/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/Problem15_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:11:00,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:11:00,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:11:00,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:11:00,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:11:00,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:11:00,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:11:00,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:11:00,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:11:00,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:11:00,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:11:00,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:11:00,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:11:00,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:11:00,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:11:00,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:11:00,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:11:00,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:11:00,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:11:00,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:11:00,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:11:00,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:11:00,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:11:00,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:11:00,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:11:00,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:11:00,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:11:00,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:11:00,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:11:00,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:11:00,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:11:00,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:11:00,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:11:00,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:11:00,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:11:00,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:11:00,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:11:00,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:11:00,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:11:00,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:11:00,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:11:00,525 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 [2020-10-28 13:11:00,592 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:11:00,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:11:00,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:11:00,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:11:00,599 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:11:00,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:11:00,599 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:11:00,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:11:00,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:11:00,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:11:00,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:11:00,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:11:00,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:11:00,602 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:11:00,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:11:00,603 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:11:00,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:11:00,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:11:00,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:11:00,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:11:00,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:11:00,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:11:00,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:11:00,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:11:00,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:11:00,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:11:00,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:11:00,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:11:00,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:11:00,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:11:01,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:11:01,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:11:01,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:11:01,197 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:11:01,198 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:11:01,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label45.c [2020-10-28 13:11:01,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/247815f3b/3bed09946e39441a87afbae679fe744f/FLAG2c479d5d5 [2020-10-28 13:11:02,468 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:11:02,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label45.c [2020-10-28 13:11:02,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/247815f3b/3bed09946e39441a87afbae679fe744f/FLAG2c479d5d5 [2020-10-28 13:11:02,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/247815f3b/3bed09946e39441a87afbae679fe744f [2020-10-28 13:11:02,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:11:02,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:11:02,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:11:02,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:11:02,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:11:02,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:11:02" (1/1) ... [2020-10-28 13:11:02,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5034e69a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:02, skipping insertion in model container [2020-10-28 13:11:02,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:11:02" (1/1) ... [2020-10-28 13:11:02,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:11:02,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:11:03,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:11:03,752 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:11:04,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:11:04,103 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:11:04,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:04 WrapperNode [2020-10-28 13:11:04,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:11:04,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:11:04,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:11:04,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:11:04,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:04" (1/1) ... [2020-10-28 13:11:04,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:04" (1/1) ... [2020-10-28 13:11:04,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:04" (1/1) ... [2020-10-28 13:11:04,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:04" (1/1) ... [2020-10-28 13:11:04,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:04" (1/1) ... [2020-10-28 13:11:04,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:04" (1/1) ... [2020-10-28 13:11:04,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:04" (1/1) ... [2020-10-28 13:11:04,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:11:04,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:11:04,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:11:04,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:11:04,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:04" (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 [2020-10-28 13:11:04,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:11:04,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:11:04,502 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:11:04,502 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:11:04,503 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:11:04,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:11:04,504 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:11:04,504 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:11:04,504 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:11:04,505 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:11:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:11:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:11:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:11:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:11:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:11:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:11:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:11:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:11:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:11:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:11:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:11:08,568 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:11:08,569 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:11:08,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:11:08 BoogieIcfgContainer [2020-10-28 13:11:08,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:11:08,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:11:08,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:11:08,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:11:08,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:11:02" (1/3) ... [2020-10-28 13:11:08,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a03c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:11:08, skipping insertion in model container [2020-10-28 13:11:08,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:11:04" (2/3) ... [2020-10-28 13:11:08,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a03c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:11:08, skipping insertion in model container [2020-10-28 13:11:08,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:11:08" (3/3) ... [2020-10-28 13:11:08,586 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label45.c [2020-10-28 13:11:08,603 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:11:08,611 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:11:08,632 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:11:08,675 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:11:08,676 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:11:08,676 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:11:08,676 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:11:08,676 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:11:08,677 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:11:08,677 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:11:08,677 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:11:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-28 13:11:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 13:11:08,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:11:08,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:11:08,726 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:11:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:11:08,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2117039617, now seen corresponding path program 1 times [2020-10-28 13:11:08,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:11:08,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917909582] [2020-10-28 13:11:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:11:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:09,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:09,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:09,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 13:11:09,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:09,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 729 [2020-10-28 13:11:09,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:09,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:11:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:11:09,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 13:11:09,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 13:11:09,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:11:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:09,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:10,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:10,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:11:10,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:10,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-28 13:11:10,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:10,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:10,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:11:10,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:10,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:11:10,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:11:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:11:10,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917909582] [2020-10-28 13:11:10,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:11:10,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:11:10,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688963632] [2020-10-28 13:11:10,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:11:10,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:11:10,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:11:10,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:11:10,085 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-28 13:11:20,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:11:20,252 INFO L93 Difference]: Finished difference Result 1229 states and 2206 transitions. [2020-10-28 13:11:20,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:11:20,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-28 13:11:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:11:20,280 INFO L225 Difference]: With dead ends: 1229 [2020-10-28 13:11:20,280 INFO L226 Difference]: Without dead ends: 709 [2020-10-28 13:11:20,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:11:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-10-28 13:11:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 695. [2020-10-28 13:11:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-28 13:11:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1081 transitions. [2020-10-28 13:11:20,425 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1081 transitions. Word has length 36 [2020-10-28 13:11:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:11:20,426 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1081 transitions. [2020-10-28 13:11:20,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:11:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1081 transitions. [2020-10-28 13:11:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 13:11:20,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:11:20,433 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:11:20,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:11:20,434 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:11:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:11:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash 950484538, now seen corresponding path program 1 times [2020-10-28 13:11:20,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:11:20,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329549611] [2020-10-28 13:11:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:11:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:20,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:20,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:22,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:22,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:22,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 13:11:22,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:11:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1704 [2020-10-28 13:11:22,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:22,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:22,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:11:22,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:11:22,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:11:22,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:11:22,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:11:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:22,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:22,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:22,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:11:22,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:22,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 13:11:22,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:22,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:22,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:11:22,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:22,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:11:22,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:11:22,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:11:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:22,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:22,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:22,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 13:11:22,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:22,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-28 13:11:22,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:22,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:22,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:11:22,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:11:22,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 13:11:22,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:11:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:11:22,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329549611] [2020-10-28 13:11:22,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:11:22,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:11:22,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084667853] [2020-10-28 13:11:22,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:11:22,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:11:22,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:11:22,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:11:22,736 INFO L87 Difference]: Start difference. First operand 695 states and 1081 transitions. Second operand 7 states. [2020-10-28 13:11:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:11:33,115 INFO L93 Difference]: Finished difference Result 1722 states and 2740 transitions. [2020-10-28 13:11:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:11:33,116 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 106 [2020-10-28 13:11:33,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:11:33,124 INFO L225 Difference]: With dead ends: 1722 [2020-10-28 13:11:33,125 INFO L226 Difference]: Without dead ends: 1033 [2020-10-28 13:11:33,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:11:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2020-10-28 13:11:33,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 999. [2020-10-28 13:11:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2020-10-28 13:11:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1350 transitions. [2020-10-28 13:11:33,193 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1350 transitions. Word has length 106 [2020-10-28 13:11:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:11:33,194 INFO L481 AbstractCegarLoop]: Abstraction has 999 states and 1350 transitions. [2020-10-28 13:11:33,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:11:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1350 transitions. [2020-10-28 13:11:33,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 13:11:33,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:11:33,200 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:11:33,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:11:33,201 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:11:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:11:33,201 INFO L82 PathProgramCache]: Analyzing trace with hash -583128206, now seen corresponding path program 1 times [2020-10-28 13:11:33,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:11:33,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888974279] [2020-10-28 13:11:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:11:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:33,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:33,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:34,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:34,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 13:11:34,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:11:34,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-10-28 13:11:34,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:34,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:11:34,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:11:34,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 13:11:34,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:11:34,460 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:11:34,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:11:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:34,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:34,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:34,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:11:34,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 13:11:34,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:34,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:34,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:11:34,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:34,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:11:34,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:11:34,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:11:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:34,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:34,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:34,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:11:34,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:34,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 13:11:34,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:34,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:34,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:11:34,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:11:34,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:11:34,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:11:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:11:34,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888974279] [2020-10-28 13:11:34,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:11:34,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 13:11:34,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202797196] [2020-10-28 13:11:34,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:11:34,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:11:34,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:11:34,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:11:34,790 INFO L87 Difference]: Start difference. First operand 999 states and 1350 transitions. Second operand 8 states. [2020-10-28 13:11:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:11:51,609 INFO L93 Difference]: Finished difference Result 2986 states and 4301 transitions. [2020-10-28 13:11:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 13:11:51,613 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-10-28 13:11:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:11:51,635 INFO L225 Difference]: With dead ends: 2986 [2020-10-28 13:11:51,635 INFO L226 Difference]: Without dead ends: 2300 [2020-10-28 13:11:51,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 13:11:51,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2020-10-28 13:11:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1973. [2020-10-28 13:11:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1973 states. [2020-10-28 13:11:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 2626 transitions. [2020-10-28 13:11:51,723 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 2626 transitions. Word has length 110 [2020-10-28 13:11:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:11:51,724 INFO L481 AbstractCegarLoop]: Abstraction has 1973 states and 2626 transitions. [2020-10-28 13:11:51,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:11:51,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 2626 transitions. [2020-10-28 13:11:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-28 13:11:51,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:11:51,730 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:11:51,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:11:51,730 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:11:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:11:51,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1446893833, now seen corresponding path program 1 times [2020-10-28 13:11:51,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:11:51,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555858601] [2020-10-28 13:11:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:11:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:51,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:52,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:53,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:55,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:55,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-28 13:11:55,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:11:55,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3430 [2020-10-28 13:11:55,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:55,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:55,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:11:55,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:11:55,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-28 13:11:55,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:55,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:11:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:55,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:55,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:55,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:11:55,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:55,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 13:11:55,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:55,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:11:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:11:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:11:55,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:11:55,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:11:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:11:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:11:56,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:11:56,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 13:11:56,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:11:56,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-28 13:11:56,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:11:56,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:11:56,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:11:56,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:11:56,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-28 13:11:56,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:11:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:11:56,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555858601] [2020-10-28 13:11:56,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:11:56,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:11:56,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088521336] [2020-10-28 13:11:56,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:11:56,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:11:56,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:11:56,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:11:56,718 INFO L87 Difference]: Start difference. First operand 1973 states and 2626 transitions. Second operand 7 states. [2020-10-28 13:12:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:12:06,572 INFO L93 Difference]: Finished difference Result 4282 states and 5619 transitions. [2020-10-28 13:12:06,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 13:12:06,575 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 236 [2020-10-28 13:12:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:12:06,591 INFO L225 Difference]: With dead ends: 4282 [2020-10-28 13:12:06,591 INFO L226 Difference]: Without dead ends: 2315 [2020-10-28 13:12:06,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-28 13:12:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-10-28 13:12:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2289. [2020-10-28 13:12:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-10-28 13:12:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 2951 transitions. [2020-10-28 13:12:06,685 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 2951 transitions. Word has length 236 [2020-10-28 13:12:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:12:06,686 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 2951 transitions. [2020-10-28 13:12:06,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:12:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 2951 transitions. [2020-10-28 13:12:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-28 13:12:06,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:12:06,695 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:12:06,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:12:06,695 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:12:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:12:06,696 INFO L82 PathProgramCache]: Analyzing trace with hash -686211058, now seen corresponding path program 1 times [2020-10-28 13:12:06,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:12:06,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729220425] [2020-10-28 13:12:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:12:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:06,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:07,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:08,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:08,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-28 13:12:08,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:12:08,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2013 [2020-10-28 13:12:08,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:08,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:12:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:12:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 13:12:08,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:09,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:12:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:09,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:09,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:09,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:12:09,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:09,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 13:12:09,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:09,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:09,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:12:09,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:12:09,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:12:09,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:09,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:12:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:09,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:09,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:09,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:12:09,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:09,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-28 13:12:09,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:09,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:09,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:12:09,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:12:09,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:12:09,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:12:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:12:09,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729220425] [2020-10-28 13:12:09,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:12:09,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:12:09,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092322898] [2020-10-28 13:12:09,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:12:09,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:12:09,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:12:09,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:12:09,835 INFO L87 Difference]: Start difference. First operand 2289 states and 2951 transitions. Second operand 5 states. [2020-10-28 13:12:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:12:17,867 INFO L93 Difference]: Finished difference Result 4578 states and 6386 transitions. [2020-10-28 13:12:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:12:17,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2020-10-28 13:12:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:12:17,922 INFO L225 Difference]: With dead ends: 4578 [2020-10-28 13:12:17,922 INFO L226 Difference]: Without dead ends: 3542 [2020-10-28 13:12:17,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:12:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2020-10-28 13:12:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3531. [2020-10-28 13:12:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3531 states. [2020-10-28 13:12:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 4400 transitions. [2020-10-28 13:12:18,052 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 4400 transitions. Word has length 310 [2020-10-28 13:12:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:12:18,054 INFO L481 AbstractCegarLoop]: Abstraction has 3531 states and 4400 transitions. [2020-10-28 13:12:18,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:12:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 4400 transitions. [2020-10-28 13:12:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-10-28 13:12:18,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:12:18,065 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:12:18,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:12:18,066 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:12:18,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:12:18,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1680081747, now seen corresponding path program 1 times [2020-10-28 13:12:18,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:12:18,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513322202] [2020-10-28 13:12:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:12:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:18,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:18,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:21,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:21,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 404 [2020-10-28 13:12:21,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:12:21,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2803 [2020-10-28 13:12:21,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:21,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:21,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:12:21,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:12:21,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:12:21,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:21,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:12:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:21,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:21,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:21,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:12:21,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:21,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 13:12:21,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:21,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:12:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:12:21,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:12:21,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:21,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:12:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:21,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:21,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:21,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:12:21,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-28 13:12:21,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:21,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:12:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:12:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:12:21,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:21,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:12:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:21,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:21,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:21,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:12:21,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:21,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-28 13:12:21,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:21,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:12:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:12:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:12:21,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:12:22,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513322202] [2020-10-28 13:12:22,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:12:22,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:12:22,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907319940] [2020-10-28 13:12:22,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:12:22,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:12:22,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:12:22,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:12:22,154 INFO L87 Difference]: Start difference. First operand 3531 states and 4400 transitions. Second operand 7 states. [2020-10-28 13:12:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:12:34,048 INFO L93 Difference]: Finished difference Result 7759 states and 9894 transitions. [2020-10-28 13:12:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:12:34,051 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 390 [2020-10-28 13:12:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:12:34,075 INFO L225 Difference]: With dead ends: 7759 [2020-10-28 13:12:34,075 INFO L226 Difference]: Without dead ends: 4541 [2020-10-28 13:12:34,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:12:34,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4541 states. [2020-10-28 13:12:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4541 to 4506. [2020-10-28 13:12:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4506 states. [2020-10-28 13:12:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 5527 transitions. [2020-10-28 13:12:34,202 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 5527 transitions. Word has length 390 [2020-10-28 13:12:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:12:34,203 INFO L481 AbstractCegarLoop]: Abstraction has 4506 states and 5527 transitions. [2020-10-28 13:12:34,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:12:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 5527 transitions. [2020-10-28 13:12:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-10-28 13:12:34,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:12:34,213 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:12:34,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:12:34,213 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:12:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:12:34,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1874770831, now seen corresponding path program 1 times [2020-10-28 13:12:34,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:12:34,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849725155] [2020-10-28 13:12:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:12:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:34,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:34,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:34,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:35,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:36,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:39,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:39,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 427 [2020-10-28 13:12:39,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:12:39,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 13:12:39,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:39,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:39,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:12:39,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 13:12:39,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 285 [2020-10-28 13:12:39,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 13:12:39,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:12:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:39,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:39,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:39,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:12:39,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:39,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:12:39,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:39,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:12:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:12:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:12:39,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:39,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:12:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:39,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:39,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:39,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 13:12:39,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:39,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-28 13:12:39,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:39,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:39,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:12:39,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:12:39,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 13:12:39,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:39,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 13:12:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:39,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:39,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:40,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:40,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 13:12:40,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:12:40,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-28 13:12:40,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:40,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:12:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:12:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-28 13:12:40,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:40,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2020-10-28 13:12:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:40,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:40,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:40,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:12:40,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:40,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-28 13:12:40,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:40,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:40,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:12:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:12:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:12:40,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 253 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 13:12:40,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849725155] [2020-10-28 13:12:40,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:12:40,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:12:40,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95974806] [2020-10-28 13:12:40,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:12:40,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:12:40,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:12:40,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:12:40,990 INFO L87 Difference]: Start difference. First operand 4506 states and 5527 transitions. Second operand 7 states. [2020-10-28 13:12:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:12:55,832 INFO L93 Difference]: Finished difference Result 11296 states and 14323 transitions. [2020-10-28 13:12:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:12:55,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 411 [2020-10-28 13:12:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:12:55,868 INFO L225 Difference]: With dead ends: 11296 [2020-10-28 13:12:55,868 INFO L226 Difference]: Without dead ends: 6783 [2020-10-28 13:12:55,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:12:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6783 states. [2020-10-28 13:12:56,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6783 to 5845. [2020-10-28 13:12:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5845 states. [2020-10-28 13:12:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 7063 transitions. [2020-10-28 13:12:56,058 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 7063 transitions. Word has length 411 [2020-10-28 13:12:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:12:56,059 INFO L481 AbstractCegarLoop]: Abstraction has 5845 states and 7063 transitions. [2020-10-28 13:12:56,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:12:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 7063 transitions. [2020-10-28 13:12:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-10-28 13:12:56,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:12:56,070 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:12:56,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:12:56,071 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:12:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:12:56,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1556206208, now seen corresponding path program 1 times [2020-10-28 13:12:56,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:12:56,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892744603] [2020-10-28 13:12:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:12:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:56,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:56,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:59,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:59,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 435 [2020-10-28 13:12:59,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:12:59,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2925 [2020-10-28 13:12:59,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:59,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:12:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:12:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 13:12:59,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:59,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:12:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:59,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:59,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:59,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:12:59,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:59,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:12:59,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:59,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:59,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:12:59,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:12:59,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:12:59,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:59,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:12:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:59,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:59,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:59,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:12:59,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:59,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-28 13:12:59,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:59,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:59,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:12:59,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:12:59,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:12:59,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:12:59,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:12:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:12:59,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:12:59,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:12:59,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:12:59,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:12:59,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-28 13:12:59,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:12:59,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:12:59,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:12:59,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:12:59,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:12:59,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:13:00,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892744603] [2020-10-28 13:13:00,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:13:00,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:13:00,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667867366] [2020-10-28 13:13:00,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:13:00,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:13:00,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:13:00,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:13:00,433 INFO L87 Difference]: Start difference. First operand 5845 states and 7063 transitions. Second operand 7 states. [2020-10-28 13:13:03,838 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:13:12,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:13:12,629 INFO L93 Difference]: Finished difference Result 12404 states and 15091 transitions. [2020-10-28 13:13:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:13:12,632 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 421 [2020-10-28 13:13:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:13:12,679 INFO L225 Difference]: With dead ends: 12404 [2020-10-28 13:13:12,680 INFO L226 Difference]: Without dead ends: 6872 [2020-10-28 13:13:12,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:13:12,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6872 states. [2020-10-28 13:13:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6872 to 6807. [2020-10-28 13:13:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6807 states. [2020-10-28 13:13:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 8128 transitions. [2020-10-28 13:13:12,905 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 8128 transitions. Word has length 421 [2020-10-28 13:13:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:13:12,906 INFO L481 AbstractCegarLoop]: Abstraction has 6807 states and 8128 transitions. [2020-10-28 13:13:12,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:13:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 8128 transitions. [2020-10-28 13:13:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-10-28 13:13:12,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:13:12,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:13:12,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:13:12,912 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:13:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:13:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash 753804280, now seen corresponding path program 1 times [2020-10-28 13:13:12,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:13:12,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993886583] [2020-10-28 13:13:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:13:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:13,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:13,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:13,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 447 [2020-10-28 13:13:13,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:13,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-10-28 13:13:13,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:13,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:13,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:13:13,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:13:13,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 13:13:13,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:14,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:13:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:14,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:14,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:14,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:13:14,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:14,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 13:13:14,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:14,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:13:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:13:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:13:14,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:14,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:13:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:14,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:14,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:14,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:13:14,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:14,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 13:13:14,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:14,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:13:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:13:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:13:14,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:14,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:13:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:14,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:14,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:14,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:13:14,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:14,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-28 13:13:14,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:14,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:14,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:13:14,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:13:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:13:14,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 13:13:14,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993886583] [2020-10-28 13:13:14,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:13:14,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:13:14,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616770292] [2020-10-28 13:13:14,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:13:14,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:13:14,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:13:14,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:13:14,894 INFO L87 Difference]: Start difference. First operand 6807 states and 8128 transitions. Second operand 5 states. [2020-10-28 13:13:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:13:25,954 INFO L93 Difference]: Finished difference Result 13620 states and 16356 transitions. [2020-10-28 13:13:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:13:25,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 433 [2020-10-28 13:13:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:13:25,982 INFO L225 Difference]: With dead ends: 13620 [2020-10-28 13:13:25,983 INFO L226 Difference]: Without dead ends: 7126 [2020-10-28 13:13:26,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:13:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2020-10-28 13:13:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 6797. [2020-10-28 13:13:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6797 states. [2020-10-28 13:13:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6797 states to 6797 states and 7746 transitions. [2020-10-28 13:13:26,170 INFO L78 Accepts]: Start accepts. Automaton has 6797 states and 7746 transitions. Word has length 433 [2020-10-28 13:13:26,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:13:26,171 INFO L481 AbstractCegarLoop]: Abstraction has 6797 states and 7746 transitions. [2020-10-28 13:13:26,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:13:26,172 INFO L276 IsEmpty]: Start isEmpty. Operand 6797 states and 7746 transitions. [2020-10-28 13:13:26,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2020-10-28 13:13:26,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:13:26,180 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:13:26,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:13:26,180 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:13:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:13:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash -323003252, now seen corresponding path program 1 times [2020-10-28 13:13:26,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:13:26,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906069112] [2020-10-28 13:13:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:13:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:26,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:26,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:28,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:28,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:29,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:31,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:31,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 540 [2020-10-28 13:13:31,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:13:31,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4836 [2020-10-28 13:13:31,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:31,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:13:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:13:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 13:13:31,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:31,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:13:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:31,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:31,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:31,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:13:31,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:31,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:13:31,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:31,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:31,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:13:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:13:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:13:31,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:31,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:13:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:31,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:31,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:31,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:13:31,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:31,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 13:13:31,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:31,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:13:31,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:13:31,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:13:31,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:31,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:13:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:31,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:31,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:31,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:13:31,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:31,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-28 13:13:31,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:31,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:31,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:13:31,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:13:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:13:31,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:31,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:13:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:31,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:31,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:31,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 13:13:31,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:31,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-28 13:13:31,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:31,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:31,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:13:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:13:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 13:13:31,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:13:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 230 proven. 29 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-28 13:13:32,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906069112] [2020-10-28 13:13:32,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:13:32,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 13:13:32,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447261291] [2020-10-28 13:13:32,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 13:13:32,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:13:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 13:13:32,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:13:32,135 INFO L87 Difference]: Start difference. First operand 6797 states and 7746 transitions. Second operand 6 states. [2020-10-28 13:13:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:13:42,927 INFO L93 Difference]: Finished difference Result 14494 states and 17716 transitions. [2020-10-28 13:13:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 13:13:42,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 524 [2020-10-28 13:13:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:13:42,971 INFO L225 Difference]: With dead ends: 14494 [2020-10-28 13:13:42,972 INFO L226 Difference]: Without dead ends: 9570 [2020-10-28 13:13:42,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:13:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9570 states. [2020-10-28 13:13:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9570 to 9451. [2020-10-28 13:13:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9451 states. [2020-10-28 13:13:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9451 states to 9451 states and 11039 transitions. [2020-10-28 13:13:43,271 INFO L78 Accepts]: Start accepts. Automaton has 9451 states and 11039 transitions. Word has length 524 [2020-10-28 13:13:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:13:43,272 INFO L481 AbstractCegarLoop]: Abstraction has 9451 states and 11039 transitions. [2020-10-28 13:13:43,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 13:13:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 9451 states and 11039 transitions. [2020-10-28 13:13:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-10-28 13:13:43,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:13:43,282 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:13:43,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:13:43,283 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:13:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:13:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1966372118, now seen corresponding path program 1 times [2020-10-28 13:13:43,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:13:43,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862201786] [2020-10-28 13:13:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:13:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:43,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:43,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:45,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:46,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:47,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:47,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 550 [2020-10-28 13:13:47,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:13:47,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4433 [2020-10-28 13:13:47,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:47,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:47,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:13:47,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:13:47,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 13:13:47,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:48,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:13:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:48,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:48,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:48,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:13:48,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:48,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:13:48,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:48,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:13:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:13:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:13:48,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:48,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:13:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:48,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:48,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:48,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:13:48,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:48,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 13:13:48,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:48,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:48,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:13:48,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:13:48,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:13:48,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:48,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:13:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:48,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:48,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:48,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:13:48,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:13:48,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 13:13:48,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:48,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:48,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:13:48,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:13:48,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:13:48,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:48,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:13:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:13:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:48,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:13:48,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:13:48,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 13:13:48,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:13:48,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-28 13:13:48,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:13:48,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:13:48,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:13:48,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:13:48,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 13:13:48,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:13:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 254 proven. 29 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-28 13:13:48,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862201786] [2020-10-28 13:13:48,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:13:48,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:13:48,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274590848] [2020-10-28 13:13:48,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:13:48,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:13:48,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:13:48,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:13:48,891 INFO L87 Difference]: Start difference. First operand 9451 states and 11039 transitions. Second operand 7 states. [2020-10-28 13:14:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:14:07,889 INFO L93 Difference]: Finished difference Result 20898 states and 25298 transitions. [2020-10-28 13:14:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:14:07,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 534 [2020-10-28 13:14:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:14:07,941 INFO L225 Difference]: With dead ends: 20898 [2020-10-28 13:14:07,941 INFO L226 Difference]: Without dead ends: 13320 [2020-10-28 13:14:07,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:14:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13320 states. [2020-10-28 13:14:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13320 to 12031. [2020-10-28 13:14:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12031 states. [2020-10-28 13:14:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12031 states to 12031 states and 14311 transitions. [2020-10-28 13:14:08,267 INFO L78 Accepts]: Start accepts. Automaton has 12031 states and 14311 transitions. Word has length 534 [2020-10-28 13:14:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:14:08,269 INFO L481 AbstractCegarLoop]: Abstraction has 12031 states and 14311 transitions. [2020-10-28 13:14:08,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:14:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 12031 states and 14311 transitions. [2020-10-28 13:14:08,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2020-10-28 13:14:08,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:14:08,279 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:14:08,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 13:14:08,279 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:14:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:14:08,280 INFO L82 PathProgramCache]: Analyzing trace with hash 373254554, now seen corresponding path program 1 times [2020-10-28 13:14:08,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:14:08,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089373165] [2020-10-28 13:14:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:14:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:08,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:08,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:11,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:13,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:13,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 577 [2020-10-28 13:14:13,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:14:13,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-28 13:14:13,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:13,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:13,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:14:13,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:14:13,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 13:14:13,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:14:13,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:14:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:13,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:13,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:13,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:14:13,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:13,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:14:13,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:13,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:13,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:14:13,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:14:13,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:14:13,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:14:13,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:14:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:13,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:14,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:14,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:14:14,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:14,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-28 13:14:14,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:14,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:14,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:14:14,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:14:14,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:14:14,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:14:14,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:14:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:14,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:14,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:14,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:14:14,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:14,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 13:14:14,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:14,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:14:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:14:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:14:14,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:14:14,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:14:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:14,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:14,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:14,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 13:14:14,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:14,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 13:14:14,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:14,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:14,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:14:14,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:14:14,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 13:14:14,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:14:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 13:14:15,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089373165] [2020-10-28 13:14:15,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:14:15,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:14:15,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264198484] [2020-10-28 13:14:15,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:14:15,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:14:15,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:14:15,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:14:15,045 INFO L87 Difference]: Start difference. First operand 12031 states and 14311 transitions. Second operand 7 states. [2020-10-28 13:14:20,480 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:14:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:14:30,550 INFO L93 Difference]: Finished difference Result 27510 states and 33956 transitions. [2020-10-28 13:14:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:14:30,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 561 [2020-10-28 13:14:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:14:30,628 INFO L225 Difference]: With dead ends: 27510 [2020-10-28 13:14:30,628 INFO L226 Difference]: Without dead ends: 17352 [2020-10-28 13:14:30,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:14:30,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17352 states. [2020-10-28 13:14:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17352 to 17021. [2020-10-28 13:14:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17021 states. [2020-10-28 13:14:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17021 states to 17021 states and 20547 transitions. [2020-10-28 13:14:31,094 INFO L78 Accepts]: Start accepts. Automaton has 17021 states and 20547 transitions. Word has length 561 [2020-10-28 13:14:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:14:31,096 INFO L481 AbstractCegarLoop]: Abstraction has 17021 states and 20547 transitions. [2020-10-28 13:14:31,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:14:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 17021 states and 20547 transitions. [2020-10-28 13:14:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2020-10-28 13:14:31,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:14:31,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:14:31,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 13:14:31,114 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:14:31,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:14:31,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1979568166, now seen corresponding path program 1 times [2020-10-28 13:14:31,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:14:31,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217958839] [2020-10-28 13:14:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:14:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:31,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:31,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:35,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:36,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:36,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 701 [2020-10-28 13:14:36,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:14:36,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-28 13:14:36,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:36,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:36,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:14:36,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 560 [2020-10-28 13:14:36,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 13:14:36,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:14:36,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:14:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:36,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:36,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:36,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:14:36,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:36,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 13:14:36,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:36,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:36,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:14:36,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:14:36,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:14:36,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:14:36,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:14:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:36,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:36,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:36,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:14:36,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:36,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-28 13:14:36,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:36,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:14:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:14:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:14:36,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:14:36,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:14:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:36,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:36,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:36,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:14:36,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:36,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 13:14:36,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:36,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:36,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:14:36,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:14:36,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:14:36,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:14:36,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:14:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:36,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:36,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:36,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 13:14:36,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:36,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-28 13:14:36,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:36,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:14:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:14:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 13:14:36,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:14:37,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-10-28 13:14:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:37,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:37,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:37,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 13:14:37,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:37,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-28 13:14:37,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:37,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:37,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:14:37,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:14:37,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 13:14:37,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:14:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 416 proven. 2 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-10-28 13:14:37,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217958839] [2020-10-28 13:14:37,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:14:37,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:14:37,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964355040] [2020-10-28 13:14:37,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:14:37,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:14:37,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:14:37,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:14:37,505 INFO L87 Difference]: Start difference. First operand 17021 states and 20547 transitions. Second operand 7 states. [2020-10-28 13:14:40,477 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:14:41,751 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 65