/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:26:37,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:26:37,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:26:37,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:26:37,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:26:37,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:26:37,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:26:37,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:26:37,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:26:37,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:26:37,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:26:37,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:26:37,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:26:37,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:26:37,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:26:37,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:26:37,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:26:37,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:26:37,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:26:37,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:26:37,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:26:37,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:26:37,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:26:37,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:26:37,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:26:37,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:26:37,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:26:37,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:26:37,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:26:37,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:26:37,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:26:37,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:26:37,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:26:37,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:26:37,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:26:37,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:26:37,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:26:37,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:26:37,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:26:37,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:26:37,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:26:37,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:26:37,682 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:26:37,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:26:37,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:26:37,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:26:37,684 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:26:37,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:26:37,685 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:26:37,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:26:37,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:26:37,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:26:37,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:26:37,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:26:37,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:26:37,686 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:26:37,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:26:37,687 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:26:37,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:26:37,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:26:37,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:26:37,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:26:37,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:26:37,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:26:37,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:26:37,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:26:37,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:26:37,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:26:37,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:26:37,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:26:37,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:26:37,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:26:38,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:26:38,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:26:38,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:26:38,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:26:38,115 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:26:38,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label30.c [2020-10-27 18:26:38,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b56b7915/d1754d495e28470d946be5c6f94968e3/FLAGe8b773c4b [2020-10-27 18:26:39,062 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:26:39,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label30.c [2020-10-27 18:26:39,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b56b7915/d1754d495e28470d946be5c6f94968e3/FLAGe8b773c4b [2020-10-27 18:26:39,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b56b7915/d1754d495e28470d946be5c6f94968e3 [2020-10-27 18:26:39,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:26:39,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:26:39,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:26:39,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:26:39,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:26:39,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:26:39" (1/1) ... [2020-10-27 18:26:39,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30643ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:39, skipping insertion in model container [2020-10-27 18:26:39,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:26:39" (1/1) ... [2020-10-27 18:26:39,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:26:39,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:26:40,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:26:40,271 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:26:40,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:26:40,550 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:26:40,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:40 WrapperNode [2020-10-27 18:26:40,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:26:40,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:26:40,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:26:40,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:26:40,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:40" (1/1) ... [2020-10-27 18:26:40,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:40" (1/1) ... [2020-10-27 18:26:40,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:40" (1/1) ... [2020-10-27 18:26:40,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:40" (1/1) ... [2020-10-27 18:26:40,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:40" (1/1) ... [2020-10-27 18:26:40,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:40" (1/1) ... [2020-10-27 18:26:40,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:40" (1/1) ... [2020-10-27 18:26:40,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:26:40,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:26:40,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:26:40,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:26:40,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:26:40,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:26:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:26:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:26:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:26:40,875 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:26:40,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:26:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:26:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:26:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:26:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:26:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:26:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:26:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:26:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:26:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:26:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:26:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:26:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:26:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:26:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:26:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:26:44,588 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:26:44,588 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:26:44,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:26:44 BoogieIcfgContainer [2020-10-27 18:26:44,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:26:44,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:26:44,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:26:44,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:26:44,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:26:39" (1/3) ... [2020-10-27 18:26:44,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55978337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:26:44, skipping insertion in model container [2020-10-27 18:26:44,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:26:40" (2/3) ... [2020-10-27 18:26:44,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55978337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:26:44, skipping insertion in model container [2020-10-27 18:26:44,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:26:44" (3/3) ... [2020-10-27 18:26:44,603 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label30.c [2020-10-27 18:26:44,619 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:26:44,626 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:26:44,643 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:26:44,682 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:26:44,683 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:26:44,683 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:26:44,683 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:26:44,684 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:26:44,684 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:26:44,684 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:26:44,684 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:26:44,719 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-27 18:26:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 18:26:44,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:44,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:26:44,728 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:44,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1307243393, now seen corresponding path program 1 times [2020-10-27 18:26:44,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:44,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420440355] [2020-10-27 18:26:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:44,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:45,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:45,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 18:26:45,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:45,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-27 18:26:45,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:26:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:26:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 18:26:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:26:45,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:45,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:45,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:45,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:45,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:45,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 18:26:45,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:26:45,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:26:45,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420440355] [2020-10-27 18:26:45,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:26:45,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:26:45,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622979638] [2020-10-27 18:26:45,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:26:45,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:45,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:26:45,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:26:45,953 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-27 18:26:55,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:26:55,471 INFO L93 Difference]: Finished difference Result 1208 states and 2172 transitions. [2020-10-27 18:26:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:26:55,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 18:26:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:26:55,502 INFO L225 Difference]: With dead ends: 1208 [2020-10-27 18:26:55,502 INFO L226 Difference]: Without dead ends: 703 [2020-10-27 18:26:55,516 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 [2020-10-27 18:26:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-27 18:26:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 697. [2020-10-27 18:26:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-27 18:26:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1016 transitions. [2020-10-27 18:26:55,689 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1016 transitions. Word has length 21 [2020-10-27 18:26:55,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:26:55,689 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1016 transitions. [2020-10-27 18:26:55,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:26:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1016 transitions. [2020-10-27 18:26:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 18:26:55,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:26:55,696 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:26:55,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:26:55,697 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:26:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:26:55,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1428891196, now seen corresponding path program 1 times [2020-10-27 18:26:55,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:26:55,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070810902] [2020-10-27 18:26:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:26:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:55,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:56,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:57,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:57,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:57,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 18:26:57,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:26:57,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1554 [2020-10-27 18:26:57,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:26:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 18:26:57,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:26:57,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:26:57,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:26:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:57,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:57,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:57,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:26:57,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:57,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 18:26:57,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:57,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:26:57,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:57,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:26:57,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:26:57,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:26:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:26:57,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:26:57,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:26:57,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:26:57,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:26:57,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 18:26:57,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:26:57,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:26:57,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:26:57,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:26:57,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:26:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:26:57,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070810902] [2020-10-27 18:26:57,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:26:57,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:26:57,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581402199] [2020-10-27 18:26:57,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:26:57,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:26:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:26:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:26:57,740 INFO L87 Difference]: Start difference. First operand 697 states and 1016 transitions. Second operand 5 states. [2020-10-27 18:27:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:05,463 INFO L93 Difference]: Finished difference Result 1714 states and 2604 transitions. [2020-10-27 18:27:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:05,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2020-10-27 18:27:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:05,476 INFO L225 Difference]: With dead ends: 1714 [2020-10-27 18:27:05,476 INFO L226 Difference]: Without dead ends: 1023 [2020-10-27 18:27:05,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:27:05,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2020-10-27 18:27:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1019. [2020-10-27 18:27:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2020-10-27 18:27:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1397 transitions. [2020-10-27 18:27:05,565 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1397 transitions. Word has length 100 [2020-10-27 18:27:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:05,567 INFO L481 AbstractCegarLoop]: Abstraction has 1019 states and 1397 transitions. [2020-10-27 18:27:05,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:27:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1397 transitions. [2020-10-27 18:27:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 18:27:05,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:05,584 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:27:05,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:27:05,585 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:05,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2091607882, now seen corresponding path program 1 times [2020-10-27 18:27:05,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:05,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233109917] [2020-10-27 18:27:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:05,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:06,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:07,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:07,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 18:27:07,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:27:07,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1627 [2020-10-27 18:27:07,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:07,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:07,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 18:27:07,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:27:07,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:07,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:07,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:07,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:07,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:07,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:07,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:27:07,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:07,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:07,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:07,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:07,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:07,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:07,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:07,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:07,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:27:07,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:07,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 18:27:07,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:07,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:07,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:07,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 18:27:07,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:27:07,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233109917] [2020-10-27 18:27:07,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:07,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:27:07,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046942776] [2020-10-27 18:27:07,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:27:07,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:07,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:27:07,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:27:07,874 INFO L87 Difference]: Start difference. First operand 1019 states and 1397 transitions. Second operand 5 states. [2020-10-27 18:27:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:18,159 INFO L93 Difference]: Finished difference Result 2349 states and 3362 transitions. [2020-10-27 18:27:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:18,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2020-10-27 18:27:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:18,180 INFO L225 Difference]: With dead ends: 2349 [2020-10-27 18:27:18,181 INFO L226 Difference]: Without dead ends: 1336 [2020-10-27 18:27:18,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:27:18,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2020-10-27 18:27:18,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1332. [2020-10-27 18:27:18,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2020-10-27 18:27:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1767 transitions. [2020-10-27 18:27:18,243 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1767 transitions. Word has length 137 [2020-10-27 18:27:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:18,246 INFO L481 AbstractCegarLoop]: Abstraction has 1332 states and 1767 transitions. [2020-10-27 18:27:18,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:27:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1767 transitions. [2020-10-27 18:27:18,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 18:27:18,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:18,257 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:27:18,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:27:18,257 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash -815115183, now seen corresponding path program 1 times [2020-10-27 18:27:18,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:18,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585151629] [2020-10-27 18:27:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:18,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:18,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:19,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:19,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:19,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:19,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 18:27:19,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:27:19,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1536 [2020-10-27 18:27:19,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 132 [2020-10-27 18:27:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 18:27:19,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:19,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:19,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:19,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:19,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:19,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:27:20,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:20,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:20,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:20,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:20,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:20,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:20,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:20,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:20,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:27:20,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:20,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 18:27:20,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:20,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:20,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:20,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 18:27:20,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:27:20,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585151629] [2020-10-27 18:27:20,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:20,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:27:20,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469855427] [2020-10-27 18:27:20,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:27:20,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:20,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:27:20,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:27:20,274 INFO L87 Difference]: Start difference. First operand 1332 states and 1767 transitions. Second operand 5 states. [2020-10-27 18:27:28,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:28,239 INFO L93 Difference]: Finished difference Result 3917 states and 5272 transitions. [2020-10-27 18:27:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:28,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-10-27 18:27:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:28,257 INFO L225 Difference]: With dead ends: 3917 [2020-10-27 18:27:28,257 INFO L226 Difference]: Without dead ends: 2591 [2020-10-27 18:27:28,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:27:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2020-10-27 18:27:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2576. [2020-10-27 18:27:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2576 states. [2020-10-27 18:27:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 3407 transitions. [2020-10-27 18:27:28,351 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 3407 transitions. Word has length 144 [2020-10-27 18:27:28,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:28,352 INFO L481 AbstractCegarLoop]: Abstraction has 2576 states and 3407 transitions. [2020-10-27 18:27:28,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:27:28,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 3407 transitions. [2020-10-27 18:27:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-27 18:27:28,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:28,355 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:27:28,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:27:28,355 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:28,356 INFO L82 PathProgramCache]: Analyzing trace with hash -141786108, now seen corresponding path program 1 times [2020-10-27 18:27:28,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:28,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527109700] [2020-10-27 18:27:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:28,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:28,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:29,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:29,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 18:27:29,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:27:29,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1299 [2020-10-27 18:27:29,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:29,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:29,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 18:27:29,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:27:29,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:29,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:29,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:29,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:29,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:29,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:29,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:27:29,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:29,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:29,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:29,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:29,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:29,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:29,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:30,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:30,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:27:30,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:30,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 18:27:30,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:30,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:30,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:30,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 18:27:30,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:27:30,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527109700] [2020-10-27 18:27:30,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:30,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:27:30,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143394968] [2020-10-27 18:27:30,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:27:30,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:27:30,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:27:30,228 INFO L87 Difference]: Start difference. First operand 2576 states and 3407 transitions. Second operand 5 states. [2020-10-27 18:27:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:42,544 INFO L93 Difference]: Finished difference Result 7008 states and 9442 transitions. [2020-10-27 18:27:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:27:42,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-10-27 18:27:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:42,571 INFO L225 Difference]: With dead ends: 7008 [2020-10-27 18:27:42,571 INFO L226 Difference]: Without dead ends: 4438 [2020-10-27 18:27:42,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:27:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2020-10-27 18:27:42,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 4432. [2020-10-27 18:27:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4432 states. [2020-10-27 18:27:42,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 5481 transitions. [2020-10-27 18:27:42,721 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 5481 transitions. Word has length 150 [2020-10-27 18:27:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:42,721 INFO L481 AbstractCegarLoop]: Abstraction has 4432 states and 5481 transitions. [2020-10-27 18:27:42,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:27:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 5481 transitions. [2020-10-27 18:27:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 18:27:42,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:42,725 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:27:42,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:27:42,725 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:42,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:42,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1775529738, now seen corresponding path program 1 times [2020-10-27 18:27:42,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:42,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114610439] [2020-10-27 18:27:42,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:42,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:42,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:43,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:43,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:44,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:44,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 18:27:44,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:27:44,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1626 [2020-10-27 18:27:44,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:44,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:44,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 143 [2020-10-27 18:27:44,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 18:27:44,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:44,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:44,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:44,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:44,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:44,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:44,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 18:27:44,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:44,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:44,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:44,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:44,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:44,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:44,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:44,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:44,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 18:27:44,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:44,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 18:27:44,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:44,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 18:27:44,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:27:44,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114610439] [2020-10-27 18:27:44,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:27:44,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:27:44,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253176712] [2020-10-27 18:27:44,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:27:44,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:27:44,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:27:44,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:27:44,937 INFO L87 Difference]: Start difference. First operand 4432 states and 5481 transitions. Second operand 6 states. [2020-10-27 18:27:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:27:57,018 INFO L93 Difference]: Finished difference Result 10416 states and 13263 transitions. [2020-10-27 18:27:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:27:57,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2020-10-27 18:27:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:27:57,057 INFO L225 Difference]: With dead ends: 10416 [2020-10-27 18:27:57,057 INFO L226 Difference]: Without dead ends: 5990 [2020-10-27 18:27:57,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:27:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2020-10-27 18:27:57,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5676. [2020-10-27 18:27:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5676 states. [2020-10-27 18:27:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5676 states to 5676 states and 7041 transitions. [2020-10-27 18:27:57,284 INFO L78 Accepts]: Start accepts. Automaton has 5676 states and 7041 transitions. Word has length 155 [2020-10-27 18:27:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:27:57,285 INFO L481 AbstractCegarLoop]: Abstraction has 5676 states and 7041 transitions. [2020-10-27 18:27:57,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:27:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 5676 states and 7041 transitions. [2020-10-27 18:27:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-27 18:27:57,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:27:57,291 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:27:57,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:27:57,292 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:27:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:27:57,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1121477571, now seen corresponding path program 1 times [2020-10-27 18:27:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:27:57,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915989223] [2020-10-27 18:27:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:27:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:57,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:57,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:58,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:59,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:59,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-27 18:27:59,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:27:59,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1807 [2020-10-27 18:27:59,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:59,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:59,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 132 [2020-10-27 18:27:59,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 18:27:59,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:27:59,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:27:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:59,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:59,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:59,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:27:59,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:59,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:27:59,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:59,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:27:59,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:59,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:27:59,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:59,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:27:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:59,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:59,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:59,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:27:59,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:59,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-27 18:27:59,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:59,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:27:59,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:27:59,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 18:27:59,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:27:59,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-27 18:27:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:27:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:27:59,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:27:59,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:27:59,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:27:59,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 18:27:59,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:27:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:27:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:27:59,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 18:27:59,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:28:00,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915989223] [2020-10-27 18:28:00,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:28:00,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:28:00,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884463142] [2020-10-27 18:28:00,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:28:00,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:00,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:28:00,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:28:00,141 INFO L87 Difference]: Start difference. First operand 5676 states and 7041 transitions. Second operand 7 states. [2020-10-27 18:28:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:28:11,502 INFO L93 Difference]: Finished difference Result 11785 states and 15255 transitions. [2020-10-27 18:28:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 18:28:11,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 220 [2020-10-27 18:28:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:28:11,542 INFO L225 Difference]: With dead ends: 11785 [2020-10-27 18:28:11,542 INFO L226 Difference]: Without dead ends: 6115 [2020-10-27 18:28:11,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 18:28:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2020-10-27 18:28:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 6031. [2020-10-27 18:28:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6031 states. [2020-10-27 18:28:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 7529 transitions. [2020-10-27 18:28:11,769 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 7529 transitions. Word has length 220 [2020-10-27 18:28:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:28:11,770 INFO L481 AbstractCegarLoop]: Abstraction has 6031 states and 7529 transitions. [2020-10-27 18:28:11,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:28:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 7529 transitions. [2020-10-27 18:28:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 18:28:11,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:28:11,777 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:28:11,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:28:11,777 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:28:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:28:11,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1695696761, now seen corresponding path program 1 times [2020-10-27 18:28:11,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:28:11,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375475757] [2020-10-27 18:28:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:28:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:11,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:12,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:12,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:12,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:16,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:16,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:16,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-27 18:28:16,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:28:16,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 18:28:16,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 214 [2020-10-27 18:28:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:28:16,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:17,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:28:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:17,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:17,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:17,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:28:17,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:17,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:28:17,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:17,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:17,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:17,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:17,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:17,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:28:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:17,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:17,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:17,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:28:17,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:17,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 18:28:17,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:17,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:17,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:17,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:17,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:28:17,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 18:28:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:17,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:17,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:17,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 18:28:17,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:17,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-27 18:28:17,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:17,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:17,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 114 [2020-10-27 18:28:17,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:28:17,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:28:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-27 18:28:17,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375475757] [2020-10-27 18:28:17,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:28:17,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 18:28:17,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638868420] [2020-10-27 18:28:17,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:28:17,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:17,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:28:17,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:28:17,495 INFO L87 Difference]: Start difference. First operand 6031 states and 7529 transitions. Second operand 5 states. [2020-10-27 18:28:29,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:28:29,798 INFO L93 Difference]: Finished difference Result 15470 states and 19916 transitions. [2020-10-27 18:28:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:28:29,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-10-27 18:28:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:28:29,850 INFO L225 Difference]: With dead ends: 15470 [2020-10-27 18:28:29,850 INFO L226 Difference]: Without dead ends: 9445 [2020-10-27 18:28:29,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:28:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2020-10-27 18:28:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 9441. [2020-10-27 18:28:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9441 states. [2020-10-27 18:28:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 12051 transitions. [2020-10-27 18:28:30,124 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 12051 transitions. Word has length 225 [2020-10-27 18:28:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:28:30,125 INFO L481 AbstractCegarLoop]: Abstraction has 9441 states and 12051 transitions. [2020-10-27 18:28:30,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:28:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 12051 transitions. [2020-10-27 18:28:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-27 18:28:30,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:28:30,134 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:28:30,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:28:30,135 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:28:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:28:30,136 INFO L82 PathProgramCache]: Analyzing trace with hash -532016236, now seen corresponding path program 1 times [2020-10-27 18:28:30,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:28:30,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465954749] [2020-10-27 18:28:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:28:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:30,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:30,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:31,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:32,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:32,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-27 18:28:32,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:28:32,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2639 [2020-10-27 18:28:32,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:32,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-27 18:28:32,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 18:28:32,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:33,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:28:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:33,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:33,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:33,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:28:33,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:33,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:28:33,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:33,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:33,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:33,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:33,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:33,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:28:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:33,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:33,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:33,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 18:28:33,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:33,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 18:28:33,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:33,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:33,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:33,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 18:28:33,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:33,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-10-27 18:28:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:33,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:33,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:33,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:28:33,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:33,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 18:28:33,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:28:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 18:28:33,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:28:33,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465954749] [2020-10-27 18:28:33,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:28:33,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:28:33,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829341689] [2020-10-27 18:28:33,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:28:33,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:33,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:28:33,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:28:33,855 INFO L87 Difference]: Start difference. First operand 9441 states and 12051 transitions. Second operand 7 states. [2020-10-27 18:28:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:28:53,476 INFO L93 Difference]: Finished difference Result 24649 states and 33410 transitions. [2020-10-27 18:28:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:28:53,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 240 [2020-10-27 18:28:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:28:53,555 INFO L225 Difference]: With dead ends: 24649 [2020-10-27 18:28:53,555 INFO L226 Difference]: Without dead ends: 15214 [2020-10-27 18:28:53,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:28:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15214 states. [2020-10-27 18:28:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15214 to 15129. [2020-10-27 18:28:54,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15129 states. [2020-10-27 18:28:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15129 states to 15129 states and 19557 transitions. [2020-10-27 18:28:54,199 INFO L78 Accepts]: Start accepts. Automaton has 15129 states and 19557 transitions. Word has length 240 [2020-10-27 18:28:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:28:54,200 INFO L481 AbstractCegarLoop]: Abstraction has 15129 states and 19557 transitions. [2020-10-27 18:28:54,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:28:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 15129 states and 19557 transitions. [2020-10-27 18:28:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-27 18:28:54,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:28:54,212 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 18:28:54,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:28:54,212 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:28:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:28:54,214 INFO L82 PathProgramCache]: Analyzing trace with hash 975161069, now seen corresponding path program 1 times [2020-10-27 18:28:54,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:28:54,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985854152] [2020-10-27 18:28:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:28:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:54,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:54,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:56,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:56,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-27 18:28:56,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:28:56,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2191 [2020-10-27 18:28:56,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:28:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 252 [2020-10-27 18:28:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:28:56,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:56,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:28:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:56,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:56,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:56,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:28:56,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:56,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:28:56,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:56,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:56,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:56,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:56,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:56,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:28:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:56,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:56,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:28:56,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:56,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 18:28:56,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:56,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:28:56,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:56,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:28:56,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:56,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-27 18:28:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:28:56,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:28:56,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:28:56,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 18:28:56,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:28:56,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 18:28:56,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:28:56,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:28:56,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:28:56,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 18:28:56,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:28:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-27 18:28:57,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985854152] [2020-10-27 18:28:57,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:28:57,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:28:57,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325483808] [2020-10-27 18:28:57,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:28:57,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:28:57,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:28:57,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:28:57,080 INFO L87 Difference]: Start difference. First operand 15129 states and 19557 transitions. Second operand 5 states. [2020-10-27 18:29:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:29:16,445 INFO L93 Difference]: Finished difference Result 36884 states and 48108 transitions. [2020-10-27 18:29:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:29:16,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2020-10-27 18:29:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:29:16,546 INFO L225 Difference]: With dead ends: 36884 [2020-10-27 18:29:16,546 INFO L226 Difference]: Without dead ends: 22068 [2020-10-27 18:29:16,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:29:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22068 states. [2020-10-27 18:29:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22068 to 21747. [2020-10-27 18:29:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21747 states. [2020-10-27 18:29:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21747 states to 21747 states and 28386 transitions. [2020-10-27 18:29:17,183 INFO L78 Accepts]: Start accepts. Automaton has 21747 states and 28386 transitions. Word has length 261 [2020-10-27 18:29:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:29:17,185 INFO L481 AbstractCegarLoop]: Abstraction has 21747 states and 28386 transitions. [2020-10-27 18:29:17,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:29:17,185 INFO L276 IsEmpty]: Start isEmpty. Operand 21747 states and 28386 transitions. [2020-10-27 18:29:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-27 18:29:17,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:29:17,197 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:29:17,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:29:17,198 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:29:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:29:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1418899586, now seen corresponding path program 1 times [2020-10-27 18:29:17,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:29:17,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142600425] [2020-10-27 18:29:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:29:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:17,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:18,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:19,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:19,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:19,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-27 18:29:19,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:29:19,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2608 [2020-10-27 18:29:19,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:19,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:29:19,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 261 [2020-10-27 18:29:19,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:29:19,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:20,085 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-27 18:29:20,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:29:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:20,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:20,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:20,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:29:20,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:20,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:29:20,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:20,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:20,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:20,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:20,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:20,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:29:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:20,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:20,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:20,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-27 18:29:20,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:20,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-27 18:29:20,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:20,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:29:20,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:20,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 246 [2020-10-27 18:29:20,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:29:20,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142600425] [2020-10-27 18:29:20,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:29:20,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:29:20,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167786219] [2020-10-27 18:29:20,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:29:20,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:29:20,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:29:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:29:20,649 INFO L87 Difference]: Start difference. First operand 21747 states and 28386 transitions. Second operand 5 states. [2020-10-27 18:29:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:29:31,015 INFO L93 Difference]: Finished difference Result 43185 states and 56457 transitions. [2020-10-27 18:29:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:29:31,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 272 [2020-10-27 18:29:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:29:31,089 INFO L225 Difference]: With dead ends: 43185 [2020-10-27 18:29:31,089 INFO L226 Difference]: Without dead ends: 21751 [2020-10-27 18:29:31,125 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 [2020-10-27 18:29:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21751 states. [2020-10-27 18:29:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21751 to 21133. [2020-10-27 18:29:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21133 states. [2020-10-27 18:29:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 27023 transitions. [2020-10-27 18:29:31,631 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 27023 transitions. Word has length 272 [2020-10-27 18:29:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:29:31,632 INFO L481 AbstractCegarLoop]: Abstraction has 21133 states and 27023 transitions. [2020-10-27 18:29:31,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:29:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 27023 transitions. [2020-10-27 18:29:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-27 18:29:31,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:29:31,647 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 18:29:31,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:29:31,648 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:29:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:29:31,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1140121756, now seen corresponding path program 1 times [2020-10-27 18:29:31,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:29:31,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057913322] [2020-10-27 18:29:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:29:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:31,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:31,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:32,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:32,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:32,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:33,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:34,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:35,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:35,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:36,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:36,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 365 [2020-10-27 18:29:36,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 18:29:36,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 18:29:36,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:36,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:29:36,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 263 [2020-10-27 18:29:36,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 18:29:36,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:36,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:29:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:36,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:36,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:36,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:29:36,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:36,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:29:36,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:36,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:36,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:36,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:36,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:36,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:29:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:36,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:36,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:36,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:29:36,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:36,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 18:29:36,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:36,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:37,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:29:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:37,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:37,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:37,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:37,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 18:29:37,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:29:37,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 18:29:37,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:37,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:29:37,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 150 [2020-10-27 18:29:37,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:29:37,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:37,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-10-27 18:29:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:37,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:37,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:37,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:29:37,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:37,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 18:29:37,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:37,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:29:37,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:29:37,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 18:29:37,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 18:29:37,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057913322] [2020-10-27 18:29:37,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:29:37,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:29:37,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019794776] [2020-10-27 18:29:37,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:29:37,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:29:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:29:37,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:29:37,544 INFO L87 Difference]: Start difference. First operand 21133 states and 27023 transitions. Second operand 8 states. [2020-10-27 18:29:37,753 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 18:29:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:29:50,464 INFO L93 Difference]: Finished difference Result 42445 states and 55685 transitions. [2020-10-27 18:29:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 18:29:50,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 349 [2020-10-27 18:29:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:29:50,547 INFO L225 Difference]: With dead ends: 42445 [2020-10-27 18:29:50,548 INFO L226 Difference]: Without dead ends: 21625 [2020-10-27 18:29:50,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 18:29:50,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21625 states. [2020-10-27 18:29:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21625 to 21190. [2020-10-27 18:29:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21190 states. [2020-10-27 18:29:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21190 states to 21190 states and 27229 transitions. [2020-10-27 18:29:51,275 INFO L78 Accepts]: Start accepts. Automaton has 21190 states and 27229 transitions. Word has length 349 [2020-10-27 18:29:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:29:51,276 INFO L481 AbstractCegarLoop]: Abstraction has 21190 states and 27229 transitions. [2020-10-27 18:29:51,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:29:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 21190 states and 27229 transitions. [2020-10-27 18:29:51,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-27 18:29:51,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:29:51,307 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 18:29:51,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:29:51,307 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:29:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:29:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1351200208, now seen corresponding path program 1 times [2020-10-27 18:29:51,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:29:51,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760997864] [2020-10-27 18:29:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:29:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:51,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:51,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:51,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:52,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:52,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:53,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:55,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:56,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:56,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:56,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 368 [2020-10-27 18:29:56,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 18:29:56,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 18:29:56,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:56,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:29:56,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 345 [2020-10-27 18:29:56,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:29:56,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:56,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:29:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:56,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:56,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:56,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:29:56,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:56,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 18:29:56,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:56,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:56,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:29:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:56,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:56,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:56,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:29:56,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:56,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 18:29:56,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:56,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:56,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:56,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:56,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:56,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:29:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:56,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:56,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:56,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:29:56,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:56,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 18:29:56,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:56,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:29:56,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:29:56,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:56,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-10-27 18:29:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:29:56,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:29:56,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:29:56,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 18:29:56,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:29:56,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 18:29:56,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:29:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:29:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:29:56,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 18:29:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:29:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-10-27 18:29:56,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760997864] [2020-10-27 18:29:56,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:29:56,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:29:56,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335491261] [2020-10-27 18:29:56,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:29:56,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:29:56,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:29:56,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:29:56,943 INFO L87 Difference]: Start difference. First operand 21190 states and 27229 transitions. Second operand 5 states. [2020-10-27 18:30:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:30:13,711 INFO L93 Difference]: Finished difference Result 48527 states and 62439 transitions. [2020-10-27 18:30:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:30:13,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 352 [2020-10-27 18:30:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:30:13,819 INFO L225 Difference]: With dead ends: 48527 [2020-10-27 18:30:13,819 INFO L226 Difference]: Without dead ends: 27650 [2020-10-27 18:30:13,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:30:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27650 states. [2020-10-27 18:30:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27650 to 21196. [2020-10-27 18:30:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21196 states. [2020-10-27 18:30:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21196 states to 21196 states and 27135 transitions. [2020-10-27 18:30:14,455 INFO L78 Accepts]: Start accepts. Automaton has 21196 states and 27135 transitions. Word has length 352 [2020-10-27 18:30:14,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:30:14,456 INFO L481 AbstractCegarLoop]: Abstraction has 21196 states and 27135 transitions. [2020-10-27 18:30:14,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:30:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 21196 states and 27135 transitions. [2020-10-27 18:30:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-27 18:30:14,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:30:14,474 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 18:30:14,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 18:30:14,475 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:30:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:30:14,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1011075222, now seen corresponding path program 1 times [2020-10-27 18:30:14,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:30:14,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734730217] [2020-10-27 18:30:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:30:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:14,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:14,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:15,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:15,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:18,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:19,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:19,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 393 [2020-10-27 18:30:19,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:30:19,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 18:30:19,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:19,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:30:19,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 292 [2020-10-27 18:30:19,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 18:30:19,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:19,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:30:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:19,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:19,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:19,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:30:19,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:19,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:30:19,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:19,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:30:19,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:30:19,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:30:19,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:19,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:30:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:19,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:19,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:19,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:30:19,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:19,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 18:30:19,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:19,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:30:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:30:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:30:19,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:19,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:30:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:19,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:19,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:19,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 18:30:19,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:19,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 18:30:19,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:19,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:30:19,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:30:19,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-27 18:30:19,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:20,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-10-27 18:30:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:30:20,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:30:20,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:30:20,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:30:20,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:30:20,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 18:30:20,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:30:20,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:30:20,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:30:20,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 18:30:20,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:30:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 18:30:20,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734730217] [2020-10-27 18:30:20,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:30:20,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:30:20,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810141709] [2020-10-27 18:30:20,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:30:20,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:30:20,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:30:20,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:30:20,309 INFO L87 Difference]: Start difference. First operand 21196 states and 27135 transitions. Second operand 7 states. [2020-10-27 18:30:24,543 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 65