/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:03:17,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:03:17,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:03:17,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:03:17,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:03:17,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:03:17,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:03:17,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:03:17,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:03:17,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:03:17,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:03:17,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:03:17,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:03:17,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:03:17,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:03:17,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:03:17,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:03:17,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:03:17,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:03:17,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:03:17,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:03:17,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:03:17,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:03:17,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:03:17,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:03:17,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:03:17,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:03:17,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:03:17,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:03:17,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:03:17,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:03:17,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:03:17,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:03:17,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:03:17,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:03:17,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:03:17,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:03:17,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:03:17,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:03:17,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:03:17,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:03:17,648 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 19:03:17,707 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:03:17,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:03:17,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:03:17,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:03:17,713 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:03:17,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:03:17,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:03:17,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:03:17,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:03:17,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:03:17,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:03:17,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:03:17,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:03:17,717 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:03:17,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:03:17,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:03:17,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:03:17,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:03:17,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:03:17,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:03:17,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:03:17,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:03:17,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:03:17,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:03:17,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:03:17,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:03:17,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:03:17,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:03:17,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:03:17,720 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:03:18,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:03:18,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:03:18,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:03:18,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:03:18,188 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:03:18,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label58.c [2020-10-27 19:03:18,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2bdaa913e/3e7ea01aaded49aca427ba48e8b0991a/FLAGb5e548020 [2020-10-27 19:03:19,343 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:03:19,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label58.c [2020-10-27 19:03:19,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2bdaa913e/3e7ea01aaded49aca427ba48e8b0991a/FLAGb5e548020 [2020-10-27 19:03:19,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2bdaa913e/3e7ea01aaded49aca427ba48e8b0991a [2020-10-27 19:03:19,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:03:19,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:03:19,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:03:19,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:03:19,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:03:19,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:03:19" (1/1) ... [2020-10-27 19:03:19,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b560c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:19, skipping insertion in model container [2020-10-27 19:03:19,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:03:19" (1/1) ... [2020-10-27 19:03:19,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:03:20,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:03:21,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:03:21,106 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:03:21,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:03:21,635 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:03:21,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:21 WrapperNode [2020-10-27 19:03:21,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:03:21,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:03:21,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:03:21,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:03:21,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:21" (1/1) ... [2020-10-27 19:03:21,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:21" (1/1) ... [2020-10-27 19:03:21,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:21" (1/1) ... [2020-10-27 19:03:21,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:21" (1/1) ... [2020-10-27 19:03:21,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:21" (1/1) ... [2020-10-27 19:03:21,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:21" (1/1) ... [2020-10-27 19:03:22,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:21" (1/1) ... [2020-10-27 19:03:22,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:03:22,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:03:22,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:03:22,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:03:22,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:21" (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 19:03:22,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:03:22,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:03:22,186 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:03:22,186 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:03:22,186 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:03:22,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:03:22,187 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:03:22,187 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:03:22,187 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:03:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:03:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:03:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:03:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:03:22,190 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:03:22,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:03:22,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:03:22,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:03:22,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:03:22,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:03:22,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:03:22,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:03:31,631 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:03:31,631 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:03:31,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:03:31 BoogieIcfgContainer [2020-10-27 19:03:31,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:03:31,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:03:31,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:03:31,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:03:31,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:03:19" (1/3) ... [2020-10-27 19:03:31,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d892c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:03:31, skipping insertion in model container [2020-10-27 19:03:31,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:03:21" (2/3) ... [2020-10-27 19:03:31,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d892c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:03:31, skipping insertion in model container [2020-10-27 19:03:31,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:03:31" (3/3) ... [2020-10-27 19:03:31,649 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label58.c [2020-10-27 19:03:31,663 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:03:31,670 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:03:31,685 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:03:31,721 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:03:31,721 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:03:31,721 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:03:31,722 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:03:31,722 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:03:31,722 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:03:31,722 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:03:31,722 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:03:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 19:03:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 19:03:31,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:03:31,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:03:31,766 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:03:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:03:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1189231218, now seen corresponding path program 1 times [2020-10-27 19:03:31,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:03:31,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372389168] [2020-10-27 19:03:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:03:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:32,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:32,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:32,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 19:03:32,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:32,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-27 19:03:32,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:03:32,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:03:32,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 19:03:32,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:03:32,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:03:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:32,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:33,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:33,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:03:33,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:33,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 19:03:33,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:33,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:03:33,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:03:33,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:03:33,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:33,060 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 19:03:33,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372389168] [2020-10-27 19:03:33,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:03:33,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:03:33,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303264727] [2020-10-27 19:03:33,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:03:33,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:03:33,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:03:33,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:03:33,100 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 19:03:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:03:47,055 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 19:03:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:03:47,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-27 19:03:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:03:47,094 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 19:03:47,094 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 19:03:47,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:03:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 19:03:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 19:03:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 19:03:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 19:03:47,255 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 52 [2020-10-27 19:03:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:03:47,256 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 19:03:47,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:03:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 19:03:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 19:03:47,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:03:47,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:03:47,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:03:47,264 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:03:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:03:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash 372999698, now seen corresponding path program 1 times [2020-10-27 19:03:47,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:03:47,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184967936] [2020-10-27 19:03:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:03:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:47,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:47,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:48,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:48,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 19:03:48,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:03:48,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1624 [2020-10-27 19:03:48,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:48,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:03:48,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 19:03:48,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:03:48,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:03:49,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:03:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:49,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:49,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:49,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:03:49,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:49,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:03:49,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:49,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:03:49,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:03:49,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:03:49,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:03:49,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:03:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:49,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:49,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:49,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:03:49,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:49,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 19:03:49,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:49,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:03:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:03:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 19:03:49,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:03:49,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184967936] [2020-10-27 19:03:49,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:03:49,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:03:49,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222051506] [2020-10-27 19:03:49,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:03:49,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:03:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:03:49,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:03:49,409 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 5 states. [2020-10-27 19:04:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:04:02,390 INFO L93 Difference]: Finished difference Result 2886 states and 4481 transitions. [2020-10-27 19:04:02,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:04:02,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2020-10-27 19:04:02,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:04:02,404 INFO L225 Difference]: With dead ends: 2886 [2020-10-27 19:04:02,404 INFO L226 Difference]: Without dead ends: 1889 [2020-10-27 19:04:02,408 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 19:04:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2020-10-27 19:04:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1885. [2020-10-27 19:04:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-27 19:04:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2588 transitions. [2020-10-27 19:04:02,481 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2588 transitions. Word has length 123 [2020-10-27 19:04:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:04:02,482 INFO L481 AbstractCegarLoop]: Abstraction has 1885 states and 2588 transitions. [2020-10-27 19:04:02,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:04:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2588 transitions. [2020-10-27 19:04:02,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 19:04:02,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:04:02,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:04:02,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:04:02,487 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:04:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:04:02,488 INFO L82 PathProgramCache]: Analyzing trace with hash -857425441, now seen corresponding path program 1 times [2020-10-27 19:04:02,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:04:02,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660868689] [2020-10-27 19:04:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:04:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:02,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:02,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:03,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:03,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 19:04:03,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:04:03,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1261 [2020-10-27 19:04:03,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:03,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:04:03,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 19:04:03,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:04:03,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:03,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:04:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:03,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:03,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:03,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:04:03,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:03,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:04:03,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:04:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:04:03,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:03,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:04:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:04,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:04,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:04,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 19:04:04,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:04,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 19:04:04,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:04,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:04:04,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:04,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 19:04:04,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:04:04,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660868689] [2020-10-27 19:04:04,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:04:04,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:04:04,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803384384] [2020-10-27 19:04:04,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:04:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:04:04,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:04:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:04:04,183 INFO L87 Difference]: Start difference. First operand 1885 states and 2588 transitions. Second operand 5 states. [2020-10-27 19:04:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:04:15,678 INFO L93 Difference]: Finished difference Result 4661 states and 6590 transitions. [2020-10-27 19:04:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:04:15,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-27 19:04:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:04:15,698 INFO L225 Difference]: With dead ends: 4661 [2020-10-27 19:04:15,698 INFO L226 Difference]: Without dead ends: 2782 [2020-10-27 19:04:15,704 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 19:04:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2020-10-27 19:04:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 2776. [2020-10-27 19:04:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2776 states. [2020-10-27 19:04:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 3664 transitions. [2020-10-27 19:04:15,799 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 3664 transitions. Word has length 126 [2020-10-27 19:04:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:04:15,800 INFO L481 AbstractCegarLoop]: Abstraction has 2776 states and 3664 transitions. [2020-10-27 19:04:15,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:04:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 3664 transitions. [2020-10-27 19:04:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 19:04:15,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:04:15,804 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:04:15,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:04:15,804 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:04:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:04:15,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1103998846, now seen corresponding path program 1 times [2020-10-27 19:04:15,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:04:15,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254459422] [2020-10-27 19:04:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:04:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:16,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:16,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 19:04:16,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:16,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-27 19:04:16,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:16,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:04:16,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:04:16,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 19:04:16,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 52 [2020-10-27 19:04:16,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:04:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:16,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:16,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:16,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:04:16,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:16,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 19:04:16,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:16,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:04:16,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:16,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:04:16,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:16,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:04:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:16,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:16,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:16,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:04:16,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:16,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 19:04:16,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:04:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:04:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 19:04:16,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:04:17,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254459422] [2020-10-27 19:04:17,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:04:17,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:04:17,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548258420] [2020-10-27 19:04:17,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:04:17,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:04:17,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:04:17,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:04:17,042 INFO L87 Difference]: Start difference. First operand 2776 states and 3664 transitions. Second operand 7 states. [2020-10-27 19:04:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:04:30,376 INFO L93 Difference]: Finished difference Result 8253 states and 10998 transitions. [2020-10-27 19:04:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:04:30,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-27 19:04:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:04:30,398 INFO L225 Difference]: With dead ends: 8253 [2020-10-27 19:04:30,398 INFO L226 Difference]: Without dead ends: 3716 [2020-10-27 19:04:30,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:04:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2020-10-27 19:04:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3704. [2020-10-27 19:04:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3704 states. [2020-10-27 19:04:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 4390 transitions. [2020-10-27 19:04:30,527 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 4390 transitions. Word has length 131 [2020-10-27 19:04:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:04:30,527 INFO L481 AbstractCegarLoop]: Abstraction has 3704 states and 4390 transitions. [2020-10-27 19:04:30,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:04:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 4390 transitions. [2020-10-27 19:04:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-27 19:04:30,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:04:30,532 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 19:04:30,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:04:30,532 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:04:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:04:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1893310546, now seen corresponding path program 1 times [2020-10-27 19:04:30,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:04:30,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970833530] [2020-10-27 19:04:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:04:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:30,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:32,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:32,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-27 19:04:32,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:04:32,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1417 [2020-10-27 19:04:32,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:32,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:04:32,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-10-27 19:04:32,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:04:32,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:32,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:04:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:32,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:32,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:32,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:04:32,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:32,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:04:32,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:04:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:04:32,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:32,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:04:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:32,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:32,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:32,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:04:32,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:32,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 19:04:32,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:04:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:04:32,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:32,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:04:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:32,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:32,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:32,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 19:04:32,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:32,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 19:04:32,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:32,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:04:32,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:32,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 19:04:32,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-27 19:04:32,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970833530] [2020-10-27 19:04:32,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:04:32,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:04:32,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994703457] [2020-10-27 19:04:32,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:04:32,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:04:32,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:04:32,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:04:32,510 INFO L87 Difference]: Start difference. First operand 3704 states and 4390 transitions. Second operand 6 states. [2020-10-27 19:04:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:04:45,939 INFO L93 Difference]: Finished difference Result 7839 states and 9495 transitions. [2020-10-27 19:04:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:04:45,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 212 [2020-10-27 19:04:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:04:45,963 INFO L225 Difference]: With dead ends: 7839 [2020-10-27 19:04:45,964 INFO L226 Difference]: Without dead ends: 4141 [2020-10-27 19:04:45,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:04:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2020-10-27 19:04:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 4137. [2020-10-27 19:04:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4137 states. [2020-10-27 19:04:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4137 states to 4137 states and 5089 transitions. [2020-10-27 19:04:46,093 INFO L78 Accepts]: Start accepts. Automaton has 4137 states and 5089 transitions. Word has length 212 [2020-10-27 19:04:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:04:46,094 INFO L481 AbstractCegarLoop]: Abstraction has 4137 states and 5089 transitions. [2020-10-27 19:04:46,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:04:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 4137 states and 5089 transitions. [2020-10-27 19:04:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-27 19:04:46,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:04:46,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:04:46,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:04:46,098 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:04:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:04:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash 892591690, now seen corresponding path program 1 times [2020-10-27 19:04:46,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:04:46,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119520618] [2020-10-27 19:04:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:04:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:46,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:46,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:46,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:48,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:51,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:51,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-27 19:04:51,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:04:51,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 19:04:51,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:04:51,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-27 19:04:51,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:04:51,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:51,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:04:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:51,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:51,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:51,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:04:51,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:51,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:04:51,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:04:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:04:51,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:51,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:04:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:51,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:51,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:51,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:04:51,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:51,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 19:04:51,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:51,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:04:51,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:04:51,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:51,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:04:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:51,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:51,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:51,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 19:04:51,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:51,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 19:04:51,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:51,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:04:51,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:51,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 19:04:51,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 19:04:51,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119520618] [2020-10-27 19:04:51,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:04:51,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:04:51,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238487601] [2020-10-27 19:04:51,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:04:51,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:04:51,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:04:51,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:04:51,914 INFO L87 Difference]: Start difference. First operand 4137 states and 5089 transitions. Second operand 5 states. [2020-10-27 19:05:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:05:01,758 INFO L93 Difference]: Finished difference Result 8288 states and 10200 transitions. [2020-10-27 19:05:01,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:05:01,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-10-27 19:05:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:05:01,789 INFO L225 Difference]: With dead ends: 8288 [2020-10-27 19:05:01,789 INFO L226 Difference]: Without dead ends: 4141 [2020-10-27 19:05:01,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:05:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2020-10-27 19:05:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 4137. [2020-10-27 19:05:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4137 states. [2020-10-27 19:05:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4137 states to 4137 states and 5086 transitions. [2020-10-27 19:05:01,925 INFO L78 Accepts]: Start accepts. Automaton has 4137 states and 5086 transitions. Word has length 214 [2020-10-27 19:05:01,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:05:01,926 INFO L481 AbstractCegarLoop]: Abstraction has 4137 states and 5086 transitions. [2020-10-27 19:05:01,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:05:01,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4137 states and 5086 transitions. [2020-10-27 19:05:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-27 19:05:01,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:05:01,930 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:05:01,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:05:01,930 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:05:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:05:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1988652158, now seen corresponding path program 1 times [2020-10-27 19:05:01,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:05:01,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710084721] [2020-10-27 19:05:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:05:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:02,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:02,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:02,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-27 19:05:02,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:02,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-27 19:05:02,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:05:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 19:05:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 19:05:02,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:02,755 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:05:02,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:05:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:02,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:02,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:02,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:05:02,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:02,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:05:02,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:02,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:05:02,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:05:02,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:05:02,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:02,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:05:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:02,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:02,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:05:02,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:02,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 19:05:02,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:02,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:05:02,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:05:02,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 19:05:02,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:02,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:05:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:03,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:03,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:03,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:05:03,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:03,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-27 19:05:03,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:03,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:05:03,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:05:03,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 19:05:03,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:05:03,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710084721] [2020-10-27 19:05:03,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:05:03,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:05:03,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574779807] [2020-10-27 19:05:03,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:05:03,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:05:03,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:05:03,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:05:03,284 INFO L87 Difference]: Start difference. First operand 4137 states and 5086 transitions. Second operand 8 states. [2020-10-27 19:05:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:05:17,745 INFO L93 Difference]: Finished difference Result 10937 states and 13528 transitions. [2020-10-27 19:05:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:05:17,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 218 [2020-10-27 19:05:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:05:17,785 INFO L225 Difference]: With dead ends: 10937 [2020-10-27 19:05:17,785 INFO L226 Difference]: Without dead ends: 6806 [2020-10-27 19:05:17,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:05:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6806 states. [2020-10-27 19:05:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6806 to 6365. [2020-10-27 19:05:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6365 states. [2020-10-27 19:05:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6365 states to 6365 states and 7642 transitions. [2020-10-27 19:05:17,969 INFO L78 Accepts]: Start accepts. Automaton has 6365 states and 7642 transitions. Word has length 218 [2020-10-27 19:05:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:05:17,970 INFO L481 AbstractCegarLoop]: Abstraction has 6365 states and 7642 transitions. [2020-10-27 19:05:17,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:05:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6365 states and 7642 transitions. [2020-10-27 19:05:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 19:05:17,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:05:17,974 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:05:17,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:05:17,974 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:05:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:05:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1045454976, now seen corresponding path program 1 times [2020-10-27 19:05:17,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:05:17,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494233344] [2020-10-27 19:05:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:05:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:18,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:19,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:19,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-27 19:05:19,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:05:19,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1193 [2020-10-27 19:05:19,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:19,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:05:19,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-27 19:05:19,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:05:19,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:19,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:05:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:19,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:19,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:19,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:05:19,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:19,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:05:19,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:19,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:05:19,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:05:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:05:19,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:05:19,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:05:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:19,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:19,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:05:19,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:19,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 19:05:19,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:19,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:05:19,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:05:19,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:05:19,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:19,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:05:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:19,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:19,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:19,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 19:05:19,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:19,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-27 19:05:19,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:19,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:05:19,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:05:19,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 19:05:19,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-27 19:05:19,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494233344] [2020-10-27 19:05:19,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:05:19,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:05:19,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992468767] [2020-10-27 19:05:19,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:05:19,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:05:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:05:19,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:05:19,827 INFO L87 Difference]: Start difference. First operand 6365 states and 7642 transitions. Second operand 5 states. [2020-10-27 19:05:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:05:33,065 INFO L93 Difference]: Finished difference Result 12728 states and 15311 transitions. [2020-10-27 19:05:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:05:33,074 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-10-27 19:05:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:05:33,114 INFO L225 Difference]: With dead ends: 12728 [2020-10-27 19:05:33,114 INFO L226 Difference]: Without dead ends: 6369 [2020-10-27 19:05:33,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 19:05:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2020-10-27 19:05:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 5930. [2020-10-27 19:05:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5930 states. [2020-10-27 19:05:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5930 states to 5930 states and 6893 transitions. [2020-10-27 19:05:33,289 INFO L78 Accepts]: Start accepts. Automaton has 5930 states and 6893 transitions. Word has length 225 [2020-10-27 19:05:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:05:33,290 INFO L481 AbstractCegarLoop]: Abstraction has 5930 states and 6893 transitions. [2020-10-27 19:05:33,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:05:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 5930 states and 6893 transitions. [2020-10-27 19:05:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-27 19:05:33,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:05:33,297 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:05:33,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:05:33,298 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:05:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:05:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash -345934952, now seen corresponding path program 1 times [2020-10-27 19:05:33,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:05:33,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888117511] [2020-10-27 19:05:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:05:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:33,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:33,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:34,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:35,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:37,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:38,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:38,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-27 19:05:38,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:05:38,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4926 [2020-10-27 19:05:38,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:38,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:05:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 264 [2020-10-27 19:05:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:05:38,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:38,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:05:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:38,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:38,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:05:38,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:38,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 19:05:38,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:38,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:05:38,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:05:38,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:05:38,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:38,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:05:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:38,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:38,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:38,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:05:38,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:38,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 19:05:38,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:05:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:05:38,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:05:38,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:38,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:05:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:38,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:38,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:38,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 19:05:38,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:38,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 19:05:38,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:05:38,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:05:38,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:05:38,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:38,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 19:05:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:38,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:38,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:05:38,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 19:05:38,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:05:38,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-27 19:05:38,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:05:38,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:05:38,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:05:38,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 19:05:38,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:05:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-27 19:05:39,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888117511] [2020-10-27 19:05:39,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:05:39,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:05:39,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305641843] [2020-10-27 19:05:39,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:05:39,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:05:39,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:05:39,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:05:39,061 INFO L87 Difference]: Start difference. First operand 5930 states and 6893 transitions. Second operand 5 states. [2020-10-27 19:05:54,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:05:54,875 INFO L93 Difference]: Finished difference Result 16276 states and 19392 transitions. [2020-10-27 19:05:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:05:54,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 302 [2020-10-27 19:05:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:05:54,919 INFO L225 Difference]: With dead ends: 16276 [2020-10-27 19:05:54,919 INFO L226 Difference]: Without dead ends: 9904 [2020-10-27 19:05:54,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 19:05:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9904 states. [2020-10-27 19:05:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9904 to 9886. [2020-10-27 19:05:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9886 states. [2020-10-27 19:05:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9886 states to 9886 states and 11482 transitions. [2020-10-27 19:05:55,165 INFO L78 Accepts]: Start accepts. Automaton has 9886 states and 11482 transitions. Word has length 302 [2020-10-27 19:05:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:05:55,166 INFO L481 AbstractCegarLoop]: Abstraction has 9886 states and 11482 transitions. [2020-10-27 19:05:55,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:05:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 9886 states and 11482 transitions. [2020-10-27 19:05:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-27 19:05:55,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:05:55,174 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:05:55,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:05:55,175 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:05:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:05:55,175 INFO L82 PathProgramCache]: Analyzing trace with hash 785464772, now seen corresponding path program 1 times [2020-10-27 19:05:55,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:05:55,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649046689] [2020-10-27 19:05:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:05:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:05:55,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:55,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:05:56,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:00,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:00,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-27 19:06:00,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:06:00,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-27 19:06:00,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:00,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:06:00,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 272 [2020-10-27 19:06:00,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:06:00,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:00,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:06:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:00,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:00,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:00,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:06:00,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:00,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:06:00,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:00,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:06:00,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:00,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:06:00,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:00,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:06:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:00,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:00,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:00,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:06:00,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:00,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 19:06:00,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:06:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:06:00,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:00,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:06:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:00,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:00,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:00,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 19:06:00,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:00,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 19:06:00,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:06:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:06:00,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:00,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-10-27 19:06:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:00,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:00,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 19:06:00,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:00,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 19:06:00,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:06:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 19:06:00,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-27 19:06:00,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649046689] [2020-10-27 19:06:00,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:06:00,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:06:00,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636348069] [2020-10-27 19:06:00,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:06:00,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:06:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:06:00,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:06:00,948 INFO L87 Difference]: Start difference. First operand 9886 states and 11482 transitions. Second operand 5 states. [2020-10-27 19:06:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:06:15,208 INFO L93 Difference]: Finished difference Result 24648 states and 29104 transitions. [2020-10-27 19:06:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:06:15,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2020-10-27 19:06:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:06:15,253 INFO L225 Difference]: With dead ends: 24648 [2020-10-27 19:06:15,253 INFO L226 Difference]: Without dead ends: 14768 [2020-10-27 19:06:15,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 19:06:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14768 states. [2020-10-27 19:06:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14768 to 13862. [2020-10-27 19:06:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13862 states. [2020-10-27 19:06:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13862 states to 13862 states and 16371 transitions. [2020-10-27 19:06:15,576 INFO L78 Accepts]: Start accepts. Automaton has 13862 states and 16371 transitions. Word has length 310 [2020-10-27 19:06:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:06:15,576 INFO L481 AbstractCegarLoop]: Abstraction has 13862 states and 16371 transitions. [2020-10-27 19:06:15,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:06:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 13862 states and 16371 transitions. [2020-10-27 19:06:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-27 19:06:15,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:06:15,587 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:15,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:06:15,587 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:06:15,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:06:15,588 INFO L82 PathProgramCache]: Analyzing trace with hash -860837296, now seen corresponding path program 1 times [2020-10-27 19:06:15,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:06:15,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413528707] [2020-10-27 19:06:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:06:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:15,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:16,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:17,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:20,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:20,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 363 [2020-10-27 19:06:20,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:06:20,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 19:06:20,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:20,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:06:20,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 309 [2020-10-27 19:06:20,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:06:20,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:20,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:06:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:20,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:20,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:20,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:06:20,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:20,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:06:20,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:20,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:06:20,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:20,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:06:20,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:20,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:06:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:20,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:20,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:20,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:06:20,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:20,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 19:06:20,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:20,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:06:20,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:20,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:06:20,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:20,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:06:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:21,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:21,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:21,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-27 19:06:21,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:21,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 19:06:21,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:06:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-27 19:06:21,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 19:06:21,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413528707] [2020-10-27 19:06:21,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:06:21,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:06:21,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679282069] [2020-10-27 19:06:21,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:06:21,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:06:21,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:06:21,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:06:21,349 INFO L87 Difference]: Start difference. First operand 13862 states and 16371 transitions. Second operand 5 states. [2020-10-27 19:06:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:06:36,716 INFO L93 Difference]: Finished difference Result 33043 states and 39423 transitions. [2020-10-27 19:06:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:06:36,720 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 349 [2020-10-27 19:06:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:06:36,804 INFO L225 Difference]: With dead ends: 33043 [2020-10-27 19:06:36,804 INFO L226 Difference]: Without dead ends: 19187 [2020-10-27 19:06:36,837 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 19:06:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19187 states. [2020-10-27 19:06:37,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19187 to 18277. [2020-10-27 19:06:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18277 states. [2020-10-27 19:06:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18277 states to 18277 states and 21976 transitions. [2020-10-27 19:06:37,248 INFO L78 Accepts]: Start accepts. Automaton has 18277 states and 21976 transitions. Word has length 349 [2020-10-27 19:06:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:06:37,249 INFO L481 AbstractCegarLoop]: Abstraction has 18277 states and 21976 transitions. [2020-10-27 19:06:37,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:06:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 18277 states and 21976 transitions. [2020-10-27 19:06:37,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-27 19:06:37,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:06:37,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 19:06:37,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:06:37,263 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:06:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:06:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash 930736260, now seen corresponding path program 1 times [2020-10-27 19:06:37,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:06:37,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597516238] [2020-10-27 19:06:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:06:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:37,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:37,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:40,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:42,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:42,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 392 [2020-10-27 19:06:42,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:06:42,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4895 [2020-10-27 19:06:42,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:42,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:06:42,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 338 [2020-10-27 19:06:42,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:06:42,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:42,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:06:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:42,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:42,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:42,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:06:42,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:42,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:06:42,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:42,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:06:42,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:42,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:06:42,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:42,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:06:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:42,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:42,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:42,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:06:42,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:42,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 19:06:42,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:42,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:06:42,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:42,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:06:42,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:42,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 19:06:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:42,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:42,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:42,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 19:06:42,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:42,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 19:06:42,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:06:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:06:42,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:42,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 19:06:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:06:42,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:06:42,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:06:42,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 19:06:42,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:06:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 19:06:42,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:06:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:06:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:06:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-27 19:06:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:06:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-10-27 19:06:42,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597516238] [2020-10-27 19:06:42,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:06:42,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:06:42,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746148463] [2020-10-27 19:06:42,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:06:42,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:06:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:06:42,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:06:42,944 INFO L87 Difference]: Start difference. First operand 18277 states and 21976 transitions. Second operand 5 states. [2020-10-27 19:07:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:07:00,580 INFO L93 Difference]: Finished difference Result 41844 states and 51141 transitions. [2020-10-27 19:07:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:07:00,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 376 [2020-10-27 19:07:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:07:00,670 INFO L225 Difference]: With dead ends: 41844 [2020-10-27 19:07:00,670 INFO L226 Difference]: Without dead ends: 22688 [2020-10-27 19:07:00,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 19:07:00,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22688 states. [2020-10-27 19:07:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22688 to 22234. [2020-10-27 19:07:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22234 states. [2020-10-27 19:07:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22234 states to 22234 states and 26821 transitions. [2020-10-27 19:07:01,164 INFO L78 Accepts]: Start accepts. Automaton has 22234 states and 26821 transitions. Word has length 376 [2020-10-27 19:07:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:07:01,165 INFO L481 AbstractCegarLoop]: Abstraction has 22234 states and 26821 transitions. [2020-10-27 19:07:01,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:07:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 22234 states and 26821 transitions. [2020-10-27 19:07:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-10-27 19:07:01,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:07:01,188 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 19:07:01,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:07:01,188 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:07:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:07:01,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1362048437, now seen corresponding path program 1 times [2020-10-27 19:07:01,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:07:01,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662591377] [2020-10-27 19:07:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY