/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:34:08,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:34:08,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:34:08,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:34:08,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:34:08,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:34:08,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:34:08,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:34:08,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:34:08,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:34:08,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:34:08,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:34:08,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:34:08,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:34:08,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:34:08,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:34:08,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:34:08,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:34:08,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:34:08,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:34:08,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:34:08,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:34:08,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:34:08,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:34:08,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:34:08,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:34:08,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:34:08,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:34:08,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:34:08,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:34:08,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:34:08,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:34:08,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:34:08,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:34:08,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:34:08,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:34:08,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:34:08,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:34:08,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:34:08,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:34:08,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:34:08,485 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 [2020-10-29 09:34:08,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:34:08,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:34:08,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:34:08,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:34:08,543 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:34:08,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:34:08,544 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:34:08,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:34:08,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:34:08,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:34:08,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:34:08,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:34:08,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:34:08,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:34:08,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:34:08,547 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:34:08,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:34:08,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:34:08,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:34:08,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:34:08,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:34:08,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:34:08,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:34:08,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:34:08,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:34:08,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:34:08,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:34:08,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:34:08,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:34:08,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:34:09,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:34:09,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:34:09,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:34:09,076 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:34:09,077 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:34:09,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2020-10-29 09:34:09,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ea7eacf3/087a9276c44f4885b32f8a1dad25cf32/FLAG84fe8984a [2020-10-29 09:34:09,935 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:34:09,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_4.i [2020-10-29 09:34:09,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ea7eacf3/087a9276c44f4885b32f8a1dad25cf32/FLAG84fe8984a [2020-10-29 09:34:10,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ea7eacf3/087a9276c44f4885b32f8a1dad25cf32 [2020-10-29 09:34:10,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:34:10,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:34:10,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:34:10,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:34:10,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:34:10,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:34:10" (1/1) ... [2020-10-29 09:34:10,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e78fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10, skipping insertion in model container [2020-10-29 09:34:10,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:34:10" (1/1) ... [2020-10-29 09:34:10,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:34:10,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:34:10,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:34:10,569 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:34:10,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:34:10,609 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:34:10,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10 WrapperNode [2020-10-29 09:34:10,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:34:10,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:34:10,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:34:10,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:34:10,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10" (1/1) ... [2020-10-29 09:34:10,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10" (1/1) ... [2020-10-29 09:34:10,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10" (1/1) ... [2020-10-29 09:34:10,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10" (1/1) ... [2020-10-29 09:34:10,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10" (1/1) ... [2020-10-29 09:34:10,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10" (1/1) ... [2020-10-29 09:34:10,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10" (1/1) ... [2020-10-29 09:34:10,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:34:10,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:34:10,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:34:10,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:34:10,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10" (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 [2020-10-29 09:34:10,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:34:10,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:34:10,744 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:34:10,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:34:10,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:34:10,745 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:34:10,745 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:34:10,745 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:34:10,745 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:34:10,745 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:34:10,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:34:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:34:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:34:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:34:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:34:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:34:10,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:34:10,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:34:10,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:34:10,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:34:11,072 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:34:11,072 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:34:11,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:34:11 BoogieIcfgContainer [2020-10-29 09:34:11,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:34:11,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:34:11,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:34:11,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:34:11,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:34:10" (1/3) ... [2020-10-29 09:34:11,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f8e836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:34:11, skipping insertion in model container [2020-10-29 09:34:11,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:34:10" (2/3) ... [2020-10-29 09:34:11,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f8e836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:34:11, skipping insertion in model container [2020-10-29 09:34:11,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:34:11" (3/3) ... [2020-10-29 09:34:11,086 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2020-10-29 09:34:11,101 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:34:11,107 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:34:11,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:34:11,158 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:34:11,159 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:34:11,159 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:34:11,159 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:34:11,159 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:34:11,159 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:34:11,160 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:34:11,160 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:34:11,204 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-29 09:34:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:34:11,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:11,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:11,216 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:11,233 INFO L82 PathProgramCache]: Analyzing trace with hash 385493721, now seen corresponding path program 1 times [2020-10-29 09:34:11,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:11,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361839177] [2020-10-29 09:34:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:11,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:11,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:11,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:11,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:11,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:34:11,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:34:11,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-29 09:34:11,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:11,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:11,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:34:11,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:34:11,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:34:11,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:34:12,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:12,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:12,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:12,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:12,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:12,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:34:12,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:12,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:12,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:12,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:12,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:12,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:34:12,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361839177] [2020-10-29 09:34:12,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:34:12,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:34:12,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273853115] [2020-10-29 09:34:12,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:34:12,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:34:12,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:34:12,181 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-10-29 09:34:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:12,425 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2020-10-29 09:34:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:34:12,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-29 09:34:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:12,435 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:34:12,436 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:34:12,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:34:12,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:34:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-29 09:34:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:34:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-29 09:34:12,488 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2020-10-29 09:34:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:12,489 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-29 09:34:12,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:34:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-29 09:34:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:34:12,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:12,490 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:12,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:34:12,491 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:12,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:12,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1644935087, now seen corresponding path program 1 times [2020-10-29 09:34:12,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:12,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630495666] [2020-10-29 09:34:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:12,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:12,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:12,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:12,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:34:12,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:12,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-29 09:34:12,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:12,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:12,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:34:12,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:34:12,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:34:12,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:34:12,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:12,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:12,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:12,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:12,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:12,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:34:12,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:12,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:12,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:12,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:34:12,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630495666] [2020-10-29 09:34:12,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:12,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:34:12,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438711414] [2020-10-29 09:34:12,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:34:12,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:12,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:34:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:34:12,974 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-29 09:34:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:13,158 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-29 09:34:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:34:13,159 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-29 09:34:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:13,161 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:34:13,161 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:34:13,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:34:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:34:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-29 09:34:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:34:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-29 09:34:13,171 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2020-10-29 09:34:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:13,171 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-29 09:34:13,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:34:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-29 09:34:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:34:13,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:13,173 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:13,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:34:13,174 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:13,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:13,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1673697374, now seen corresponding path program 1 times [2020-10-29 09:34:13,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:13,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409402056] [2020-10-29 09:34:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:13,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:13,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:13,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:13,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:34:13,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:13,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-29 09:34:13,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:13,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:13,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:34:13,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:34:13,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:34:13,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:13,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:13,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:13,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:13,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:13,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:13,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:34:13,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:13,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:13,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:13,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:13,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:13,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:34:13,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409402056] [2020-10-29 09:34:13,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:13,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:34:13,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621652347] [2020-10-29 09:34:13,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:34:13,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:13,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:34:13,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:34:13,683 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-10-29 09:34:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:13,869 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-29 09:34:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:34:13,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-29 09:34:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:13,871 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:34:13,871 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 09:34:13,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:34:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 09:34:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-29 09:34:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:34:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-29 09:34:13,880 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2020-10-29 09:34:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:13,880 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-29 09:34:13,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:34:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-29 09:34:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:34:13,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:13,882 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:13,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:34:13,882 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:13,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1308779433, now seen corresponding path program 2 times [2020-10-29 09:34:13,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:13,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061965708] [2020-10-29 09:34:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:13,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:13,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:14,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:14,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:34:14,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:14,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-29 09:34:14,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:14,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:14,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:34:14,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:34:14,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:34:14,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:14,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:14,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:14,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:14,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:14,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:14,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:34:14,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:14,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:14,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:34:14,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061965708] [2020-10-29 09:34:14,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:14,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:34:14,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645651258] [2020-10-29 09:34:14,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:34:14,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:14,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:34:14,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:34:14,790 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2020-10-29 09:34:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:14,956 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-10-29 09:34:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:34:14,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-29 09:34:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:14,958 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:34:14,958 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:34:14,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:34:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:34:14,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-29 09:34:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:34:14,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-29 09:34:14,966 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-29 09:34:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:14,967 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-29 09:34:14,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:34:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-29 09:34:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:34:14,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:14,968 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:14,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:34:14,969 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:14,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1669828828, now seen corresponding path program 3 times [2020-10-29 09:34:14,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:14,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530691997] [2020-10-29 09:34:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:14,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:15,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:15,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:15,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:34:15,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:15,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-29 09:34:15,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:15,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:34:15,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:34:15,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:34:15,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:16,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:16,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:16,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:16,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:16,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:16,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:34:16,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:16,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:16,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:16,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:16,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:16,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 09:34:16,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530691997] [2020-10-29 09:34:16,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:16,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:34:16,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904760639] [2020-10-29 09:34:16,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:34:16,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:16,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:34:16,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:34:16,169 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 10 states. [2020-10-29 09:34:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:16,406 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-29 09:34:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:34:16,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-29 09:34:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:16,408 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:34:16,409 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:34:16,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:34:16,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:34:16,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-29 09:34:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:34:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-29 09:34:16,422 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-29 09:34:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:16,426 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-29 09:34:16,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:34:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-29 09:34:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:34:16,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:16,427 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:16,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:34:16,428 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1898614297, now seen corresponding path program 4 times [2020-10-29 09:34:16,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:16,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587653769] [2020-10-29 09:34:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:16,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:16,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:17,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:17,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:34:17,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:17,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1234 [2020-10-29 09:34:17,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:17,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:17,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:34:17,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:34:17,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:34:17,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:17,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:17,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:17,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:17,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:17,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:17,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:34:17,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:17,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:17,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:17,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:17,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:17,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 09:34:17,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587653769] [2020-10-29 09:34:17,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:17,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:34:17,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651897737] [2020-10-29 09:34:17,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:34:17,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:17,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:34:17,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:34:17,844 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 11 states. [2020-10-29 09:34:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:18,082 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-10-29 09:34:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:34:18,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-29 09:34:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:18,085 INFO L225 Difference]: With dead ends: 77 [2020-10-29 09:34:18,085 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:34:18,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:34:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:34:18,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-29 09:34:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:34:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-29 09:34:18,096 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 39 [2020-10-29 09:34:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:18,097 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-29 09:34:18,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:34:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-29 09:34:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:34:18,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:18,098 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:18,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:34:18,099 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:18,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1061869448, now seen corresponding path program 5 times [2020-10-29 09:34:18,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:18,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923759236] [2020-10-29 09:34:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:18,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:18,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:20,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:20,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:34:20,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:20,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2081 [2020-10-29 09:34:20,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:20,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:20,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:34:20,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 09:34:20,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:34:20,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:20,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:20,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:20,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:20,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:20,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:20,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:20,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:20,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-29 09:34:20,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923759236] [2020-10-29 09:34:20,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:20,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:34:20,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945540914] [2020-10-29 09:34:20,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:34:20,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:34:20,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:34:20,377 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 12 states. [2020-10-29 09:34:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:20,619 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2020-10-29 09:34:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:34:20,619 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-29 09:34:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:20,623 INFO L225 Difference]: With dead ends: 85 [2020-10-29 09:34:20,623 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:34:20,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:34:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:34:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-29 09:34:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:34:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-29 09:34:20,632 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2020-10-29 09:34:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:20,633 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-29 09:34:20,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:34:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-29 09:34:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:34:20,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:20,634 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:20,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:34:20,634 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:20,635 INFO L82 PathProgramCache]: Analyzing trace with hash -194837791, now seen corresponding path program 6 times [2020-10-29 09:34:20,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:20,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718107412] [2020-10-29 09:34:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:20,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:20,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:22,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:22,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:34:22,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:22,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1629 [2020-10-29 09:34:22,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:22,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:34:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 09:34:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:34:22,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:22,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:22,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:22,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:22,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:22,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:22,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:34:22,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:22,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:22,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:22,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:22,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:22,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-29 09:34:22,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718107412] [2020-10-29 09:34:22,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:22,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:34:22,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681747566] [2020-10-29 09:34:22,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:34:22,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:34:22,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:34:22,480 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 13 states. [2020-10-29 09:34:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:22,713 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-10-29 09:34:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:34:22,713 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-29 09:34:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:22,715 INFO L225 Difference]: With dead ends: 93 [2020-10-29 09:34:22,715 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:34:22,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:34:22,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:34:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-29 09:34:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:34:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-29 09:34:22,729 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2020-10-29 09:34:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:22,730 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-29 09:34:22,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:34:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-29 09:34:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:34:22,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:22,733 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:22,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:34:22,734 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:22,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:22,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2143936532, now seen corresponding path program 7 times [2020-10-29 09:34:22,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:22,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458117359] [2020-10-29 09:34:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:22,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:22,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:24,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:24,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:34:24,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:24,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2058 [2020-10-29 09:34:24,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:24,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:24,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:34:24,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 09:34:24,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:34:24,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:25,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:25,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:25,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:25,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:25,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:25,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:25,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:25,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-29 09:34:25,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458117359] [2020-10-29 09:34:25,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:25,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:34:25,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807418326] [2020-10-29 09:34:25,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:34:25,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:25,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:34:25,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:34:25,060 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2020-10-29 09:34:25,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:25,286 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-29 09:34:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:34:25,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-29 09:34:25,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:25,288 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:34:25,288 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:34:25,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:34:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:34:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-29 09:34:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:34:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-29 09:34:25,305 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2020-10-29 09:34:25,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:25,305 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-29 09:34:25,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:34:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-29 09:34:25,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:34:25,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:25,307 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:25,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:34:25,308 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash 106212383, now seen corresponding path program 8 times [2020-10-29 09:34:25,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:25,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760471509] [2020-10-29 09:34:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:25,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:25,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:28,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:28,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:34:28,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:28,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3570 [2020-10-29 09:34:28,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:28,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:34:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 09:34:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:34:28,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:29,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:29,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:29,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:29,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:29,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:29,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:34:29,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:29,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:29,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-29 09:34:29,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760471509] [2020-10-29 09:34:29,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:29,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:34:29,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911901035] [2020-10-29 09:34:29,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:34:29,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:29,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:34:29,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:34:29,146 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2020-10-29 09:34:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:29,422 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2020-10-29 09:34:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:34:29,423 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-29 09:34:29,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:29,423 INFO L225 Difference]: With dead ends: 109 [2020-10-29 09:34:29,424 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:34:29,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:34:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:34:29,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-29 09:34:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:34:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-29 09:34:29,432 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 59 [2020-10-29 09:34:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:29,433 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-29 09:34:29,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:34:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-29 09:34:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:34:29,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:29,434 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:29,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:34:29,434 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:29,435 INFO L82 PathProgramCache]: Analyzing trace with hash 518293584, now seen corresponding path program 9 times [2020-10-29 09:34:29,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:29,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368477874] [2020-10-29 09:34:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:29,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:29,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:34,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:34,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:34:34,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:34,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 09:34:34,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:34,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:34,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:34:34,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 09:34:34,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:34:34,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:34,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:34,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:34,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:34,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:34,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:34,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:34:34,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:34,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:34,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-29 09:34:34,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368477874] [2020-10-29 09:34:34,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:34,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:34:34,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641452962] [2020-10-29 09:34:34,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:34:34,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:34,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:34:34,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:34:34,695 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 16 states. [2020-10-29 09:34:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:35,094 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-29 09:34:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:34:35,096 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-29 09:34:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:35,097 INFO L225 Difference]: With dead ends: 117 [2020-10-29 09:34:35,097 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:34:35,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:34:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:34:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-29 09:34:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:34:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-29 09:34:35,108 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2020-10-29 09:34:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:35,108 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-29 09:34:35,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:34:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-29 09:34:35,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 09:34:35,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:35,109 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:35,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:34:35,110 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:35,110 INFO L82 PathProgramCache]: Analyzing trace with hash 21733913, now seen corresponding path program 10 times [2020-10-29 09:34:35,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:35,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338267378] [2020-10-29 09:34:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:35,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:35,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:38,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:38,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 09:34:38,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:38,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3402 [2020-10-29 09:34:38,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:38,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:38,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:34:38,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-29 09:34:38,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:34:38,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:38,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:38,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:38,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:38,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:38,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:38,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:38,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:38,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:38,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:38,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-29 09:34:38,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338267378] [2020-10-29 09:34:38,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:38,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:34:38,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530703756] [2020-10-29 09:34:38,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:34:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:34:38,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:34:38,797 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2020-10-29 09:34:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:39,151 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2020-10-29 09:34:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:34:39,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-29 09:34:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:39,153 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:34:39,153 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:34:39,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:34:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:34:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-29 09:34:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:34:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-29 09:34:39,161 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2020-10-29 09:34:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:39,162 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-29 09:34:39,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:34:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-29 09:34:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 09:34:39,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:39,163 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:39,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:34:39,163 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash 276844724, now seen corresponding path program 11 times [2020-10-29 09:34:39,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:39,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447814164] [2020-10-29 09:34:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:39,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:39,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:42,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:42,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 09:34:42,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:42,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3490 [2020-10-29 09:34:42,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:42,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:42,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:34:42,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-29 09:34:42,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:34:42,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:42,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:42,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:42,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:42,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:42,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:42,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:34:42,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:42,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:42,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-29 09:34:42,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447814164] [2020-10-29 09:34:42,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:42,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:34:42,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680613001] [2020-10-29 09:34:42,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:34:42,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:34:43,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:34:43,002 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 18 states. [2020-10-29 09:34:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:43,385 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2020-10-29 09:34:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:34:43,386 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-29 09:34:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:43,387 INFO L225 Difference]: With dead ends: 133 [2020-10-29 09:34:43,387 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:34:43,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:34:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:34:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-29 09:34:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:34:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-29 09:34:43,406 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-10-29 09:34:43,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:43,407 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-29 09:34:43,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:34:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-29 09:34:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 09:34:43,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:43,413 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:43,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:34:43,414 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash 892948917, now seen corresponding path program 12 times [2020-10-29 09:34:43,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:43,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584979216] [2020-10-29 09:34:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:43,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:43,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:47,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:47,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 09:34:47,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:47,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4230 [2020-10-29 09:34:47,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:47,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:47,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:34:47,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-29 09:34:47,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:34:47,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:47,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:47,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:47,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:47,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:47,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:47,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:34:47,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:47,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:47,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-29 09:34:47,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584979216] [2020-10-29 09:34:47,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:47,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:34:47,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598471953] [2020-10-29 09:34:47,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:34:47,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:34:47,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:34:47,997 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 19 states. [2020-10-29 09:34:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:48,373 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2020-10-29 09:34:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:34:48,374 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-29 09:34:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:48,375 INFO L225 Difference]: With dead ends: 141 [2020-10-29 09:34:48,376 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 09:34:48,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:34:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 09:34:48,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-29 09:34:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 09:34:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-29 09:34:48,395 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2020-10-29 09:34:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:48,396 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-29 09:34:48,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:34:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-29 09:34:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 09:34:48,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:48,401 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:48,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:34:48,402 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1672722712, now seen corresponding path program 13 times [2020-10-29 09:34:48,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:48,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706454693] [2020-10-29 09:34:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:48,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:48,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:53,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:53,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 09:34:53,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4734 [2020-10-29 09:34:53,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:53,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:34:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-29 09:34:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:34:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:53,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:53,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:53,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:53,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:53,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:53,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:34:53,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:53,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:53,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:53,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 09:34:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-29 09:34:53,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706454693] [2020-10-29 09:34:53,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:53,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:34:53,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630048602] [2020-10-29 09:34:53,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:34:53,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:53,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:34:53,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:34:53,548 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 20 states. [2020-10-29 09:34:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:53,873 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-29 09:34:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:34:53,874 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2020-10-29 09:34:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:53,875 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:34:53,875 INFO L226 Difference]: Without dead ends: 94 [2020-10-29 09:34:53,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:34:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-29 09:34:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-29 09:34:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 09:34:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-29 09:34:53,885 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2020-10-29 09:34:53,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:53,887 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-29 09:34:53,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:34:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-29 09:34:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-29 09:34:53,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:53,888 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:53,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:34:53,889 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:53,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1532523379, now seen corresponding path program 14 times [2020-10-29 09:34:53,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:53,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784580079] [2020-10-29 09:34:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:53,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:54,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:58,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:58,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-29 09:34:58,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:58,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4369 [2020-10-29 09:34:58,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:58,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:58,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:34:58,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-29 09:34:58,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 09:34:58,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:58,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:58,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:58,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:58,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:58,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:58,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:58,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:58,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-29 09:34:58,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784580079] [2020-10-29 09:34:58,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:58,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:34:58,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466026888] [2020-10-29 09:34:58,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:34:58,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:34:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:34:58,657 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 21 states. [2020-10-29 09:34:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:59,010 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2020-10-29 09:34:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:34:59,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-10-29 09:34:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:59,013 INFO L225 Difference]: With dead ends: 157 [2020-10-29 09:34:59,013 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:34:59,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:34:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:34:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-29 09:34:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:34:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-29 09:34:59,021 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 89 [2020-10-29 09:34:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:59,022 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-29 09:34:59,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:34:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-29 09:34:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 09:34:59,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:59,023 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:59,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:34:59,023 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:59,024 INFO L82 PathProgramCache]: Analyzing trace with hash 615055740, now seen corresponding path program 15 times [2020-10-29 09:34:59,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:59,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879912664] [2020-10-29 09:34:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:59,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:59,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:04,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:04,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 09:35:04,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:04,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 09:35:04,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:04,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:35:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-29 09:35:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:35:04,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:04,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:04,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:04,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:04,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:04,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:04,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:04,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:04,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:04,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:04,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:04,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:04,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-29 09:35:04,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879912664] [2020-10-29 09:35:04,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:04,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:35:04,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412014163] [2020-10-29 09:35:04,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:35:04,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:04,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:35:04,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:35:04,394 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 22 states. [2020-10-29 09:35:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:04,755 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2020-10-29 09:35:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:35:04,755 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2020-10-29 09:35:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:04,757 INFO L225 Difference]: With dead ends: 165 [2020-10-29 09:35:04,757 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:35:04,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:35:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:35:04,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-29 09:35:04,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-29 09:35:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-29 09:35:04,763 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2020-10-29 09:35:04,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:04,764 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-29 09:35:04,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:35:04,764 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-29 09:35:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 09:35:04,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:04,765 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:04,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:35:04,765 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:04,766 INFO L82 PathProgramCache]: Analyzing trace with hash -9162515, now seen corresponding path program 16 times [2020-10-29 09:35:04,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:04,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130051587] [2020-10-29 09:35:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:04,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:05,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:09,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:09,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-29 09:35:09,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:09,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:35:09,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:09,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:09,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:35:09,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-29 09:35:09,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:35:09,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:10,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:10,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:10,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:10,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:10,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:10,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:10,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:10,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:10,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:10,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:10,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:10,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-29 09:35:10,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130051587] [2020-10-29 09:35:10,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:10,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:35:10,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489790509] [2020-10-29 09:35:10,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:35:10,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:10,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:35:10,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:35:10,219 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 23 states. [2020-10-29 09:35:10,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:10,580 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2020-10-29 09:35:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:35:10,581 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-10-29 09:35:10,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:10,582 INFO L225 Difference]: With dead ends: 173 [2020-10-29 09:35:10,582 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:35:10,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:35:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:35:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-29 09:35:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:35:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-29 09:35:10,591 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2020-10-29 09:35:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:10,591 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-29 09:35:10,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:35:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-29 09:35:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-29 09:35:10,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:10,593 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:10,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:35:10,593 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1091201504, now seen corresponding path program 17 times [2020-10-29 09:35:10,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:10,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974876626] [2020-10-29 09:35:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:10,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:11,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:15,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:15,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-29 09:35:15,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:15,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 09:35:15,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:15,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:15,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:35:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-29 09:35:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 09:35:15,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:16,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:16,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:16,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:16,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:16,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:16,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:16,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:16,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:16,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-29 09:35:16,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974876626] [2020-10-29 09:35:16,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:16,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:35:16,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229078505] [2020-10-29 09:35:16,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:35:16,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:16,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:35:16,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:35:16,070 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 24 states. [2020-10-29 09:35:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:16,463 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2020-10-29 09:35:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:35:16,464 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2020-10-29 09:35:16,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:16,465 INFO L225 Difference]: With dead ends: 181 [2020-10-29 09:35:16,465 INFO L226 Difference]: Without dead ends: 114 [2020-10-29 09:35:16,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:35:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-29 09:35:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-29 09:35:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-29 09:35:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-29 09:35:16,473 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 106 [2020-10-29 09:35:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:16,473 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-29 09:35:16,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:35:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-29 09:35:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 09:35:16,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:16,474 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:16,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:35:16,475 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:16,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1097654409, now seen corresponding path program 18 times [2020-10-29 09:35:16,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:16,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009423745] [2020-10-29 09:35:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:16,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:16,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:21,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:21,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 09:35:21,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:21,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 09:35:21,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:21,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:21,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:35:21,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-29 09:35:21,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 09:35:21,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:21,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:21,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:21,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:21,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:21,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:21,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:21,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:21,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:21,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:21,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:21,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:21,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-29 09:35:21,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009423745] [2020-10-29 09:35:21,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:21,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:35:21,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058267707] [2020-10-29 09:35:21,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:35:21,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:21,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:35:21,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:35:21,986 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 25 states. [2020-10-29 09:35:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:22,386 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2020-10-29 09:35:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:35:22,386 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2020-10-29 09:35:22,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:22,388 INFO L225 Difference]: With dead ends: 189 [2020-10-29 09:35:22,388 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 09:35:22,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:35:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 09:35:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-29 09:35:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 09:35:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-29 09:35:22,395 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 111 [2020-10-29 09:35:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:22,395 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-29 09:35:22,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:35:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-29 09:35:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-29 09:35:22,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:22,397 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:22,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:35:22,397 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1812083268, now seen corresponding path program 19 times [2020-10-29 09:35:22,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:22,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604981813] [2020-10-29 09:35:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:22,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:27,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:27,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-29 09:35:27,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:27,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:35:27,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:27,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:27,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:35:27,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-29 09:35:27,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 09:35:27,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:27,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:27,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:27,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:27,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:27,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:27,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:27,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:27,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:27,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:27,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:27,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:27,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-29 09:35:27,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604981813] [2020-10-29 09:35:27,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:27,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:35:27,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361593844] [2020-10-29 09:35:27,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:35:27,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:27,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:35:27,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:35:27,903 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 26 states. [2020-10-29 09:35:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:28,301 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2020-10-29 09:35:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:35:28,302 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 116 [2020-10-29 09:35:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:28,304 INFO L225 Difference]: With dead ends: 197 [2020-10-29 09:35:28,304 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 09:35:28,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:35:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 09:35:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-29 09:35:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:35:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-29 09:35:28,311 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 116 [2020-10-29 09:35:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:28,311 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-29 09:35:28,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:35:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-29 09:35:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-29 09:35:28,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:28,313 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:28,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:35:28,313 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:28,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1712713691, now seen corresponding path program 20 times [2020-10-29 09:35:28,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:28,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349064152] [2020-10-29 09:35:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:28,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:28,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:33,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:33,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-29 09:35:33,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:33,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 09:35:33,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:33,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:33,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:35:33,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-29 09:35:33,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 09:35:33,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:33,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:33,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:33,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:33,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:33,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:33,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:33,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:33,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-29 09:35:33,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349064152] [2020-10-29 09:35:33,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:33,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:35:33,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125773980] [2020-10-29 09:35:33,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:35:33,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:33,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:35:33,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:35:33,886 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 27 states. [2020-10-29 09:35:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:34,300 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2020-10-29 09:35:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:35:34,304 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-10-29 09:35:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:34,305 INFO L225 Difference]: With dead ends: 205 [2020-10-29 09:35:34,305 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 09:35:34,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:35:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 09:35:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-29 09:35:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:35:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-29 09:35:34,312 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 121 [2020-10-29 09:35:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:34,313 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-29 09:35:34,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:35:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-29 09:35:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-29 09:35:34,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:34,314 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:34,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:35:34,315 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:34,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:34,315 INFO L82 PathProgramCache]: Analyzing trace with hash 37395112, now seen corresponding path program 21 times [2020-10-29 09:35:34,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:34,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056776023] [2020-10-29 09:35:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:34,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:35,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:39,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:39,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-29 09:35:39,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:39,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 09:35:39,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:39,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:39,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:35:39,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-29 09:35:39,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 09:35:39,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:39,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:39,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:39,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:39,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:39,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:39,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:35:39,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:39,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:39,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:39,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:39,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:39,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-29 09:35:39,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056776023] [2020-10-29 09:35:39,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:39,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:35:39,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751318138] [2020-10-29 09:35:39,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:35:39,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:39,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:35:39,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:35:39,963 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 28 states. [2020-10-29 09:35:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:40,358 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2020-10-29 09:35:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:35:40,366 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 126 [2020-10-29 09:35:40,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:40,367 INFO L225 Difference]: With dead ends: 141 [2020-10-29 09:35:40,367 INFO L226 Difference]: Without dead ends: 134 [2020-10-29 09:35:40,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:35:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-29 09:35:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2020-10-29 09:35:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-29 09:35:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-10-29 09:35:40,377 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 126 [2020-10-29 09:35:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:40,377 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-10-29 09:35:40,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:35:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-10-29 09:35:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-29 09:35:40,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:40,380 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:40,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:35:40,380 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1302030307, now seen corresponding path program 22 times [2020-10-29 09:35:40,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:40,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201562881] [2020-10-29 09:35:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:40,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:41,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:45,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:45,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-29 09:35:45,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:45,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 09:35:45,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:45,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:45,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:35:45,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-29 09:35:45,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 09:35:45,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:45,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:45,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:45,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:45,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:45,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:45,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:45,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:45,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:45,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-29 09:35:46,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201562881] [2020-10-29 09:35:46,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:46,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:35:46,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704270077] [2020-10-29 09:35:46,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:35:46,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:35:46,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:35:46,016 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 29 states. [2020-10-29 09:35:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:46,498 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-10-29 09:35:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:35:46,499 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-10-29 09:35:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:46,500 INFO L225 Difference]: With dead ends: 221 [2020-10-29 09:35:46,500 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:35:46,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:35:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:35:46,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-29 09:35:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 09:35:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-29 09:35:46,508 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 129 [2020-10-29 09:35:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:46,509 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-29 09:35:46,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:35:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-29 09:35:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-29 09:35:46,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:46,514 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:46,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:35:46,515 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:46,516 INFO L82 PathProgramCache]: Analyzing trace with hash -304225524, now seen corresponding path program 23 times [2020-10-29 09:35:46,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:46,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809040949] [2020-10-29 09:35:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:46,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:47,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:51,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:51,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-29 09:35:51,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:51,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 09:35:51,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:51,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:35:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-29 09:35:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 09:35:51,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:52,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:52,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:52,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:52,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:52,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:52,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:35:52,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:52,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:52,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:52,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:52,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:52,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-29 09:35:52,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809040949] [2020-10-29 09:35:52,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:52,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:35:52,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252480471] [2020-10-29 09:35:52,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:35:52,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:52,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:35:52,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:35:52,250 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 30 states. [2020-10-29 09:35:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:52,665 INFO L93 Difference]: Finished difference Result 229 states and 232 transitions. [2020-10-29 09:35:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:35:52,666 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 136 [2020-10-29 09:35:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:52,667 INFO L225 Difference]: With dead ends: 229 [2020-10-29 09:35:52,667 INFO L226 Difference]: Without dead ends: 144 [2020-10-29 09:35:52,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=367, Invalid=625, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:35:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-29 09:35:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-29 09:35:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-29 09:35:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-10-29 09:35:52,682 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 136 [2020-10-29 09:35:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:52,685 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-10-29 09:35:52,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:35:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-10-29 09:35:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-29 09:35:52,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:52,687 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:52,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:35:52,687 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:52,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159709, now seen corresponding path program 24 times [2020-10-29 09:35:52,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:52,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018728262] [2020-10-29 09:35:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:52,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:53,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:57,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:57,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-29 09:35:57,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:57,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 09:35:57,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:57,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:35:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-29 09:35:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 09:35:57,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:58,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:58,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:58,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:58,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:58,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:58,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:58,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:58,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:58,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:58,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:58,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:58,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-29 09:35:58,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018728262] [2020-10-29 09:35:58,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:58,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:35:58,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882997784] [2020-10-29 09:35:58,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:35:58,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:58,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:35:58,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:35:58,543 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 31 states. [2020-10-29 09:35:59,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:59,014 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-10-29 09:35:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:35:59,014 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 141 [2020-10-29 09:35:59,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:59,018 INFO L225 Difference]: With dead ends: 156 [2020-10-29 09:35:59,018 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 09:35:59,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:35:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 09:35:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-10-29 09:35:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-29 09:35:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-10-29 09:35:59,028 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2020-10-29 09:35:59,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:59,028 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-10-29 09:35:59,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:35:59,028 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-10-29 09:35:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-29 09:35:59,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:59,029 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:59,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:35:59,030 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:59,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:59,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1068573938, now seen corresponding path program 25 times [2020-10-29 09:35:59,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:59,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501473808] [2020-10-29 09:35:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:59,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:00,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:04,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:04,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-29 09:36:04,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:04,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 09:36:04,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:04,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:36:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-29 09:36:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-29 09:36:04,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:04,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:04,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:04,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:04,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:04,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:04,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:04,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:04,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:04,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:04,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:04,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:04,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-29 09:36:04,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501473808] [2020-10-29 09:36:04,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:04,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:36:04,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615463847] [2020-10-29 09:36:04,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:36:04,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:04,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:36:04,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:36:04,732 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 32 states. [2020-10-29 09:36:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:05,206 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2020-10-29 09:36:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:36:05,207 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 144 [2020-10-29 09:36:05,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:05,208 INFO L225 Difference]: With dead ends: 245 [2020-10-29 09:36:05,208 INFO L226 Difference]: Without dead ends: 154 [2020-10-29 09:36:05,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=422, Invalid=700, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:36:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-29 09:36:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-10-29 09:36:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-29 09:36:05,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-10-29 09:36:05,231 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 144 [2020-10-29 09:36:05,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:05,231 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-10-29 09:36:05,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:36:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-10-29 09:36:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-29 09:36:05,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:05,236 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:05,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:36:05,237 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:05,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:05,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1009377543, now seen corresponding path program 26 times [2020-10-29 09:36:05,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:05,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986822929] [2020-10-29 09:36:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:05,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:06,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:10,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:10,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-29 09:36:10,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:10,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 09:36:10,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:10,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:10,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:36:10,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-29 09:36:10,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 09:36:10,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:11,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:11,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:11,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:11,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:11,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:11,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:36:11,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:11,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:11,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:11,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:11,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:11,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-29 09:36:11,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986822929] [2020-10-29 09:36:11,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:11,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:36:11,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868384945] [2020-10-29 09:36:11,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:36:11,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:11,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:36:11,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:36:11,090 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 33 states. [2020-10-29 09:36:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:11,612 INFO L93 Difference]: Finished difference Result 253 states and 256 transitions. [2020-10-29 09:36:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:36:11,613 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 151 [2020-10-29 09:36:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:11,615 INFO L225 Difference]: With dead ends: 253 [2020-10-29 09:36:11,615 INFO L226 Difference]: Without dead ends: 159 [2020-10-29 09:36:11,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=451, Invalid=739, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:36:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-29 09:36:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-29 09:36:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:36:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-29 09:36:11,624 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 151 [2020-10-29 09:36:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:11,624 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-29 09:36:11,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:36:11,625 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-29 09:36:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-29 09:36:11,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:11,626 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:11,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:36:11,626 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:11,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:11,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1987177516, now seen corresponding path program 27 times [2020-10-29 09:36:11,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:11,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568715133] [2020-10-29 09:36:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:11,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:16,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:16,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-29 09:36:16,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:16,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 09:36:16,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:16,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:36:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 09:36:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-29 09:36:16,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:17,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:17,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:17,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:17,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:17,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:17,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:17,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:17,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:17,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-29 09:36:17,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568715133] [2020-10-29 09:36:17,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:17,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:36:17,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808320082] [2020-10-29 09:36:17,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:36:17,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:17,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:36:17,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:36:17,472 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 34 states. [2020-10-29 09:36:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:17,927 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2020-10-29 09:36:17,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:36:17,928 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 156 [2020-10-29 09:36:17,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:17,930 INFO L225 Difference]: With dead ends: 261 [2020-10-29 09:36:17,930 INFO L226 Difference]: Without dead ends: 164 [2020-10-29 09:36:17,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=481, Invalid=779, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:36:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-29 09:36:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-29 09:36:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-29 09:36:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-10-29 09:36:17,939 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 156 [2020-10-29 09:36:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:17,939 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-10-29 09:36:17,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:36:17,939 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-10-29 09:36:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-29 09:36:17,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:17,941 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:17,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:36:17,941 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:17,941 INFO L82 PathProgramCache]: Analyzing trace with hash 37670549, now seen corresponding path program 28 times [2020-10-29 09:36:17,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:17,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651077220] [2020-10-29 09:36:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:17,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:19,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:22,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:22,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-29 09:36:22,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:22,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 09:36:22,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:22,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:22,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:36:22,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-29 09:36:22,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 09:36:22,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:23,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:23,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:23,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:23,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:23,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:23,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:36:23,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:23,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:23,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:23,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:23,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:23,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-29 09:36:23,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651077220] [2020-10-29 09:36:23,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:23,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:36:23,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367667516] [2020-10-29 09:36:23,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:36:23,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:23,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:36:23,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:36:23,841 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 35 states. [2020-10-29 09:36:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:24,270 INFO L93 Difference]: Finished difference Result 269 states and 272 transitions. [2020-10-29 09:36:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:36:24,271 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 161 [2020-10-29 09:36:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:24,273 INFO L225 Difference]: With dead ends: 269 [2020-10-29 09:36:24,273 INFO L226 Difference]: Without dead ends: 169 [2020-10-29 09:36:24,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:36:24,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-29 09:36:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-10-29 09:36:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-29 09:36:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2020-10-29 09:36:24,282 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 161 [2020-10-29 09:36:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:24,282 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2020-10-29 09:36:24,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:36:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2020-10-29 09:36:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-29 09:36:24,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:24,283 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:24,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:36:24,284 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:24,284 INFO L82 PathProgramCache]: Analyzing trace with hash -714113992, now seen corresponding path program 29 times [2020-10-29 09:36:24,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:24,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638386088] [2020-10-29 09:36:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:24,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:25,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:29,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:29,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-29 09:36:29,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:29,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 09:36:29,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:29,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:29,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:36:29,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 09:36:29,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-29 09:36:29,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:30,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:30,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:30,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:30,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:30,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:30,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:30,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:30,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:30,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:30,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:30,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:30,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-29 09:36:30,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638386088] [2020-10-29 09:36:30,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:30,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:36:30,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546263509] [2020-10-29 09:36:30,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:36:30,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:30,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:36:30,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:36:30,261 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 36 states. [2020-10-29 09:36:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:30,788 INFO L93 Difference]: Finished difference Result 277 states and 280 transitions. [2020-10-29 09:36:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:36:30,789 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 166 [2020-10-29 09:36:30,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:30,791 INFO L225 Difference]: With dead ends: 277 [2020-10-29 09:36:30,791 INFO L226 Difference]: Without dead ends: 174 [2020-10-29 09:36:30,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:36:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-29 09:36:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-29 09:36:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-29 09:36:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2020-10-29 09:36:30,799 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 166 [2020-10-29 09:36:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:30,800 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2020-10-29 09:36:30,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:36:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2020-10-29 09:36:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-29 09:36:30,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:30,801 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:30,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:36:30,801 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:30,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:30,802 INFO L82 PathProgramCache]: Analyzing trace with hash -241648079, now seen corresponding path program 30 times [2020-10-29 09:36:30,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:30,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968935122] [2020-10-29 09:36:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:30,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:30,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:35,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:35,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-29 09:36:35,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:35,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 09:36:35,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:35,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:35,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:36:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-29 09:36:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-29 09:36:35,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:36,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:36,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:36,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:36,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:36,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:36,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:36,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:36,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:36,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-29 09:36:36,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968935122] [2020-10-29 09:36:36,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:36,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:36:36,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995178441] [2020-10-29 09:36:36,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:36:36,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:36,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:36:36,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:36:36,789 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 37 states. [2020-10-29 09:36:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:37,377 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2020-10-29 09:36:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:36:37,378 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 171 [2020-10-29 09:36:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:37,380 INFO L225 Difference]: With dead ends: 285 [2020-10-29 09:36:37,380 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:36:37,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=905, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:36:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:36:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-29 09:36:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-29 09:36:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-10-29 09:36:37,388 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 171 [2020-10-29 09:36:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:37,389 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-10-29 09:36:37,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:36:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-10-29 09:36:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-29 09:36:37,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:37,390 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:37,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:36:37,391 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1986315420, now seen corresponding path program 31 times [2020-10-29 09:36:37,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:37,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051729948] [2020-10-29 09:36:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:39,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:42,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:42,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-29 09:36:42,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:42,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 09:36:42,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:42,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:36:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-29 09:36:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-29 09:36:42,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:43,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:43,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:43,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:43,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:43,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:43,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:43,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:43,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:43,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:43,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:43,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:43,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-29 09:36:43,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051729948] [2020-10-29 09:36:43,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:43,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:36:43,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414995842] [2020-10-29 09:36:43,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:36:43,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:43,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:36:43,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:36:43,448 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 38 states. [2020-10-29 09:36:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:44,065 INFO L93 Difference]: Finished difference Result 293 states and 296 transitions. [2020-10-29 09:36:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:36:44,065 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 176 [2020-10-29 09:36:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:44,067 INFO L225 Difference]: With dead ends: 293 [2020-10-29 09:36:44,067 INFO L226 Difference]: Without dead ends: 184 [2020-10-29 09:36:44,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=611, Invalid=949, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:36:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-29 09:36:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-10-29 09:36:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-29 09:36:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2020-10-29 09:36:44,075 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 176 [2020-10-29 09:36:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:44,075 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2020-10-29 09:36:44,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:36:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2020-10-29 09:36:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-29 09:36:44,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:44,077 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:44,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:36:44,077 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1165602253, now seen corresponding path program 32 times [2020-10-29 09:36:44,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:44,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928180466] [2020-10-29 09:36:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:44,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:46,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:49,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:49,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-29 09:36:49,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:49,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-29 09:36:49,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:49,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:49,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:36:49,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-29 09:36:49,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 09:36:49,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:50,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:50,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:50,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:50,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:50,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:36:50,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:50,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-29 09:36:50,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928180466] [2020-10-29 09:36:50,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:50,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:36:50,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750200163] [2020-10-29 09:36:50,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:36:50,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:50,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:36:50,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:36:50,219 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 39 states. [2020-10-29 09:36:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:50,884 INFO L93 Difference]: Finished difference Result 301 states and 304 transitions. [2020-10-29 09:36:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:36:50,887 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 181 [2020-10-29 09:36:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:50,889 INFO L225 Difference]: With dead ends: 301 [2020-10-29 09:36:50,889 INFO L226 Difference]: Without dead ends: 189 [2020-10-29 09:36:50,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=646, Invalid=994, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:36:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-29 09:36:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2020-10-29 09:36:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-29 09:36:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2020-10-29 09:36:50,897 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 181 [2020-10-29 09:36:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:50,897 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2020-10-29 09:36:50,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:36:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2020-10-29 09:36:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-29 09:36:50,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:50,898 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:50,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:36:50,898 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1981295872, now seen corresponding path program 33 times [2020-10-29 09:36:50,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:50,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205046920] [2020-10-29 09:36:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:50,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:51,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:55,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:55,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-29 09:36:55,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:55,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 09:36:55,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:55,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:55,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:36:55,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-29 09:36:55,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 09:36:55,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:57,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:57,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:57,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:57,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:57,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:57,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:36:57,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:57,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:57,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-29 09:36:57,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205046920] [2020-10-29 09:36:57,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:57,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:36:57,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247063851] [2020-10-29 09:36:57,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:36:57,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:57,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:36:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:36:57,101 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 40 states. [2020-10-29 09:36:57,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:57,674 INFO L93 Difference]: Finished difference Result 309 states and 312 transitions. [2020-10-29 09:36:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:36:57,674 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 186 [2020-10-29 09:36:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:57,676 INFO L225 Difference]: With dead ends: 309 [2020-10-29 09:36:57,677 INFO L226 Difference]: Without dead ends: 194 [2020-10-29 09:36:57,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=682, Invalid=1040, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:36:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-29 09:36:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-10-29 09:36:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-29 09:36:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2020-10-29 09:36:57,690 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 186 [2020-10-29 09:36:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:57,690 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2020-10-29 09:36:57,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:36:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2020-10-29 09:36:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-29 09:36:57,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:57,692 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:57,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:36:57,693 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:57,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:57,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1107862167, now seen corresponding path program 34 times [2020-10-29 09:36:57,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:57,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874829366] [2020-10-29 09:36:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:57,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:00,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:02,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:02,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-29 09:37:02,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:02,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-29 09:37:02,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:02,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:37:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-29 09:37:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-29 09:37:02,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:03,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:03,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:03,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:03,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:03,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:03,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:03,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:03,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:03,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-29 09:37:03,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874829366] [2020-10-29 09:37:03,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:03,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:37:03,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952533642] [2020-10-29 09:37:03,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:37:03,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:03,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:37:03,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:37:03,984 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 41 states. [2020-10-29 09:37:04,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:04,656 INFO L93 Difference]: Finished difference Result 317 states and 320 transitions. [2020-10-29 09:37:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:37:04,657 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2020-10-29 09:37:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:04,659 INFO L225 Difference]: With dead ends: 317 [2020-10-29 09:37:04,659 INFO L226 Difference]: Without dead ends: 199 [2020-10-29 09:37:04,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=719, Invalid=1087, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:37:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-29 09:37:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2020-10-29 09:37:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-29 09:37:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2020-10-29 09:37:04,668 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 191 [2020-10-29 09:37:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:04,669 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2020-10-29 09:37:04,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:37:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2020-10-29 09:37:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-29 09:37:04,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:04,670 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:04,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:37:04,670 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1011616412, now seen corresponding path program 35 times [2020-10-29 09:37:04,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:04,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916604693] [2020-10-29 09:37:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:04,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:07,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:09,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:09,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-29 09:37:09,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:09,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-29 09:37:09,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:09,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:09,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:37:09,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-29 09:37:09,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-29 09:37:09,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:10,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:10,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:10,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:10,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:10,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:10,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:37:10,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:10,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:10,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:10,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:10,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:10,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-29 09:37:10,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916604693] [2020-10-29 09:37:10,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:10,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:37:10,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688127598] [2020-10-29 09:37:10,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:37:10,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:10,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:37:10,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:37:10,991 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 42 states. [2020-10-29 09:37:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:11,660 INFO L93 Difference]: Finished difference Result 325 states and 328 transitions. [2020-10-29 09:37:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:37:11,661 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 196 [2020-10-29 09:37:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:11,663 INFO L225 Difference]: With dead ends: 325 [2020-10-29 09:37:11,663 INFO L226 Difference]: Without dead ends: 204 [2020-10-29 09:37:11,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=757, Invalid=1135, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:37:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-29 09:37:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-29 09:37:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-29 09:37:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2020-10-29 09:37:11,672 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 196 [2020-10-29 09:37:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:11,673 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2020-10-29 09:37:11,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:37:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2020-10-29 09:37:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-29 09:37:11,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:11,674 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:11,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:37:11,675 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:11,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:11,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1135054085, now seen corresponding path program 36 times [2020-10-29 09:37:11,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:11,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985624776] [2020-10-29 09:37:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:11,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:16,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:16,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-29 09:37:16,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:16,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 09:37:16,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:16,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:16,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:37:16,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-29 09:37:16,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-29 09:37:16,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:17,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:17,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:17,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:17,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:17,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:17,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:17,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:17,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:17,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:17,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:17,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3441 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-29 09:37:18,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985624776] [2020-10-29 09:37:18,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:18,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:37:18,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705652974] [2020-10-29 09:37:18,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:37:18,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:18,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:37:18,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:37:18,018 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 43 states. [2020-10-29 09:37:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:18,613 INFO L93 Difference]: Finished difference Result 333 states and 336 transitions. [2020-10-29 09:37:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:37:18,613 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 201 [2020-10-29 09:37:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:18,615 INFO L225 Difference]: With dead ends: 333 [2020-10-29 09:37:18,615 INFO L226 Difference]: Without dead ends: 209 [2020-10-29 09:37:18,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:37:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-29 09:37:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-29 09:37:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-29 09:37:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-10-29 09:37:18,623 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 201 [2020-10-29 09:37:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:18,624 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-10-29 09:37:18,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:37:18,624 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-10-29 09:37:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-29 09:37:18,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:18,625 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:18,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:37:18,626 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash 400711112, now seen corresponding path program 37 times [2020-10-29 09:37:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:18,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91899379] [2020-10-29 09:37:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:18,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:22,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:23,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-29 09:37:23,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 09:37:23,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:23,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:37:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-29 09:37:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-29 09:37:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:24,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:24,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:24,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:24,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:24,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:24,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:24,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:24,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:24,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-29 09:37:24,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91899379] [2020-10-29 09:37:24,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:24,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:37:24,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487774161] [2020-10-29 09:37:24,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:37:24,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:24,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:37:24,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:37:24,977 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 44 states. [2020-10-29 09:37:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:25,687 INFO L93 Difference]: Finished difference Result 341 states and 344 transitions. [2020-10-29 09:37:25,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:37:25,687 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 206 [2020-10-29 09:37:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:25,688 INFO L225 Difference]: With dead ends: 341 [2020-10-29 09:37:25,689 INFO L226 Difference]: Without dead ends: 214 [2020-10-29 09:37:25,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:37:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-29 09:37:25,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-10-29 09:37:25,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-29 09:37:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2020-10-29 09:37:25,696 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 206 [2020-10-29 09:37:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:25,697 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2020-10-29 09:37:25,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:37:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2020-10-29 09:37:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-29 09:37:25,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:25,699 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:25,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:37:25,699 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:25,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:25,699 INFO L82 PathProgramCache]: Analyzing trace with hash 60816545, now seen corresponding path program 38 times [2020-10-29 09:37:25,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:25,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115278979] [2020-10-29 09:37:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:25,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:30,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-29 09:37:30,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:30,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-29 09:37:30,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:30,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:30,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:37:30,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-29 09:37:30,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-29 09:37:30,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:32,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:32,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:32,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:32,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:32,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:32,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:37:32,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:32,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:32,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3822 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-29 09:37:32,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115278979] [2020-10-29 09:37:32,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:32,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:37:32,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121526377] [2020-10-29 09:37:32,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:37:32,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:32,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:37:32,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:37:32,160 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand 45 states. [2020-10-29 09:37:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:32,902 INFO L93 Difference]: Finished difference Result 349 states and 352 transitions. [2020-10-29 09:37:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:37:32,903 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 211 [2020-10-29 09:37:32,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:32,906 INFO L225 Difference]: With dead ends: 349 [2020-10-29 09:37:32,906 INFO L226 Difference]: Without dead ends: 219 [2020-10-29 09:37:32,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=877, Invalid=1285, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:37:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-29 09:37:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-10-29 09:37:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-29 09:37:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2020-10-29 09:37:32,914 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 211 [2020-10-29 09:37:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:32,914 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2020-10-29 09:37:32,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:37:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2020-10-29 09:37:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-29 09:37:32,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:32,916 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:32,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:37:32,916 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:32,917 INFO L82 PathProgramCache]: Analyzing trace with hash -657611220, now seen corresponding path program 39 times [2020-10-29 09:37:32,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:32,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144373570] [2020-10-29 09:37:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:32,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:37,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:37,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:37,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-29 09:37:37,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:37,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-29 09:37:37,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:37,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:37,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:37:37,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-29 09:37:37,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-29 09:37:37,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:39,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:39,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:39,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:39,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:39,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:39,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:39,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:39,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:39,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4020 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-29 09:37:39,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144373570] [2020-10-29 09:37:39,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:39,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:37:39,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397631348] [2020-10-29 09:37:39,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:37:39,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:37:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:37:39,462 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 46 states. [2020-10-29 09:37:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:40,219 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2020-10-29 09:37:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:37:40,220 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 216 [2020-10-29 09:37:40,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:40,222 INFO L225 Difference]: With dead ends: 357 [2020-10-29 09:37:40,222 INFO L226 Difference]: Without dead ends: 224 [2020-10-29 09:37:40,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=919, Invalid=1337, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:37:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-29 09:37:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2020-10-29 09:37:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-29 09:37:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-10-29 09:37:40,230 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 216 [2020-10-29 09:37:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:40,231 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-10-29 09:37:40,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:37:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-10-29 09:37:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-29 09:37:40,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:40,232 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:40,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:37:40,233 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1955173315, now seen corresponding path program 40 times [2020-10-29 09:37:40,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:40,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753749233] [2020-10-29 09:37:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:40,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:40,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:45,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-29 09:37:45,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:45,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 09:37:45,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:45,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:45,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:37:45,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-29 09:37:45,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-29 09:37:45,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:46,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:46,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:46,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:46,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:46,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:46,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:46,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:46,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:46,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2020-10-29 09:37:46,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753749233] [2020-10-29 09:37:46,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:46,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:37:46,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898981866] [2020-10-29 09:37:46,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:37:46,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:46,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:37:46,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:37:46,864 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 47 states. [2020-10-29 09:37:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:47,611 INFO L93 Difference]: Finished difference Result 365 states and 368 transitions. [2020-10-29 09:37:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:37:47,612 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 221 [2020-10-29 09:37:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:47,614 INFO L225 Difference]: With dead ends: 365 [2020-10-29 09:37:47,614 INFO L226 Difference]: Without dead ends: 229 [2020-10-29 09:37:47,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=962, Invalid=1390, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:37:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-29 09:37:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2020-10-29 09:37:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-29 09:37:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2020-10-29 09:37:47,638 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 221 [2020-10-29 09:37:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:47,639 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2020-10-29 09:37:47,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:37:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2020-10-29 09:37:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-29 09:37:47,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:47,640 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:47,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:37:47,641 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash -31453552, now seen corresponding path program 41 times [2020-10-29 09:37:47,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:47,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399190940] [2020-10-29 09:37:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:47,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:52,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:52,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-29 09:37:52,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:52,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 09:37:52,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:52,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:52,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:37:52,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:52,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-29 09:37:52,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:54,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:54,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:54,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:54,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:54,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:54,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:54,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:54,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:54,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:54,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:54,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:54,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4431 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2020-10-29 09:37:54,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399190940] [2020-10-29 09:37:54,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:54,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:37:54,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321466200] [2020-10-29 09:37:54,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:37:54,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:54,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:37:54,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:37:54,243 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 46 states. [2020-10-29 09:37:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:54,767 INFO L93 Difference]: Finished difference Result 371 states and 374 transitions. [2020-10-29 09:37:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:37:54,768 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 226 [2020-10-29 09:37:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:54,773 INFO L225 Difference]: With dead ends: 371 [2020-10-29 09:37:54,773 INFO L226 Difference]: Without dead ends: 235 [2020-10-29 09:37:54,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:37:54,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-29 09:37:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 229. [2020-10-29 09:37:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-29 09:37:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2020-10-29 09:37:54,783 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 226 [2020-10-29 09:37:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:54,784 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2020-10-29 09:37:54,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:37:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2020-10-29 09:37:54,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-29 09:37:54,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:54,786 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:54,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:37:54,786 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:54,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:54,786 INFO L82 PathProgramCache]: Analyzing trace with hash -111879566, now seen corresponding path program 42 times [2020-10-29 09:37:54,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:54,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841721828] [2020-10-29 09:37:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:54,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking...