/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:47:51,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:47:51,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:47:51,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:47:51,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:47:51,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:47:51,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:47:51,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:47:51,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:47:51,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:47:51,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:47:51,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:47:51,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:47:51,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:47:51,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:47:51,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:47:51,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:47:51,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:47:51,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:47:51,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:47:51,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:47:51,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:47:51,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:47:51,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:47:51,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:47:51,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:47:51,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:47:51,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:47:51,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:47:51,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:47:51,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:47:51,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:47:51,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:47:51,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:47:51,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:47:51,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:47:51,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:47:51,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:47:51,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:47:51,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:47:51,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:47:51,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:47:51,552 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:47:51,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:47:51,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:47:51,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:47:51,558 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:47:51,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:47:51,558 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:47:51,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:47:51,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:47:51,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:47:51,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:47:51,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:47:51,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:47:51,561 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:47:51,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:47:51,561 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:47:51,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:47:51,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:47:51,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:47:51,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:47:51,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:47:51,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:47:51,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:47:51,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:47:51,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:47:51,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:47:51,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:47:51,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:47:51,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:47:51,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:47:52,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:47:52,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:47:52,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:47:52,146 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:47:52,147 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:47:52,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label04.c [2020-10-27 18:47:52,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fc69a02e/2d4855f13e3a476a8b7eb1c269295b2d/FLAGbdf324f5e [2020-10-27 18:47:53,062 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:47:53,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label04.c [2020-10-27 18:47:53,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fc69a02e/2d4855f13e3a476a8b7eb1c269295b2d/FLAGbdf324f5e [2020-10-27 18:47:53,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fc69a02e/2d4855f13e3a476a8b7eb1c269295b2d [2020-10-27 18:47:53,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:47:53,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:47:53,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:47:53,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:47:53,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:47:53,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:47:53" (1/1) ... [2020-10-27 18:47:53,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de5b2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:53, skipping insertion in model container [2020-10-27 18:47:53,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:47:53" (1/1) ... [2020-10-27 18:47:53,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:47:53,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:47:54,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:47:54,574 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:47:55,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:47:55,094 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:47:55,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:55 WrapperNode [2020-10-27 18:47:55,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:47:55,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:47:55,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:47:55,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:47:55,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:55" (1/1) ... [2020-10-27 18:47:55,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:55" (1/1) ... [2020-10-27 18:47:55,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:55" (1/1) ... [2020-10-27 18:47:55,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:55" (1/1) ... [2020-10-27 18:47:55,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:55" (1/1) ... [2020-10-27 18:47:55,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:55" (1/1) ... [2020-10-27 18:47:55,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:55" (1/1) ... [2020-10-27 18:47:55,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:47:55,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:47:55,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:47:55,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:47:55,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:47:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:47:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:47:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:47:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:47:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:47:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:47:55,557 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:47:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:47:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:47:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:47:55,559 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:47:55,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:47:55,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:47:55,560 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:47:55,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:47:55,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:47:55,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:47:55,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:47:55,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:47:55,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:47:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:48:05,145 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:48:05,145 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:48:05,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:48:05 BoogieIcfgContainer [2020-10-27 18:48:05,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:48:05,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:48:05,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:48:05,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:48:05,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:47:53" (1/3) ... [2020-10-27 18:48:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46af6050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:48:05, skipping insertion in model container [2020-10-27 18:48:05,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:55" (2/3) ... [2020-10-27 18:48:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46af6050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:48:05, skipping insertion in model container [2020-10-27 18:48:05,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:48:05" (3/3) ... [2020-10-27 18:48:05,158 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label04.c [2020-10-27 18:48:05,170 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:48:05,177 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:48:05,191 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:48:05,223 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:48:05,224 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:48:05,224 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:48:05,224 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:48:05,224 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:48:05,224 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:48:05,224 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:48:05,224 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:48:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:48:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 18:48:05,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:05,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:48:05,265 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1029137627, now seen corresponding path program 1 times [2020-10-27 18:48:05,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:05,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046302155] [2020-10-27 18:48:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:05,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:06,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:06,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 18:48:06,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:06,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-27 18:48:06,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:48:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:48:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 18:48:06,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:48:06,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:06,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:06,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:06,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:06,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:06,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 18:48:06,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:06,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:06,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:06,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:48:06,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:48:06,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046302155] [2020-10-27 18:48:06,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:48:06,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:48:06,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189772752] [2020-10-27 18:48:06,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:48:06,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:06,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:48:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:48:06,362 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 18:48:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:48:20,730 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 18:48:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:48:20,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 18:48:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:48:20,758 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 18:48:20,759 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 18:48:20,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:48:20,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 18:48:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 18:48:20,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 18:48:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 18:48:20,915 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 27 [2020-10-27 18:48:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:48:20,917 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 18:48:20,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:48:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 18:48:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 18:48:20,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:20,928 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:48:20,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:48:20,929 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1150649126, now seen corresponding path program 1 times [2020-10-27 18:48:20,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:20,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115972652] [2020-10-27 18:48:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:21,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:21,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:22,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:22,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:22,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 18:48:22,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:48:22,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1497 [2020-10-27 18:48:22,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:48:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 18:48:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 18:48:22,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:48:22,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:22,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:22,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:22,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:22,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:22,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:48:22,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:48:22,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:22,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:48:22,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:22,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:48:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:22,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:22,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:22,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:48:22,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:22,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 18:48:22,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:22,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:22,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:48:22,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:48:22,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115972652] [2020-10-27 18:48:22,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:48:22,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:48:22,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681789349] [2020-10-27 18:48:22,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:48:22,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:48:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:48:22,868 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 5 states. [2020-10-27 18:48:23,336 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:48:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:48:43,282 INFO L93 Difference]: Finished difference Result 2901 states and 4503 transitions. [2020-10-27 18:48:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:48:43,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-10-27 18:48:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:48:43,300 INFO L225 Difference]: With dead ends: 2901 [2020-10-27 18:48:43,300 INFO L226 Difference]: Without dead ends: 1915 [2020-10-27 18:48:43,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:48:43,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-10-27 18:48:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1890. [2020-10-27 18:48:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-10-27 18:48:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2684 transitions. [2020-10-27 18:48:43,394 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2684 transitions. Word has length 98 [2020-10-27 18:48:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:48:43,395 INFO L481 AbstractCegarLoop]: Abstraction has 1890 states and 2684 transitions. [2020-10-27 18:48:43,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:48:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2684 transitions. [2020-10-27 18:48:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 18:48:43,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:43,405 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:48:43,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:48:43,405 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:43,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:43,406 INFO L82 PathProgramCache]: Analyzing trace with hash 2145672399, now seen corresponding path program 1 times [2020-10-27 18:48:43,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:43,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122771597] [2020-10-27 18:48:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:43,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:43,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:43,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 18:48:43,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:43,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-27 18:48:43,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:48:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:48:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 18:48:43,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:43,974 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:48:43,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:43,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:43,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:43,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:43,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:43,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:48:43,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:43,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:48:43,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:43,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:48:43,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:44,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:48:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:44,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:44,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:44,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:48:44,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:44,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 18:48:44,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:44,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:48:44,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:48:44,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122771597] [2020-10-27 18:48:44,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:48:44,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:48:44,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127270441] [2020-10-27 18:48:44,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:48:44,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:48:44,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:48:44,188 INFO L87 Difference]: Start difference. First operand 1890 states and 2684 transitions. Second operand 5 states. [2020-10-27 18:49:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:02,682 INFO L93 Difference]: Finished difference Result 3782 states and 5766 transitions. [2020-10-27 18:49:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:49:02,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-10-27 18:49:02,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:02,703 INFO L225 Difference]: With dead ends: 3782 [2020-10-27 18:49:02,703 INFO L226 Difference]: Without dead ends: 2790 [2020-10-27 18:49:02,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:49:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2020-10-27 18:49:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2784. [2020-10-27 18:49:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2020-10-27 18:49:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3796 transitions. [2020-10-27 18:49:02,817 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3796 transitions. Word has length 101 [2020-10-27 18:49:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:02,820 INFO L481 AbstractCegarLoop]: Abstraction has 2784 states and 3796 transitions. [2020-10-27 18:49:02,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:49:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3796 transitions. [2020-10-27 18:49:02,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 18:49:02,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:02,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:02,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:49:02,827 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:02,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1006363853, now seen corresponding path program 1 times [2020-10-27 18:49:02,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:02,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740963955] [2020-10-27 18:49:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:02,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:03,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:03,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:03,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 18:49:03,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:49:03,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-10-27 18:49:03,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:03,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:03,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 18:49:03,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 18:49:03,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 18:49:03,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:03,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:03,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:03,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:03,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:03,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:49:03,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:03,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:03,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:03,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:03,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:04,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:04,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:04,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:04,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:49:04,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:04,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 18:49:04,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:04,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:04,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:04,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:49:04,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:49:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:49:04,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740963955] [2020-10-27 18:49:04,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:04,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:49:04,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220170357] [2020-10-27 18:49:04,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:49:04,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:04,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:49:04,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:49:04,228 INFO L87 Difference]: Start difference. First operand 2784 states and 3796 transitions. Second operand 5 states. [2020-10-27 18:49:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:24,335 INFO L93 Difference]: Finished difference Result 6484 states and 9160 transitions. [2020-10-27 18:49:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:49:24,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2020-10-27 18:49:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:24,366 INFO L225 Difference]: With dead ends: 6484 [2020-10-27 18:49:24,367 INFO L226 Difference]: Without dead ends: 4598 [2020-10-27 18:49:24,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:49:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4598 states. [2020-10-27 18:49:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4598 to 4556. [2020-10-27 18:49:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4556 states. [2020-10-27 18:49:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 6249 transitions. [2020-10-27 18:49:24,537 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 6249 transitions. Word has length 103 [2020-10-27 18:49:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:24,538 INFO L481 AbstractCegarLoop]: Abstraction has 4556 states and 6249 transitions. [2020-10-27 18:49:24,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:49:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 6249 transitions. [2020-10-27 18:49:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 18:49:24,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:24,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:24,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:49:24,540 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:24,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1069303146, now seen corresponding path program 1 times [2020-10-27 18:49:24,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:24,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579929577] [2020-10-27 18:49:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:24,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:24,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:25,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:25,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 18:49:25,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:49:25,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 939 [2020-10-27 18:49:25,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:25,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:25,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 18:49:25,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 18:49:25,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:25,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:25,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:25,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:25,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:25,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:25,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 18:49:25,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:25,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:25,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:25,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:25,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:25,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:25,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:25,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:25,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:49:25,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:25,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 18:49:25,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:25,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:25,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:25,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:49:25,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:49:26,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579929577] [2020-10-27 18:49:26,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:26,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:49:26,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339643683] [2020-10-27 18:49:26,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:49:26,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:26,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:49:26,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:49:26,004 INFO L87 Difference]: Start difference. First operand 4556 states and 6249 transitions. Second operand 5 states. [2020-10-27 18:49:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:44,296 INFO L93 Difference]: Finished difference Result 10007 states and 14334 transitions. [2020-10-27 18:49:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:49:44,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-27 18:49:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:44,341 INFO L225 Difference]: With dead ends: 10007 [2020-10-27 18:49:44,342 INFO L226 Difference]: Without dead ends: 6349 [2020-10-27 18:49:44,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:49:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6349 states. [2020-10-27 18:49:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6349 to 6335. [2020-10-27 18:49:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6335 states. [2020-10-27 18:49:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 8630 transitions. [2020-10-27 18:49:44,562 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 8630 transitions. Word has length 106 [2020-10-27 18:49:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:44,562 INFO L481 AbstractCegarLoop]: Abstraction has 6335 states and 8630 transitions. [2020-10-27 18:49:44,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:49:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 8630 transitions. [2020-10-27 18:49:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 18:49:44,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:44,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:44,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:49:44,566 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1380999830, now seen corresponding path program 1 times [2020-10-27 18:49:44,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:44,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254265674] [2020-10-27 18:49:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:44,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:45,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:45,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:45,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 18:49:45,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:49:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-10-27 18:49:45,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-27 18:49:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 18:49:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:45,888 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:49:45,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:45,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:45,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:45,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:45,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:45,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:49:45,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:45,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:45,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:45,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:45,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:45,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:45,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:46,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:46,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:49:46,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:46,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 18:49:46,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:46,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:46,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:46,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 18:49:46,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:49:46,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254265674] [2020-10-27 18:49:46,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:46,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:49:46,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118051998] [2020-10-27 18:49:46,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:49:46,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:46,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:49:46,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:49:46,153 INFO L87 Difference]: Start difference. First operand 6335 states and 8630 transitions. Second operand 6 states. [2020-10-27 18:50:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:50:19,517 INFO L93 Difference]: Finished difference Result 23602 states and 33388 transitions. [2020-10-27 18:50:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:50:19,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-27 18:50:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:50:19,608 INFO L225 Difference]: With dead ends: 23602 [2020-10-27 18:50:19,609 INFO L226 Difference]: Without dead ends: 17273 [2020-10-27 18:50:19,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:50:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17273 states. [2020-10-27 18:50:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17273 to 14669. [2020-10-27 18:50:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14669 states. [2020-10-27 18:50:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14669 states to 14669 states and 19700 transitions. [2020-10-27 18:50:20,147 INFO L78 Accepts]: Start accepts. Automaton has 14669 states and 19700 transitions. Word has length 117 [2020-10-27 18:50:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:50:20,147 INFO L481 AbstractCegarLoop]: Abstraction has 14669 states and 19700 transitions. [2020-10-27 18:50:20,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:50:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 14669 states and 19700 transitions. [2020-10-27 18:50:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 18:50:20,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:50:20,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:50:20,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:50:20,156 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:50:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:50:20,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2068007103, now seen corresponding path program 1 times [2020-10-27 18:50:20,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:50:20,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042609218] [2020-10-27 18:50:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:50:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:20,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:20,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:21,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:21,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:21,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 18:50:21,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:50:21,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1422 [2020-10-27 18:50:21,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:21,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:50:21,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-27 18:50:21,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 18:50:21,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:21,821 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:50:21,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:50:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:21,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:21,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:21,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:50:21,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:21,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:50:21,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:21,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:21,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:21,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:21,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:21,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:50:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:21,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:22,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:22,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 18:50:22,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:22,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 18:50:22,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:50:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 18:50:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:50:22,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042609218] [2020-10-27 18:50:22,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:50:22,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:50:22,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108279208] [2020-10-27 18:50:22,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:50:22,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:50:22,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:50:22,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:50:22,159 INFO L87 Difference]: Start difference. First operand 14669 states and 19700 transitions. Second operand 5 states. [2020-10-27 18:50:23,199 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 18:50:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:50:48,670 INFO L93 Difference]: Finished difference Result 39895 states and 54306 transitions. [2020-10-27 18:50:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:50:48,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-10-27 18:50:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:50:48,784 INFO L225 Difference]: With dead ends: 39895 [2020-10-27 18:50:48,784 INFO L226 Difference]: Without dead ends: 26997 [2020-10-27 18:50:48,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:50:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26997 states. [2020-10-27 18:50:49,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26997 to 26081. [2020-10-27 18:50:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26081 states. [2020-10-27 18:50:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26081 states to 26081 states and 34749 transitions. [2020-10-27 18:50:49,690 INFO L78 Accepts]: Start accepts. Automaton has 26081 states and 34749 transitions. Word has length 130 [2020-10-27 18:50:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:50:49,691 INFO L481 AbstractCegarLoop]: Abstraction has 26081 states and 34749 transitions. [2020-10-27 18:50:49,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:50:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 26081 states and 34749 transitions. [2020-10-27 18:50:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 18:50:49,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:50:49,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:50:49,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:50:49,698 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:50:49,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:50:49,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1136004035, now seen corresponding path program 1 times [2020-10-27 18:50:49,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:50:49,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928993004] [2020-10-27 18:50:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:50:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:49,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:50,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:50,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:52,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:52,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:54,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:54,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:54,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-27 18:50:54,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:50:54,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 18:50:54,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:54,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:50:54,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-10-27 18:50:54,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:50:54,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:50:54,943 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-10-27 18:50:55,077 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:50:55,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:50:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:55,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:55,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:55,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:50:55,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:55,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:50:55,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:55,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:55,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:55,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:55,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:55,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:50:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:55,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:55,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:55,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:50:55,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:55,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:50:55,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:55,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:55,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:55,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:55,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:55,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 18:50:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:55,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:55,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:55,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:50:55,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:55,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 18:50:55,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:55,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:50:55,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:55,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:50:55,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 18:50:55,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928993004] [2020-10-27 18:50:55,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:50:55,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:50:55,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136067732] [2020-10-27 18:50:55,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:50:55,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:50:55,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:50:55,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:50:55,486 INFO L87 Difference]: Start difference. First operand 26081 states and 34749 transitions. Second operand 5 states. [2020-10-27 18:50:57,564 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 18:51:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:51:13,984 INFO L93 Difference]: Finished difference Result 50411 states and 67335 transitions. [2020-10-27 18:51:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:51:13,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-10-27 18:51:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:51:14,081 INFO L225 Difference]: With dead ends: 50411 [2020-10-27 18:51:14,082 INFO L226 Difference]: Without dead ends: 26085 [2020-10-27 18:51:14,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:51:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26085 states. [2020-10-27 18:51:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26085 to 26081. [2020-10-27 18:51:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26081 states. [2020-10-27 18:51:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26081 states to 26081 states and 34724 transitions. [2020-10-27 18:51:15,006 INFO L78 Accepts]: Start accepts. Automaton has 26081 states and 34724 transitions. Word has length 173 [2020-10-27 18:51:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:51:15,007 INFO L481 AbstractCegarLoop]: Abstraction has 26081 states and 34724 transitions. [2020-10-27 18:51:15,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:51:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 26081 states and 34724 transitions. [2020-10-27 18:51:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 18:51:15,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:51:15,015 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:51:15,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:51:15,016 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:51:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:51:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1166016000, now seen corresponding path program 1 times [2020-10-27 18:51:15,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:51:15,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277463971] [2020-10-27 18:51:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:51:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:15,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:15,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:16,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:16,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 18:51:16,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:51:16,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1238 [2020-10-27 18:51:16,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:16,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 18:51:16,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:51:16,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-27 18:51:16,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:16,548 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:51:16,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:51:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:16,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:16,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:16,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:51:16,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:16,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 18:51:16,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:51:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:51:16,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:16,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:51:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:16,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:16,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:17,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:17,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 18:51:17,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:51:17,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-27 18:51:17,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:51:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:51:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 18:51:17,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:17,850 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2020-10-27 18:51:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 18:51:18,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277463971] [2020-10-27 18:51:18,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:51:18,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:51:18,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902416899] [2020-10-27 18:51:18,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:51:18,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:51:18,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:51:18,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:51:18,224 INFO L87 Difference]: Start difference. First operand 26081 states and 34724 transitions. Second operand 6 states. [2020-10-27 18:51:18,440 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:51:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:51:40,578 INFO L93 Difference]: Finished difference Result 50993 states and 68870 transitions. [2020-10-27 18:51:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 18:51:40,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2020-10-27 18:51:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:51:40,677 INFO L225 Difference]: With dead ends: 50993 [2020-10-27 18:51:40,678 INFO L226 Difference]: Without dead ends: 24918 [2020-10-27 18:51:40,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:51:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24918 states. [2020-10-27 18:51:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24918 to 24900. [2020-10-27 18:51:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24900 states. [2020-10-27 18:51:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24900 states to 24900 states and 33956 transitions. [2020-10-27 18:51:41,342 INFO L78 Accepts]: Start accepts. Automaton has 24900 states and 33956 transitions. Word has length 181 [2020-10-27 18:51:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:51:41,342 INFO L481 AbstractCegarLoop]: Abstraction has 24900 states and 33956 transitions. [2020-10-27 18:51:41,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:51:41,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24900 states and 33956 transitions. [2020-10-27 18:51:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-27 18:51:41,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:51:41,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:51:41,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:51:41,346 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:51:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:51:41,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2135488642, now seen corresponding path program 1 times [2020-10-27 18:51:41,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:51:41,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370177712] [2020-10-27 18:51:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:51:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:41,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:41,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:41,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:44,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:46,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:46,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:51:46,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:51:46,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 18:51:46,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:51:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:51:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 18:51:46,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:46,592 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:51:46,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:51:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:46,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:46,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:46,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:51:46,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:46,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:51:46,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:46,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:46,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:46,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:46,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:46,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:51:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:46,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:46,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:46,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:51:46,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:46,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 18:51:46,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:46,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:51:46,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:46,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:51:46,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:46,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 18:51:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:46,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:47,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:47,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:51:47,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:47,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 18:51:47,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:47,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:51:47,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:51:47,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 18:51:47,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:51:47,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370177712] [2020-10-27 18:51:47,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:51:47,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:51:47,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323704598] [2020-10-27 18:51:47,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:51:47,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:51:47,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:51:47,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:51:47,205 INFO L87 Difference]: Start difference. First operand 24900 states and 33956 transitions. Second operand 7 states. [2020-10-27 18:51:47,412 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66