42,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:42,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:42,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:42,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:42,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:42,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-26 19:52:42,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693373273] [2020-10-26 19:52:42,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:42,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:52:42,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899639492] [2020-10-26 19:52:42,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:52:42,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:42,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:52:42,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:52:42,384 INFO L87 Difference]: Start difference. First operand 134 states and 161 transitions. Second operand 17 states. [2020-10-26 19:52:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:42,814 INFO L93 Difference]: Finished difference Result 248 states and 308 transitions. [2020-10-26 19:52:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:52:42,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 131 [2020-10-26 19:52:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:42,816 INFO L225 Difference]: With dead ends: 248 [2020-10-26 19:52:42,817 INFO L226 Difference]: Without dead ends: 147 [2020-10-26 19:52:42,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:52:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-26 19:52:42,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-10-26 19:52:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:52:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2020-10-26 19:52:42,833 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 131 [2020-10-26 19:52:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:42,834 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2020-10-26 19:52:42,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:52:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2020-10-26 19:52:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-26 19:52:42,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:42,836 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:42,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:52:42,836 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash -771805506, now seen corresponding path program 11 times [2020-10-26 19:52:42,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:42,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906457218] [2020-10-26 19:52:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:42,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:42,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:45,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:47,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:47,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 19:52:47,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:47,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-26 19:52:47,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:52:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:47,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:52:47,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:48,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:48,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:48,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:48,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:48,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:48,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:48,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:48,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:48,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-26 19:52:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:48,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:48,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:48,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:48,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:48,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:48,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:48,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:48,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:48,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:48,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-26 19:52:48,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906457218] [2020-10-26 19:52:48,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:48,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:52:48,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686145006] [2020-10-26 19:52:48,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:52:48,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:48,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:52:48,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:52:48,220 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand 18 states. [2020-10-26 19:52:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:48,727 INFO L93 Difference]: Finished difference Result 262 states and 326 transitions. [2020-10-26 19:52:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:52:48,728 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 139 [2020-10-26 19:52:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:48,730 INFO L225 Difference]: With dead ends: 262 [2020-10-26 19:52:48,730 INFO L226 Difference]: Without dead ends: 155 [2020-10-26 19:52:48,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:52:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-26 19:52:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 150. [2020-10-26 19:52:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-26 19:52:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 181 transitions. [2020-10-26 19:52:48,743 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 181 transitions. Word has length 139 [2020-10-26 19:52:48,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:48,744 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 181 transitions. [2020-10-26 19:52:48,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:52:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 181 transitions. [2020-10-26 19:52:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-26 19:52:48,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:48,745 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:48,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:52:48,746 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:48,746 INFO L82 PathProgramCache]: Analyzing trace with hash 314805411, now seen corresponding path program 12 times [2020-10-26 19:52:48,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:48,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446790550] [2020-10-26 19:52:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:48,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:48,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:51,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:53,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:53,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 19:52:53,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:53,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-26 19:52:53,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:53,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:52:53,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:53,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:52:53,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:54,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:54,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:54,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:54,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:54,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:54,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:52:54,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:54,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:54,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:54,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:54,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:54,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-26 19:52:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:54,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:54,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:54,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:54,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:54,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:54,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:54,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:54,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:54,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:54,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2020-10-26 19:52:54,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446790550] [2020-10-26 19:52:54,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:54,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:52:54,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144464539] [2020-10-26 19:52:54,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:52:54,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:54,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:52:54,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:52:54,155 INFO L87 Difference]: Start difference. First operand 150 states and 181 transitions. Second operand 19 states. [2020-10-26 19:52:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:54,662 INFO L93 Difference]: Finished difference Result 276 states and 344 transitions. [2020-10-26 19:52:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:52:54,663 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 147 [2020-10-26 19:52:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:54,664 INFO L225 Difference]: With dead ends: 276 [2020-10-26 19:52:54,664 INFO L226 Difference]: Without dead ends: 163 [2020-10-26 19:52:54,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:52:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-26 19:52:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 158. [2020-10-26 19:52:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-26 19:52:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 191 transitions. [2020-10-26 19:52:54,678 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 191 transitions. Word has length 147 [2020-10-26 19:52:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:54,678 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 191 transitions. [2020-10-26 19:52:54,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:52:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 191 transitions. [2020-10-26 19:52:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-26 19:52:54,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:54,680 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:54,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:52:54,680 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:54,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:54,681 INFO L82 PathProgramCache]: Analyzing trace with hash -766783526, now seen corresponding path program 13 times [2020-10-26 19:52:54,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:54,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770519514] [2020-10-26 19:52:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:54,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:54,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:59,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:59,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 19:52:59,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:59,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-26 19:52:59,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:59,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:52:59,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:59,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:52:59,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:00,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:00,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:00,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:00,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:00,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:00,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:00,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:00,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:00,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-26 19:53:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:00,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:00,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:00,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:00,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:00,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:53:00,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:00,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:00,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:00,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:00,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2020-10-26 19:53:00,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770519514] [2020-10-26 19:53:00,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:00,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:53:00,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714770724] [2020-10-26 19:53:00,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:53:00,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:00,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:53:00,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:53:00,100 INFO L87 Difference]: Start difference. First operand 158 states and 191 transitions. Second operand 20 states. [2020-10-26 19:53:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:00,589 INFO L93 Difference]: Finished difference Result 290 states and 362 transitions. [2020-10-26 19:53:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:53:00,595 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 155 [2020-10-26 19:53:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:00,597 INFO L225 Difference]: With dead ends: 290 [2020-10-26 19:53:00,597 INFO L226 Difference]: Without dead ends: 171 [2020-10-26 19:53:00,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:53:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-26 19:53:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 166. [2020-10-26 19:53:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-26 19:53:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 201 transitions. [2020-10-26 19:53:00,614 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 201 transitions. Word has length 155 [2020-10-26 19:53:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:00,614 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 201 transitions. [2020-10-26 19:53:00,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:53:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 201 transitions. [2020-10-26 19:53:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-26 19:53:00,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:00,616 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:00,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:53:00,616 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:00,617 INFO L82 PathProgramCache]: Analyzing trace with hash -563692673, now seen corresponding path program 14 times [2020-10-26 19:53:00,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:00,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94802262] [2020-10-26 19:53:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:00,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:00,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:05,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 19:53:05,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:53:05,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5179 [2020-10-26 19:53:05,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:53:05,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:05,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:53:05,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:06,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:06,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:06,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:06,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:06,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:06,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:06,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:06,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-26 19:53:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:06,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:06,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:06,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:06,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:06,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:06,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:06,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:06,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:06,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-26 19:53:06,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94802262] [2020-10-26 19:53:06,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:06,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:53:06,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727013326] [2020-10-26 19:53:06,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:53:06,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:53:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:53:06,235 INFO L87 Difference]: Start difference. First operand 166 states and 201 transitions. Second operand 21 states. [2020-10-26 19:53:06,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:06,864 INFO L93 Difference]: Finished difference Result 304 states and 380 transitions. [2020-10-26 19:53:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:53:06,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 163 [2020-10-26 19:53:06,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:06,866 INFO L225 Difference]: With dead ends: 304 [2020-10-26 19:53:06,866 INFO L226 Difference]: Without dead ends: 179 [2020-10-26 19:53:06,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:53:06,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-26 19:53:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2020-10-26 19:53:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-26 19:53:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 211 transitions. [2020-10-26 19:53:06,887 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 211 transitions. Word has length 163 [2020-10-26 19:53:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:06,889 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 211 transitions. [2020-10-26 19:53:06,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:53:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 211 transitions. [2020-10-26 19:53:06,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-26 19:53:06,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:06,893 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:06,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:53:06,893 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:06,894 INFO L82 PathProgramCache]: Analyzing trace with hash -20306186, now seen corresponding path program 15 times [2020-10-26 19:53:06,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:06,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562839854] [2020-10-26 19:53:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:06,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:07,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:12,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:12,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-26 19:53:12,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:53:12,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-26 19:53:12,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:12,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:53:12,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:12,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:53:12,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:12,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:12,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:12,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:12,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:12,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:12,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:12,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:12,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:12,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 19:53:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:12,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:12,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:12,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:12,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:12,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:53:12,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:12,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2020-10-26 19:53:12,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562839854] [2020-10-26 19:53:12,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:12,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:53:12,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555236984] [2020-10-26 19:53:12,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:53:12,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:53:12,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:53:12,448 INFO L87 Difference]: Start difference. First operand 174 states and 211 transitions. Second operand 22 states. [2020-10-26 19:53:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:13,016 INFO L93 Difference]: Finished difference Result 318 states and 398 transitions. [2020-10-26 19:53:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:53:13,020 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 171 [2020-10-26 19:53:13,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:13,022 INFO L225 Difference]: With dead ends: 318 [2020-10-26 19:53:13,022 INFO L226 Difference]: Without dead ends: 187 [2020-10-26 19:53:13,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:53:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-26 19:53:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2020-10-26 19:53:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-26 19:53:13,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 221 transitions. [2020-10-26 19:53:13,035 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 221 transitions. Word has length 171 [2020-10-26 19:53:13,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:13,035 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 221 transitions. [2020-10-26 19:53:13,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:53:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 221 transitions. [2020-10-26 19:53:13,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-26 19:53:13,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:13,037 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:13,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:53:13,037 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash -401797029, now seen corresponding path program 16 times [2020-10-26 19:53:13,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:13,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662969850] [2020-10-26 19:53:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:13,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:13,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:13,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:18,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:18,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-26 19:53:18,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:53:18,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-26 19:53:18,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:18,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:53:18,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:18,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:53:18,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:18,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:18,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:18,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:18,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:18,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:18,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:18,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:18,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:18,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:18,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:18,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:18,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-10-26 19:53:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:18,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:18,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:18,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:18,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:18,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:18,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:18,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 1066 trivial. 0 not checked. [2020-10-26 19:53:18,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662969850] [2020-10-26 19:53:18,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:18,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:53:18,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7157702] [2020-10-26 19:53:18,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:53:18,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:18,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:53:18,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:53:18,607 INFO L87 Difference]: Start difference. First operand 182 states and 221 transitions. Second operand 23 states. [2020-10-26 19:53:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:19,307 INFO L93 Difference]: Finished difference Result 332 states and 416 transitions. [2020-10-26 19:53:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:53:19,307 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 179 [2020-10-26 19:53:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:19,310 INFO L225 Difference]: With dead ends: 332 [2020-10-26 19:53:19,310 INFO L226 Difference]: Without dead ends: 195 [2020-10-26 19:53:19,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:53:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-26 19:53:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 190. [2020-10-26 19:53:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-26 19:53:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 231 transitions. [2020-10-26 19:53:19,336 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 231 transitions. Word has length 179 [2020-10-26 19:53:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:19,336 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 231 transitions. [2020-10-26 19:53:19,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:53:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 231 transitions. [2020-10-26 19:53:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-26 19:53:19,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:19,339 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:19,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:53:19,339 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:19,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:19,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1026608110, now seen corresponding path program 17 times [2020-10-26 19:53:19,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:19,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887544423] [2020-10-26 19:53:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:19,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:19,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:24,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:24,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 19:53:24,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:24,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:53:24,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:24,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:53:24,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:24,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:53:24,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:24,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:24,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:24,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:24,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:24,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:24,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:24,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:24,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:24,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-26 19:53:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:24,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:24,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:24,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:24,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:24,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:24,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:24,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:24,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:24,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:24,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2020-10-26 19:53:24,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887544423] [2020-10-26 19:53:24,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:24,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:53:24,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614206628] [2020-10-26 19:53:24,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:53:24,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:24,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:53:24,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:53:24,886 INFO L87 Difference]: Start difference. First operand 190 states and 231 transitions. Second operand 24 states. [2020-10-26 19:53:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:25,489 INFO L93 Difference]: Finished difference Result 346 states and 434 transitions. [2020-10-26 19:53:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:53:25,489 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 187 [2020-10-26 19:53:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:25,491 INFO L225 Difference]: With dead ends: 346 [2020-10-26 19:53:25,491 INFO L226 Difference]: Without dead ends: 203 [2020-10-26 19:53:25,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:53:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-26 19:53:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2020-10-26 19:53:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-26 19:53:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 241 transitions. [2020-10-26 19:53:25,505 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 241 transitions. Word has length 187 [2020-10-26 19:53:25,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:25,505 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 241 transitions. [2020-10-26 19:53:25,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:53:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 241 transitions. [2020-10-26 19:53:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-26 19:53:25,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:25,507 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:25,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:53:25,507 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:25,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1343720247, now seen corresponding path program 18 times [2020-10-26 19:53:25,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:25,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446651255] [2020-10-26 19:53:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:25,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:25,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:25,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:30,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:30,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-26 19:53:30,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:53:30,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 19:53:30,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:53:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:30,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:53:30,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:31,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:31,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:31,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:31,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:31,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:31,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:31,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:31,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-26 19:53:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:31,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:31,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:31,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:31,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:31,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:31,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:31,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:31,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:31,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2020-10-26 19:53:31,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446651255] [2020-10-26 19:53:31,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:31,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:53:31,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838615967] [2020-10-26 19:53:31,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:53:31,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:31,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:53:31,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:53:31,111 INFO L87 Difference]: Start difference. First operand 198 states and 241 transitions. Second operand 25 states. [2020-10-26 19:53:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:31,855 INFO L93 Difference]: Finished difference Result 360 states and 452 transitions. [2020-10-26 19:53:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:53:31,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 195 [2020-10-26 19:53:31,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:31,857 INFO L225 Difference]: With dead ends: 360 [2020-10-26 19:53:31,857 INFO L226 Difference]: Without dead ends: 211 [2020-10-26 19:53:31,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:53:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-26 19:53:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 206. [2020-10-26 19:53:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-26 19:53:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 251 transitions. [2020-10-26 19:53:31,876 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 251 transitions. Word has length 195 [2020-10-26 19:53:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:31,876 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 251 transitions. [2020-10-26 19:53:31,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:53:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 251 transitions. [2020-10-26 19:53:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-26 19:53:31,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:31,879 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:31,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:53:31,879 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1169159982, now seen corresponding path program 19 times [2020-10-26 19:53:31,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:31,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107575423] [2020-10-26 19:53:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:31,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:36,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:36,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-26 19:53:36,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:36,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:53:36,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:53:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:53:36,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:37,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:37,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:37,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:37,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:37,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:37,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:37,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:37,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-10-26 19:53:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:37,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:37,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:37,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:37,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:37,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:37,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:37,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:37,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:37,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:37,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 1432 trivial. 0 not checked. [2020-10-26 19:53:37,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107575423] [2020-10-26 19:53:37,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:37,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:53:37,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240415374] [2020-10-26 19:53:37,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:53:37,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:37,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:53:37,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:53:37,597 INFO L87 Difference]: Start difference. First operand 206 states and 251 transitions. Second operand 26 states. [2020-10-26 19:53:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:38,398 INFO L93 Difference]: Finished difference Result 374 states and 470 transitions. [2020-10-26 19:53:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:53:38,399 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 203 [2020-10-26 19:53:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:38,402 INFO L225 Difference]: With dead ends: 374 [2020-10-26 19:53:38,402 INFO L226 Difference]: Without dead ends: 219 [2020-10-26 19:53:38,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:53:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-26 19:53:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 214. [2020-10-26 19:53:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-26 19:53:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 261 transitions. [2020-10-26 19:53:38,417 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 261 transitions. Word has length 203 [2020-10-26 19:53:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:38,418 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 261 transitions. [2020-10-26 19:53:38,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:53:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 261 transitions. [2020-10-26 19:53:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-26 19:53:38,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:38,419 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:38,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:53:38,420 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash 703015955, now seen corresponding path program 20 times [2020-10-26 19:53:38,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:38,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486049231] [2020-10-26 19:53:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:38,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:38,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:43,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:43,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-26 19:53:43,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:43,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5215 [2020-10-26 19:53:43,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:43,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:53:43,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:43,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:53:43,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:44,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:44,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:44,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:44,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:44,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:44,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:53:44,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:44,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:53:44,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-26 19:53:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:44,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:44,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:44,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:44,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:44,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:44,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:44,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:44,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:44,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:44,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2097 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 1566 trivial. 0 not checked. [2020-10-26 19:53:44,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486049231] [2020-10-26 19:53:44,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:44,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:53:44,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978841744] [2020-10-26 19:53:44,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:53:44,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:44,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:53:44,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:53:44,269 INFO L87 Difference]: Start difference. First operand 214 states and 261 transitions. Second operand 27 states. [2020-10-26 19:53:45,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:45,104 INFO L93 Difference]: Finished difference Result 388 states and 488 transitions. [2020-10-26 19:53:45,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:53:45,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 211 [2020-10-26 19:53:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:45,107 INFO L225 Difference]: With dead ends: 388 [2020-10-26 19:53:45,107 INFO L226 Difference]: Without dead ends: 227 [2020-10-26 19:53:45,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:53:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-26 19:53:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 222. [2020-10-26 19:53:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-26 19:53:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 271 transitions. [2020-10-26 19:53:45,125 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 271 transitions. Word has length 211 [2020-10-26 19:53:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:45,126 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 271 transitions. [2020-10-26 19:53:45,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:53:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 271 transitions. [2020-10-26 19:53:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-26 19:53:45,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:45,127 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:45,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:53:45,128 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:45,128 INFO L82 PathProgramCache]: Analyzing trace with hash -893292470, now seen corresponding path program 21 times [2020-10-26 19:53:45,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:45,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445091219] [2020-10-26 19:53:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:45,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:45,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:50,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:50,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 19:53:50,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:50,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5407 [2020-10-26 19:53:50,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:50,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:53:50,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:50,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:53:50,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:51,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:51,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:51,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:51,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:51,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:51,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:51,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:51,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:51,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:51,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:51,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:51,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-10-26 19:53:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:51,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:51,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:51,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:51,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:51,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:51,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:51,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:51,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:51,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2284 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 1706 trivial. 0 not checked. [2020-10-26 19:53:51,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445091219] [2020-10-26 19:53:51,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:51,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:53:51,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255216364] [2020-10-26 19:53:51,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:53:51,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:51,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:53:51,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:53:51,276 INFO L87 Difference]: Start difference. First operand 222 states and 271 transitions. Second operand 28 states. [2020-10-26 19:53:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:52,050 INFO L93 Difference]: Finished difference Result 402 states and 506 transitions. [2020-10-26 19:53:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:53:52,051 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 219 [2020-10-26 19:53:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:52,052 INFO L225 Difference]: With dead ends: 402 [2020-10-26 19:53:52,053 INFO L226 Difference]: Without dead ends: 235 [2020-10-26 19:53:52,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:53:52,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-26 19:53:52,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 230. [2020-10-26 19:53:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-26 19:53:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 281 transitions. [2020-10-26 19:53:52,068 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 281 transitions. Word has length 219 [2020-10-26 19:53:52,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:52,068 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 281 transitions. [2020-10-26 19:53:52,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:53:52,068 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 281 transitions. [2020-10-26 19:53:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-26 19:53:52,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:52,070 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:52,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:53:52,070 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:52,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:52,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1680018705, now seen corresponding path program 22 times [2020-10-26 19:53:52,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:52,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793772115] [2020-10-26 19:53:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:52,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:52,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:57,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:57,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-26 19:53:57,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:57,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-26 19:53:57,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:53:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:53:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:57,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:57,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:57,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:57,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:57,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:57,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:57,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-10-26 19:53:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:57,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:57,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:57,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:57,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:57,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:57,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:57,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:57,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:57,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:57,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2479 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 1852 trivial. 0 not checked. [2020-10-26 19:53:57,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793772115] [2020-10-26 19:53:57,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:57,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:53:57,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892241950] [2020-10-26 19:53:57,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:53:57,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:57,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:53:57,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:53:57,913 INFO L87 Difference]: Start difference. First operand 230 states and 281 transitions. Second operand 29 states. [2020-10-26 19:53:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:58,773 INFO L93 Difference]: Finished difference Result 416 states and 524 transitions. [2020-10-26 19:53:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:53:58,773 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 227 [2020-10-26 19:53:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:58,775 INFO L225 Difference]: With dead ends: 416 [2020-10-26 19:53:58,775 INFO L226 Difference]: Without dead ends: 243 [2020-10-26 19:53:58,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:53:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-26 19:53:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 238. [2020-10-26 19:53:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-26 19:53:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 291 transitions. [2020-10-26 19:53:58,793 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 291 transitions. Word has length 227 [2020-10-26 19:53:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:58,793 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 291 transitions. [2020-10-26 19:53:58,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:53:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 291 transitions. [2020-10-26 19:53:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-26 19:53:58,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:58,795 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:58,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:53:58,796 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash 291020646, now seen corresponding path program 23 times [2020-10-26 19:53:58,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:58,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183415326] [2020-10-26 19:53:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:58,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:59,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:04,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:04,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-26 19:54:04,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:04,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5417 [2020-10-26 19:54:04,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:04,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:54:04,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:04,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:54:04,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:04,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:04,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:04,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:04,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:04,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:04,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:54:04,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:04,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:04,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:04,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:04,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-26 19:54:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:04,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:04,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:04,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:04,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:04,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:04,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:04,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:04,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:04,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:04,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2682 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 2004 trivial. 0 not checked. [2020-10-26 19:54:04,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183415326] [2020-10-26 19:54:04,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:04,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:54:04,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760299029] [2020-10-26 19:54:04,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:54:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:54:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:54:04,992 INFO L87 Difference]: Start difference. First operand 238 states and 291 transitions. Second operand 30 states. [2020-10-26 19:54:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:05,720 INFO L93 Difference]: Finished difference Result 430 states and 542 transitions. [2020-10-26 19:54:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:54:05,721 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 235 [2020-10-26 19:54:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:05,723 INFO L225 Difference]: With dead ends: 430 [2020-10-26 19:54:05,723 INFO L226 Difference]: Without dead ends: 251 [2020-10-26 19:54:05,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:54:05,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-26 19:54:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 246. [2020-10-26 19:54:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-26 19:54:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 301 transitions. [2020-10-26 19:54:05,740 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 301 transitions. Word has length 235 [2020-10-26 19:54:05,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:05,740 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 301 transitions. [2020-10-26 19:54:05,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:54:05,740 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 301 transitions. [2020-10-26 19:54:05,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-26 19:54:05,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:05,742 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:05,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:54:05,743 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:05,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:05,743 INFO L82 PathProgramCache]: Analyzing trace with hash -10887221, now seen corresponding path program 24 times [2020-10-26 19:54:05,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:05,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306051124] [2020-10-26 19:54:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:05,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:05,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:10,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:10,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-26 19:54:10,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:10,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5159 [2020-10-26 19:54:10,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:10,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:54:10,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:10,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:54:10,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:11,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:11,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:11,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:11,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:11,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:11,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:11,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:11,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:11,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:11,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:11,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:11,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-10-26 19:54:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:11,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:11,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:11,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:11,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:11,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:11,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:11,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2893 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2020-10-26 19:54:11,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306051124] [2020-10-26 19:54:11,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:11,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:54:11,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114770574] [2020-10-26 19:54:11,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:54:11,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:54:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:54:11,696 INFO L87 Difference]: Start difference. First operand 246 states and 301 transitions. Second operand 31 states. [2020-10-26 19:54:12,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:12,536 INFO L93 Difference]: Finished difference Result 444 states and 560 transitions. [2020-10-26 19:54:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:54:12,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 243 [2020-10-26 19:54:12,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:12,539 INFO L225 Difference]: With dead ends: 444 [2020-10-26 19:54:12,539 INFO L226 Difference]: Without dead ends: 259 [2020-10-26 19:54:12,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:54:12,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-26 19:54:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 254. [2020-10-26 19:54:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-26 19:54:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 311 transitions. [2020-10-26 19:54:12,554 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 311 transitions. Word has length 243 [2020-10-26 19:54:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:12,554 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 311 transitions. [2020-10-26 19:54:12,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:54:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 311 transitions. [2020-10-26 19:54:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-26 19:54:12,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:12,556 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:12,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:54:12,557 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:12,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1261796222, now seen corresponding path program 25 times [2020-10-26 19:54:12,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:12,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134025971] [2020-10-26 19:54:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:12,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:12,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:17,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:17,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-26 19:54:17,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:17,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5272 [2020-10-26 19:54:17,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:54:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:54:17,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:18,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:18,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:18,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:18,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:18,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:18,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:18,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:18,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:18,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:18,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:18,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:18,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-10-26 19:54:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:18,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:18,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:18,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:18,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:18,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:54:18,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:18,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:18,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:18,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:18,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3112 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 2326 trivial. 0 not checked. [2020-10-26 19:54:18,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134025971] [2020-10-26 19:54:18,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:18,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:54:18,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365347061] [2020-10-26 19:54:18,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:54:18,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:18,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:54:18,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:54:18,686 INFO L87 Difference]: Start difference. First operand 254 states and 311 transitions. Second operand 32 states. [2020-10-26 19:54:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:19,662 INFO L93 Difference]: Finished difference Result 458 states and 578 transitions. [2020-10-26 19:54:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:54:19,663 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 251 [2020-10-26 19:54:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:19,666 INFO L225 Difference]: With dead ends: 458 [2020-10-26 19:54:19,666 INFO L226 Difference]: Without dead ends: 267 [2020-10-26 19:54:19,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:54:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-26 19:54:19,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 262. [2020-10-26 19:54:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-26 19:54:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 321 transitions. [2020-10-26 19:54:19,682 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 321 transitions. Word has length 251 [2020-10-26 19:54:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:19,682 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 321 transitions. [2020-10-26 19:54:19,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:54:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 321 transitions. [2020-10-26 19:54:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-26 19:54:19,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:19,684 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:19,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:54:19,685 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash 12513959, now seen corresponding path program 26 times [2020-10-26 19:54:19,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:19,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470192200] [2020-10-26 19:54:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:19,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:19,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:26,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 19:54:26,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:26,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6392 [2020-10-26 19:54:26,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:26,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:54:26,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:26,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:54:26,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:26,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:26,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:26,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:26,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:26,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:26,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:26,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:26,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:26,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-10-26 19:54:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:26,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:26,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:26,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:26,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:26,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:26,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:26,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:26,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:26,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3339 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 2496 trivial. 0 not checked. [2020-10-26 19:54:26,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470192200] [2020-10-26 19:54:26,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:26,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:54:26,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507147009] [2020-10-26 19:54:26,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:54:26,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:26,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:54:26,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:54:26,987 INFO L87 Difference]: Start difference. First operand 262 states and 321 transitions. Second operand 33 states. [2020-10-26 19:54:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:28,009 INFO L93 Difference]: Finished difference Result 472 states and 596 transitions. [2020-10-26 19:54:28,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:54:28,009 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 259 [2020-10-26 19:54:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:28,012 INFO L225 Difference]: With dead ends: 472 [2020-10-26 19:54:28,012 INFO L226 Difference]: Without dead ends: 275 [2020-10-26 19:54:28,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:54:28,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-26 19:54:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 270. [2020-10-26 19:54:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-26 19:54:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 331 transitions. [2020-10-26 19:54:28,028 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 331 transitions. Word has length 259 [2020-10-26 19:54:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:28,028 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 331 transitions. [2020-10-26 19:54:28,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:54:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 331 transitions. [2020-10-26 19:54:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-26 19:54:28,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:28,031 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:28,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:54:28,031 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:28,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1939071074, now seen corresponding path program 27 times [2020-10-26 19:54:28,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:28,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739732659] [2020-10-26 19:54:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:28,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:28,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:33,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:33,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-26 19:54:33,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:33,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5458 [2020-10-26 19:54:33,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:33,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:54:33,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:33,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:54:33,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:34,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:34,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:34,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:34,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:34,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:34,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:34,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:34,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:34,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2020-10-26 19:54:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:34,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:34,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:34,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:34,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:34,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:54:34,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:34,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:34,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:34,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3574 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2020-10-26 19:54:34,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739732659] [2020-10-26 19:54:34,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:34,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:54:34,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563271256] [2020-10-26 19:54:34,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:54:34,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:34,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:54:34,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:54:34,390 INFO L87 Difference]: Start difference. First operand 270 states and 331 transitions. Second operand 34 states. [2020-10-26 19:54:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:35,395 INFO L93 Difference]: Finished difference Result 486 states and 614 transitions. [2020-10-26 19:54:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:54:35,396 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 267 [2020-10-26 19:54:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:35,398 INFO L225 Difference]: With dead ends: 486 [2020-10-26 19:54:35,399 INFO L226 Difference]: Without dead ends: 283 [2020-10-26 19:54:35,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:54:35,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-26 19:54:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 278. [2020-10-26 19:54:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-26 19:54:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 341 transitions. [2020-10-26 19:54:35,414 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 341 transitions. Word has length 267 [2020-10-26 19:54:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:35,415 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 341 transitions. [2020-10-26 19:54:35,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:54:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 341 transitions. [2020-10-26 19:54:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-26 19:54:35,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:35,419 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:35,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:54:35,419 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1083364477, now seen corresponding path program 28 times [2020-10-26 19:54:35,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:35,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3345874] [2020-10-26 19:54:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:35,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:35,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:40,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:40,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 19:54:40,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:40,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5314 [2020-10-26 19:54:40,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:40,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:54:40,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:40,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:54:40,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:41,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:41,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:41,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:41,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:41,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:41,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:41,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:41,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:41,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2020-10-26 19:54:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:41,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:41,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:41,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:41,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:41,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:54:41,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:41,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 2854 trivial. 0 not checked. [2020-10-26 19:54:41,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3345874] [2020-10-26 19:54:41,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:41,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:54:41,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413615685] [2020-10-26 19:54:41,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:54:41,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:54:41,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:54:41,753 INFO L87 Difference]: Start difference. First operand 278 states and 341 transitions. Second operand 35 states. [2020-10-26 19:54:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:42,766 INFO L93 Difference]: Finished difference Result 500 states and 632 transitions. [2020-10-26 19:54:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:54:42,766 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 275 [2020-10-26 19:54:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:42,768 INFO L225 Difference]: With dead ends: 500 [2020-10-26 19:54:42,768 INFO L226 Difference]: Without dead ends: 291 [2020-10-26 19:54:42,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:54:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-26 19:54:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 286. [2020-10-26 19:54:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-26 19:54:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 351 transitions. [2020-10-26 19:54:42,785 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 351 transitions. Word has length 275 [2020-10-26 19:54:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:42,785 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 351 transitions. [2020-10-26 19:54:42,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:54:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 351 transitions. [2020-10-26 19:54:42,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-26 19:54:42,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:42,787 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:42,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:54:42,788 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash 194146490, now seen corresponding path program 29 times [2020-10-26 19:54:42,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:42,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103474639] [2020-10-26 19:54:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:43,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:48,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:48,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-26 19:54:48,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:48,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5341 [2020-10-26 19:54:48,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:54:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:54:48,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:49,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:49,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:49,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:49,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:49,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:49,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:49,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:49,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:49,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:49,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:49,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:49,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2020-10-26 19:54:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:49,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:49,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:49,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:49,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:49,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:49,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:49,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:49,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:49,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4068 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2020-10-26 19:54:49,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103474639] [2020-10-26 19:54:49,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:49,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:54:49,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67870898] [2020-10-26 19:54:49,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:54:49,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:54:49,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:54:49,258 INFO L87 Difference]: Start difference. First operand 286 states and 351 transitions. Second operand 36 states. [2020-10-26 19:54:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:50,238 INFO L93 Difference]: Finished difference Result 514 states and 650 transitions. [2020-10-26 19:54:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:54:50,239 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 283 [2020-10-26 19:54:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:50,241 INFO L225 Difference]: With dead ends: 514 [2020-10-26 19:54:50,241 INFO L226 Difference]: Without dead ends: 299 [2020-10-26 19:54:50,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:54:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-26 19:54:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 294. [2020-10-26 19:54:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-26 19:54:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 361 transitions. [2020-10-26 19:54:50,259 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 361 transitions. Word has length 283 [2020-10-26 19:54:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:50,259 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 361 transitions. [2020-10-26 19:54:50,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:54:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 361 transitions. [2020-10-26 19:54:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-26 19:54:50,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:50,262 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:50,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:54:50,262 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:50,263 INFO L82 PathProgramCache]: Analyzing trace with hash -305821089, now seen corresponding path program 30 times [2020-10-26 19:54:50,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:50,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928533555] [2020-10-26 19:54:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:50,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:50,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:56,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:56,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-26 19:54:56,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5670 [2020-10-26 19:54:56,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:54:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:54:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:56,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:56,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:56,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:56,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:56,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:56,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:56,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:56,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:56,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:56,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:56,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:56,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-10-26 19:54:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:56,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:56,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:56,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:56,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:56,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:54:56,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:56,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:56,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:56,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:56,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4327 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 3236 trivial. 0 not checked. [2020-10-26 19:54:57,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928533555] [2020-10-26 19:54:57,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:57,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:54:57,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939897754] [2020-10-26 19:54:57,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:54:57,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:57,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:54:57,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:54:57,032 INFO L87 Difference]: Start difference. First operand 294 states and 361 transitions. Second operand 37 states. [2020-10-26 19:54:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:58,022 INFO L93 Difference]: Finished difference Result 528 states and 668 transitions. [2020-10-26 19:54:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:54:58,022 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 291 [2020-10-26 19:54:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:58,025 INFO L225 Difference]: With dead ends: 528 [2020-10-26 19:54:58,025 INFO L226 Difference]: Without dead ends: 307 [2020-10-26 19:54:58,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:54:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-26 19:54:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 302. [2020-10-26 19:54:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-26 19:54:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 371 transitions. [2020-10-26 19:54:58,042 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 371 transitions. Word has length 291 [2020-10-26 19:54:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:58,043 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 371 transitions. [2020-10-26 19:54:58,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:54:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 371 transitions. [2020-10-26 19:54:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-26 19:54:58,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:58,045 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:58,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:54:58,045 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1584236586, now seen corresponding path program 31 times [2020-10-26 19:54:58,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:58,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998068827] [2020-10-26 19:54:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:58,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:03,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:03,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-26 19:55:03,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:55:03,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5583 [2020-10-26 19:55:03,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:55:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:55:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:55:03,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:55:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:04,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:04,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:04,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:55:04,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:04,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:55:04,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:55:04,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:04,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:04,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 285 [2020-10-26 19:55:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:04,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:04,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:55:04,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:55:04,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:55:04,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:55:04,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:55:04,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:55:04,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:55:04,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:55:04,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:55:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4594 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 3436 trivial. 0 not checked. [2020-10-26 19:55:04,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998068827] [2020-10-26 19:55:04,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:55:04,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:55:04,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911410004] [2020-10-26 19:55:04,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:55:04,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:55:04,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:55:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:55:04,749 INFO L87 Difference]: Start difference. First operand 302 states and 371 transitions. Second operand 38 states. [2020-10-26 19:55:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:55:05,889 INFO L93 Difference]: Finished difference Result 542 states and 686 transitions. [2020-10-26 19:55:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:55:05,890 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 299 [2020-10-26 19:55:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:55:05,892 INFO L225 Difference]: With dead ends: 542 [2020-10-26 19:55:05,892 INFO L226 Difference]: Without dead ends: 315 [2020-10-26 19:55:05,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:55:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-26 19:55:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 310. [2020-10-26 19:55:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-26 19:55:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 381 transitions. [2020-10-26 19:55:05,910 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 381 transitions. Word has length 299 [2020-10-26 19:55:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:55:05,910 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 381 transitions. [2020-10-26 19:55:05,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:55:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 381 transitions. [2020-10-26 19:55:05,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-26 19:55:05,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:55:05,912 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:55:05,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:55:05,913 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:55:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:55:05,913 INFO L82 PathProgramCache]: Analyzing trace with hash -248967365, now seen corresponding path program 32 times [2020-10-26 19:55:05,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:55:05,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105090421] [2020-10-26 19:55:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:55:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:55:06,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:55:06,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking...