/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:32:31,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:32:31,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:32:31,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:32:31,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:32:31,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:32:31,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:32:31,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:32:31,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:32:31,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:32:31,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:32:31,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:32:31,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:32:31,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:32:31,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:32:31,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:32:31,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:32:31,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:32:31,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:32:31,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:32:31,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:32:31,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:32:31,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:32:31,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:32:31,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:32:31,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:32:31,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:32:31,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:32:31,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:32:31,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:32:31,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:32:31,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:32:31,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:32:31,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:32:31,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:32:31,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:32:31,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:32:31,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:32:31,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:32:31,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:32:31,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:32:31,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:32:31,763 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:32:31,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:32:31,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:32:31,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:32:31,768 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:32:31,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:32:31,768 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:32:31,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:32:31,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:32:31,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:32:31,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:32:31,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:32:31,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:32:31,771 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:32:31,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:32:31,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:32:31,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:32:31,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:32:31,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:32:31,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:32:31,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:32:31,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:32:31,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:32:31,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:32:31,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:32:31,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:32:31,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:32:31,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:32:31,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:32:31,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:32:32,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:32:32,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:32:32,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:32:32,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:32:32,218 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:32:32,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-10-29 09:32:32,281 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe82fd6fc/451b02ad3c9e4d1e82fef65d70d7ca39/FLAGfd6e60502 [2020-10-29 09:32:32,948 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:32:32,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-10-29 09:32:32,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe82fd6fc/451b02ad3c9e4d1e82fef65d70d7ca39/FLAGfd6e60502 [2020-10-29 09:32:33,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe82fd6fc/451b02ad3c9e4d1e82fef65d70d7ca39 [2020-10-29 09:32:33,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:32:33,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:32:33,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:32:33,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:32:33,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:32:33,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:32:33" (1/1) ... [2020-10-29 09:32:33,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26afcda6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33, skipping insertion in model container [2020-10-29 09:32:33,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:32:33" (1/1) ... [2020-10-29 09:32:33,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:32:33,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:32:33,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:32:33,577 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:32:33,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:32:33,623 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:32:33,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33 WrapperNode [2020-10-29 09:32:33,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:32:33,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:32:33,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:32:33,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:32:33,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33" (1/1) ... [2020-10-29 09:32:33,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33" (1/1) ... [2020-10-29 09:32:33,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33" (1/1) ... [2020-10-29 09:32:33,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33" (1/1) ... [2020-10-29 09:32:33,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33" (1/1) ... [2020-10-29 09:32:33,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33" (1/1) ... [2020-10-29 09:32:33,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33" (1/1) ... [2020-10-29 09:32:33,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:32:33,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:32:33,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:32:33,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:32:33,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:32:33,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:32:33,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:32:33,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:32:33,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:32:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:32:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:32:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:32:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:32:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:32:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:32:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:32:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:32:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:32:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:32:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:32:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:32:34,234 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:32:34,234 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:32:34,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:32:34 BoogieIcfgContainer [2020-10-29 09:32:34,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:32:34,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:32:34,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:32:34,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:32:34,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:32:33" (1/3) ... [2020-10-29 09:32:34,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659bdc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:32:34, skipping insertion in model container [2020-10-29 09:32:34,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:32:33" (2/3) ... [2020-10-29 09:32:34,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659bdc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:32:34, skipping insertion in model container [2020-10-29 09:32:34,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:32:34" (3/3) ... [2020-10-29 09:32:34,248 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-10-29 09:32:34,261 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:32:34,266 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:32:34,280 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:32:34,311 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:32:34,311 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:32:34,311 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:32:34,311 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:32:34,312 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:32:34,312 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:32:34,312 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:32:34,312 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:32:34,330 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-10-29 09:32:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:32:34,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:34,338 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] [2020-10-29 09:32:34,338 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:34,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2059309882, now seen corresponding path program 1 times [2020-10-29 09:32:34,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:34,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37602228] [2020-10-29 09:32:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:34,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:34,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:34,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:32:34,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:34,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-29 09:32:34,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:34,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:34,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:32:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:34,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:32:35,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:35,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:35,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:35,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:35,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:35,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:32:35,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:35,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:35,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:35,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37602228] [2020-10-29 09:32:35,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:35,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:35,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473669313] [2020-10-29 09:32:35,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:35,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:35,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:35,077 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 4 states. [2020-10-29 09:32:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:35,366 INFO L93 Difference]: Finished difference Result 98 states and 169 transitions. [2020-10-29 09:32:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:35,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-29 09:32:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:35,380 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:32:35,380 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:32:35,383 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 [2020-10-29 09:32:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:32:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2020-10-29 09:32:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 09:32:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 99 transitions. [2020-10-29 09:32:35,432 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 99 transitions. Word has length 23 [2020-10-29 09:32:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:35,433 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 99 transitions. [2020-10-29 09:32:35,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 99 transitions. [2020-10-29 09:32:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:32:35,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:35,435 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] [2020-10-29 09:32:35,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:32:35,435 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:35,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:35,436 INFO L82 PathProgramCache]: Analyzing trace with hash 955793736, now seen corresponding path program 1 times [2020-10-29 09:32:35,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:35,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779248403] [2020-10-29 09:32:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:35,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:35,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:35,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:32:35,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:35,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 09:32:35,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:35,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:35,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:35,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:32:35,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:35,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:32:35,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:35,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:35,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:35,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:35,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:35,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:32:35,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:35,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:35,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:35,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:35,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:35,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:35,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779248403] [2020-10-29 09:32:35,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:35,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:35,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024896576] [2020-10-29 09:32:35,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:35,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:35,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:35,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:35,656 INFO L87 Difference]: Start difference. First operand 56 states and 99 transitions. Second operand 4 states. [2020-10-29 09:32:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:35,856 INFO L93 Difference]: Finished difference Result 129 states and 235 transitions. [2020-10-29 09:32:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:35,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-29 09:32:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:35,859 INFO L225 Difference]: With dead ends: 129 [2020-10-29 09:32:35,859 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:32:35,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:35,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:32:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-29 09:32:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 09:32:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 139 transitions. [2020-10-29 09:32:35,888 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 139 transitions. Word has length 23 [2020-10-29 09:32:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:35,888 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 139 transitions. [2020-10-29 09:32:35,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:35,889 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 139 transitions. [2020-10-29 09:32:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:32:35,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:35,890 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] [2020-10-29 09:32:35,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:32:35,890 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash 592501448, now seen corresponding path program 1 times [2020-10-29 09:32:35,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:35,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424822242] [2020-10-29 09:32:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:35,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:35,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:36,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:36,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:32:36,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:36,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-29 09:32:36,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:36,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:32:36,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:36,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:32:36,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:36,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:36,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:36,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:36,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:36,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:32:36,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:36,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:36,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:36,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:36,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:36,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:36,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424822242] [2020-10-29 09:32:36,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:36,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:36,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28070668] [2020-10-29 09:32:36,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:36,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:36,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:36,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:36,204 INFO L87 Difference]: Start difference. First operand 78 states and 139 transitions. Second operand 4 states. [2020-10-29 09:32:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:36,387 INFO L93 Difference]: Finished difference Result 119 states and 210 transitions. [2020-10-29 09:32:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:36,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 09:32:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:36,389 INFO L225 Difference]: With dead ends: 119 [2020-10-29 09:32:36,389 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:32:36,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:32:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-29 09:32:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:32:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 141 transitions. [2020-10-29 09:32:36,401 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 141 transitions. Word has length 24 [2020-10-29 09:32:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:36,402 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 141 transitions. [2020-10-29 09:32:36,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-10-29 09:32:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:32:36,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:36,403 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] [2020-10-29 09:32:36,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:32:36,403 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:36,404 INFO L82 PathProgramCache]: Analyzing trace with hash -428566906, now seen corresponding path program 1 times [2020-10-29 09:32:36,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:36,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826955368] [2020-10-29 09:32:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:36,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:36,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:32:36,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:36,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-29 09:32:36,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:36,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:36,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:36,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:32:36,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:36,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:36,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:36,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:36,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:36,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:36,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:36,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:32:36,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:36,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:36,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:36,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:36,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826955368] [2020-10-29 09:32:36,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:36,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:36,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374963520] [2020-10-29 09:32:36,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:36,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:36,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:36,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:36,539 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 4 states. [2020-10-29 09:32:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:36,723 INFO L93 Difference]: Finished difference Result 221 states and 398 transitions. [2020-10-29 09:32:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:36,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 09:32:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:36,726 INFO L225 Difference]: With dead ends: 221 [2020-10-29 09:32:36,726 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 09:32:36,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 09:32:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-29 09:32:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-29 09:32:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 262 transitions. [2020-10-29 09:32:36,741 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 262 transitions. Word has length 24 [2020-10-29 09:32:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:36,741 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 262 transitions. [2020-10-29 09:32:36,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 262 transitions. [2020-10-29 09:32:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:32:36,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:36,743 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] [2020-10-29 09:32:36,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:32:36,743 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:36,744 INFO L82 PathProgramCache]: Analyzing trace with hash 851296772, now seen corresponding path program 1 times [2020-10-29 09:32:36,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:36,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517486340] [2020-10-29 09:32:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:36,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:36,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:36,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:32:36,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:36,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-29 09:32:36,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:36,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:36,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:36,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:32:36,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:36,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:36,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:36,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:36,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:36,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:36,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:36,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:32:36,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:36,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:36,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:36,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:36,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:36,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:36,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517486340] [2020-10-29 09:32:36,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:36,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:36,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901928135] [2020-10-29 09:32:36,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:36,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:36,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:36,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:36,879 INFO L87 Difference]: Start difference. First operand 148 states and 262 transitions. Second operand 4 states. [2020-10-29 09:32:37,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:37,033 INFO L93 Difference]: Finished difference Result 192 states and 341 transitions. [2020-10-29 09:32:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:37,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 09:32:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:37,035 INFO L225 Difference]: With dead ends: 192 [2020-10-29 09:32:37,036 INFO L226 Difference]: Without dead ends: 189 [2020-10-29 09:32:37,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-29 09:32:37,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2020-10-29 09:32:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-29 09:32:37,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 260 transitions. [2020-10-29 09:32:37,048 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 260 transitions. Word has length 24 [2020-10-29 09:32:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:37,049 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 260 transitions. [2020-10-29 09:32:37,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:37,049 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 260 transitions. [2020-10-29 09:32:37,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:32:37,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:37,050 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] [2020-10-29 09:32:37,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:32:37,051 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:37,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:37,051 INFO L82 PathProgramCache]: Analyzing trace with hash -394063277, now seen corresponding path program 1 times [2020-10-29 09:32:37,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:37,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434046464] [2020-10-29 09:32:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:37,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:37,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:37,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:32:37,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:37,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-29 09:32:37,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:37,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:37,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:32:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:37,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:37,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:37,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:37,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:37,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:37,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:37,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:32:37,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:37,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:37,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:37,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434046464] [2020-10-29 09:32:37,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:37,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:37,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853522417] [2020-10-29 09:32:37,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:37,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:37,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:37,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:37,196 INFO L87 Difference]: Start difference. First operand 148 states and 260 transitions. Second operand 4 states. [2020-10-29 09:32:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:37,370 INFO L93 Difference]: Finished difference Result 276 states and 493 transitions. [2020-10-29 09:32:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:37,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-29 09:32:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:37,373 INFO L225 Difference]: With dead ends: 276 [2020-10-29 09:32:37,373 INFO L226 Difference]: Without dead ends: 273 [2020-10-29 09:32:37,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-29 09:32:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 200. [2020-10-29 09:32:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-29 09:32:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 350 transitions. [2020-10-29 09:32:37,386 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 350 transitions. Word has length 25 [2020-10-29 09:32:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:37,386 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 350 transitions. [2020-10-29 09:32:37,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 350 transitions. [2020-10-29 09:32:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:32:37,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:37,388 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] [2020-10-29 09:32:37,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:32:37,389 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:37,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1673926955, now seen corresponding path program 1 times [2020-10-29 09:32:37,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:37,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470425276] [2020-10-29 09:32:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:37,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:37,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:37,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:32:37,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:37,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-29 09:32:37,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:37,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:37,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:37,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:32:37,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:37,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:37,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:37,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:37,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:37,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:37,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:37,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:37,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:37,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:37,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:37,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:37,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:37,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:37,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470425276] [2020-10-29 09:32:37,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:37,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:37,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023842719] [2020-10-29 09:32:37,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:37,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:37,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:37,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:37,515 INFO L87 Difference]: Start difference. First operand 200 states and 350 transitions. Second operand 4 states. [2020-10-29 09:32:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:37,671 INFO L93 Difference]: Finished difference Result 472 states and 837 transitions. [2020-10-29 09:32:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:37,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-29 09:32:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:37,674 INFO L225 Difference]: With dead ends: 472 [2020-10-29 09:32:37,674 INFO L226 Difference]: Without dead ends: 281 [2020-10-29 09:32:37,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-29 09:32:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2020-10-29 09:32:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-29 09:32:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 488 transitions. [2020-10-29 09:32:37,689 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 488 transitions. Word has length 25 [2020-10-29 09:32:37,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:37,690 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 488 transitions. [2020-10-29 09:32:37,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 488 transitions. [2020-10-29 09:32:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:32:37,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:37,692 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] [2020-10-29 09:32:37,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:32:37,692 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash 675559793, now seen corresponding path program 1 times [2020-10-29 09:32:37,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:37,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917352738] [2020-10-29 09:32:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:37,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:37,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:37,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:37,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:32:37,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:37,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-29 09:32:37,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:37,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:37,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:37,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:32:37,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:37,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:37,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:37,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:37,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:37,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:37,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:37,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:37,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:37,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:37,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:37,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:37,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:37,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:37,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917352738] [2020-10-29 09:32:37,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:37,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:37,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753902623] [2020-10-29 09:32:37,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:37,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:37,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:37,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:37,856 INFO L87 Difference]: Start difference. First operand 280 states and 488 transitions. Second operand 4 states. [2020-10-29 09:32:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:38,069 INFO L93 Difference]: Finished difference Result 520 states and 919 transitions. [2020-10-29 09:32:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:38,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-29 09:32:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:38,073 INFO L225 Difference]: With dead ends: 520 [2020-10-29 09:32:38,073 INFO L226 Difference]: Without dead ends: 517 [2020-10-29 09:32:38,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-29 09:32:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 388. [2020-10-29 09:32:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-29 09:32:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 668 transitions. [2020-10-29 09:32:38,091 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 668 transitions. Word has length 26 [2020-10-29 09:32:38,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:38,091 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 668 transitions. [2020-10-29 09:32:38,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:38,091 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 668 transitions. [2020-10-29 09:32:38,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:32:38,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:38,094 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] [2020-10-29 09:32:38,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:32:38,094 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:38,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:38,095 INFO L82 PathProgramCache]: Analyzing trace with hash -604303885, now seen corresponding path program 1 times [2020-10-29 09:32:38,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:38,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427305249] [2020-10-29 09:32:38,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:38,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:38,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:38,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:38,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:32:38,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:38,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-29 09:32:38,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:38,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:38,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:38,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:32:38,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:38,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:38,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:38,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:38,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:38,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:38,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:38,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:38,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:38,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:38,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:38,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427305249] [2020-10-29 09:32:38,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:38,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:38,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104212498] [2020-10-29 09:32:38,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:38,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:38,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:38,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:38,280 INFO L87 Difference]: Start difference. First operand 388 states and 668 transitions. Second operand 4 states. [2020-10-29 09:32:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:38,483 INFO L93 Difference]: Finished difference Result 920 states and 1599 transitions. [2020-10-29 09:32:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:38,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-29 09:32:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:38,489 INFO L225 Difference]: With dead ends: 920 [2020-10-29 09:32:38,490 INFO L226 Difference]: Without dead ends: 541 [2020-10-29 09:32:38,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-10-29 09:32:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 540. [2020-10-29 09:32:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-10-29 09:32:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 924 transitions. [2020-10-29 09:32:38,516 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 924 transitions. Word has length 26 [2020-10-29 09:32:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:38,517 INFO L481 AbstractCegarLoop]: Abstraction has 540 states and 924 transitions. [2020-10-29 09:32:38,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 924 transitions. [2020-10-29 09:32:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:32:38,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:38,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:38,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:32:38,519 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash -525852834, now seen corresponding path program 1 times [2020-10-29 09:32:38,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:38,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505442542] [2020-10-29 09:32:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:38,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:38,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:38,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:38,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:38,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:32:38,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:38,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-29 09:32:38,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:38,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:38,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:38,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:32:38,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:38,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:38,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:38,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:38,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:38,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:38,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:38,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:38,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:38,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:38,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505442542] [2020-10-29 09:32:38,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:38,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:38,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829788333] [2020-10-29 09:32:38,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:38,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:38,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:38,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:38,859 INFO L87 Difference]: Start difference. First operand 540 states and 924 transitions. Second operand 4 states. [2020-10-29 09:32:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:39,045 INFO L93 Difference]: Finished difference Result 992 states and 1719 transitions. [2020-10-29 09:32:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:39,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-29 09:32:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:39,051 INFO L225 Difference]: With dead ends: 992 [2020-10-29 09:32:39,051 INFO L226 Difference]: Without dead ends: 989 [2020-10-29 09:32:39,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2020-10-29 09:32:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 764. [2020-10-29 09:32:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-10-29 09:32:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1284 transitions. [2020-10-29 09:32:39,081 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1284 transitions. Word has length 27 [2020-10-29 09:32:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:39,081 INFO L481 AbstractCegarLoop]: Abstraction has 764 states and 1284 transitions. [2020-10-29 09:32:39,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1284 transitions. [2020-10-29 09:32:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:32:39,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:39,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:32:39,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:32:39,083 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1805716512, now seen corresponding path program 1 times [2020-10-29 09:32:39,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:39,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972797969] [2020-10-29 09:32:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:39,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:39,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:39,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:39,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:32:39,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:39,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-29 09:32:39,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:39,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:39,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:39,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:32:39,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:39,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:39,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:39,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:39,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:39,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:39,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:39,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:32:39,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:39,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:39,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:39,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:39,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:39,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:39,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972797969] [2020-10-29 09:32:39,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:39,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:39,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936286723] [2020-10-29 09:32:39,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:39,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:39,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:39,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:39,354 INFO L87 Difference]: Start difference. First operand 764 states and 1284 transitions. Second operand 4 states. [2020-10-29 09:32:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:39,565 INFO L93 Difference]: Finished difference Result 1808 states and 3063 transitions. [2020-10-29 09:32:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:39,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-29 09:32:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:39,570 INFO L225 Difference]: With dead ends: 1808 [2020-10-29 09:32:39,571 INFO L226 Difference]: Without dead ends: 1053 [2020-10-29 09:32:39,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2020-10-29 09:32:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1052. [2020-10-29 09:32:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2020-10-29 09:32:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1756 transitions. [2020-10-29 09:32:39,610 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1756 transitions. Word has length 27 [2020-10-29 09:32:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:39,611 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1756 transitions. [2020-10-29 09:32:39,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:39,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1756 transitions. [2020-10-29 09:32:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:32:39,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:39,613 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] [2020-10-29 09:32:39,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:32:39,613 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:39,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:39,614 INFO L82 PathProgramCache]: Analyzing trace with hash 885071964, now seen corresponding path program 1 times [2020-10-29 09:32:39,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:39,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735619743] [2020-10-29 09:32:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:39,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:39,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:39,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:39,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:39,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:39,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:32:39,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:32:39,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-29 09:32:39,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:39,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:39,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:32:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:39,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:39,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:39,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:39,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:39,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:39,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:39,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:39,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:39,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:39,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:39,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:39,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:39,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:39,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735619743] [2020-10-29 09:32:39,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:39,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:39,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43842357] [2020-10-29 09:32:39,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:39,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:39,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:39,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:39,948 INFO L87 Difference]: Start difference. First operand 1052 states and 1756 transitions. Second operand 4 states. [2020-10-29 09:32:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:40,142 INFO L93 Difference]: Finished difference Result 1598 states and 2667 transitions. [2020-10-29 09:32:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:40,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:32:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:40,148 INFO L225 Difference]: With dead ends: 1598 [2020-10-29 09:32:40,148 INFO L226 Difference]: Without dead ends: 1083 [2020-10-29 09:32:40,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2020-10-29 09:32:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1082. [2020-10-29 09:32:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1082 states. [2020-10-29 09:32:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1784 transitions. [2020-10-29 09:32:40,188 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1784 transitions. Word has length 28 [2020-10-29 09:32:40,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:40,188 INFO L481 AbstractCegarLoop]: Abstraction has 1082 states and 1784 transitions. [2020-10-29 09:32:40,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:40,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1784 transitions. [2020-10-29 09:32:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:32:40,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:40,190 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] [2020-10-29 09:32:40,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:32:40,190 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:40,191 INFO L82 PathProgramCache]: Analyzing trace with hash -135996390, now seen corresponding path program 1 times [2020-10-29 09:32:40,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:40,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750501496] [2020-10-29 09:32:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:40,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:40,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:40,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:40,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:40,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:32:40,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:40,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-29 09:32:40,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:40,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:40,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:40,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:32:40,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:40,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:40,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:40,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:40,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:40,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:40,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:40,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:40,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:40,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:40,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:40,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:40,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750501496] [2020-10-29 09:32:40,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:40,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:40,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820744968] [2020-10-29 09:32:40,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:40,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:40,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:40,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:40,395 INFO L87 Difference]: Start difference. First operand 1082 states and 1784 transitions. Second operand 4 states. [2020-10-29 09:32:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:40,585 INFO L93 Difference]: Finished difference Result 1934 states and 3227 transitions. [2020-10-29 09:32:40,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:40,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:32:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:40,594 INFO L225 Difference]: With dead ends: 1934 [2020-10-29 09:32:40,595 INFO L226 Difference]: Without dead ends: 1931 [2020-10-29 09:32:40,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2020-10-29 09:32:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1546. [2020-10-29 09:32:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-10-29 09:32:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2488 transitions. [2020-10-29 09:32:40,670 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2488 transitions. Word has length 28 [2020-10-29 09:32:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:40,671 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2488 transitions. [2020-10-29 09:32:40,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2488 transitions. [2020-10-29 09:32:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:32:40,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:40,674 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] [2020-10-29 09:32:40,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:32:40,674 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:40,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1415860068, now seen corresponding path program 1 times [2020-10-29 09:32:40,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:40,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566589429] [2020-10-29 09:32:40,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:40,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:40,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:40,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:40,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:40,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:32:40,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:40,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-29 09:32:40,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:40,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:32:40,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:40,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:40,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:40,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:40,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:40,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:40,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:40,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:40,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:40,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:40,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:40,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:40,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:40,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:40,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566589429] [2020-10-29 09:32:40,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:40,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:40,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31656514] [2020-10-29 09:32:40,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:40,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:40,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:40,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:40,888 INFO L87 Difference]: Start difference. First operand 1546 states and 2488 transitions. Second operand 4 states. [2020-10-29 09:32:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:41,094 INFO L93 Difference]: Finished difference Result 3598 states and 5819 transitions. [2020-10-29 09:32:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:41,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:32:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:41,105 INFO L225 Difference]: With dead ends: 3598 [2020-10-29 09:32:41,105 INFO L226 Difference]: Without dead ends: 2091 [2020-10-29 09:32:41,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2020-10-29 09:32:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2090. [2020-10-29 09:32:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2020-10-29 09:32:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3336 transitions. [2020-10-29 09:32:41,186 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3336 transitions. Word has length 28 [2020-10-29 09:32:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:41,186 INFO L481 AbstractCegarLoop]: Abstraction has 2090 states and 3336 transitions. [2020-10-29 09:32:41,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3336 transitions. [2020-10-29 09:32:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:32:41,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:41,189 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] [2020-10-29 09:32:41,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:32:41,190 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash 85730411, now seen corresponding path program 1 times [2020-10-29 09:32:41,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:41,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070039942] [2020-10-29 09:32:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:41,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:41,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:41,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:41,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:41,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:41,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:32:41,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:32:41,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-29 09:32:41,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:41,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:41,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:41,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:32:41,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:41,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:41,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:41,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:41,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:41,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:41,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:41,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:41,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:41,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070039942] [2020-10-29 09:32:41,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:41,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:41,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221135945] [2020-10-29 09:32:41,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:41,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:41,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:41,556 INFO L87 Difference]: Start difference. First operand 2090 states and 3336 transitions. Second operand 4 states. [2020-10-29 09:32:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:41,752 INFO L93 Difference]: Finished difference Result 3102 states and 4923 transitions. [2020-10-29 09:32:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:41,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:32:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:41,763 INFO L225 Difference]: With dead ends: 3102 [2020-10-29 09:32:41,763 INFO L226 Difference]: Without dead ends: 2091 [2020-10-29 09:32:41,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2020-10-29 09:32:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2090. [2020-10-29 09:32:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2020-10-29 09:32:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3272 transitions. [2020-10-29 09:32:41,844 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3272 transitions. Word has length 29 [2020-10-29 09:32:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:41,844 INFO L481 AbstractCegarLoop]: Abstraction has 2090 states and 3272 transitions. [2020-10-29 09:32:41,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3272 transitions. [2020-10-29 09:32:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:32:41,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:41,847 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] [2020-10-29 09:32:41,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:32:41,848 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1603213331, now seen corresponding path program 1 times [2020-10-29 09:32:41,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:41,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989582006] [2020-10-29 09:32:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:41,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:41,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:42,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:42,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:32:42,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:42,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-29 09:32:42,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:42,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:42,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:42,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:32:42,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:42,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:42,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:42,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:42,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:42,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:42,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:42,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:42,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:42,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:42,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:42,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:42,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:42,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:42,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989582006] [2020-10-29 09:32:42,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:42,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:42,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259603180] [2020-10-29 09:32:42,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:42,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:42,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:42,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:42,065 INFO L87 Difference]: Start difference. First operand 2090 states and 3272 transitions. Second operand 4 states. [2020-10-29 09:32:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:42,287 INFO L93 Difference]: Finished difference Result 3694 states and 5867 transitions. [2020-10-29 09:32:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:42,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:32:42,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:42,305 INFO L225 Difference]: With dead ends: 3694 [2020-10-29 09:32:42,305 INFO L226 Difference]: Without dead ends: 3691 [2020-10-29 09:32:42,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3691 states. [2020-10-29 09:32:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3691 to 3050. [2020-10-29 09:32:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3050 states. [2020-10-29 09:32:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 4648 transitions. [2020-10-29 09:32:42,409 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 4648 transitions. Word has length 29 [2020-10-29 09:32:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:42,409 INFO L481 AbstractCegarLoop]: Abstraction has 3050 states and 4648 transitions. [2020-10-29 09:32:42,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 4648 transitions. [2020-10-29 09:32:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:32:42,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:42,414 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] [2020-10-29 09:32:42,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:32:42,414 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:42,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:42,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1411890287, now seen corresponding path program 1 times [2020-10-29 09:32:42,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:42,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640480405] [2020-10-29 09:32:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:42,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:42,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:42,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:42,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:42,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:32:42,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:42,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-29 09:32:42,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:42,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:42,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:42,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:32:42,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:42,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:42,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:42,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:42,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:42,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:42,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:42,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:32:42,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:42,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:42,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:42,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:42,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:42,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640480405] [2020-10-29 09:32:42,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:42,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:42,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468156107] [2020-10-29 09:32:42,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:42,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:42,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:42,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:42,641 INFO L87 Difference]: Start difference. First operand 3050 states and 4648 transitions. Second operand 4 states. [2020-10-29 09:32:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:42,882 INFO L93 Difference]: Finished difference Result 7086 states and 10859 transitions. [2020-10-29 09:32:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:42,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:32:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:42,901 INFO L225 Difference]: With dead ends: 7086 [2020-10-29 09:32:42,902 INFO L226 Difference]: Without dead ends: 4075 [2020-10-29 09:32:42,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-10-29 09:32:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4074. [2020-10-29 09:32:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4074 states. [2020-10-29 09:32:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6152 transitions. [2020-10-29 09:32:43,071 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6152 transitions. Word has length 29 [2020-10-29 09:32:43,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:43,072 INFO L481 AbstractCegarLoop]: Abstraction has 4074 states and 6152 transitions. [2020-10-29 09:32:43,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6152 transitions. [2020-10-29 09:32:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:32:43,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:43,077 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] [2020-10-29 09:32:43,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:32:43,077 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:43,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:43,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1846656067, now seen corresponding path program 1 times [2020-10-29 09:32:43,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:43,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716654329] [2020-10-29 09:32:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:43,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:43,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:43,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:43,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:43,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:43,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:32:43,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:32:43,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-29 09:32:43,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:43,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:32:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:43,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:43,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:43,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:43,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:43,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:43,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:43,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:43,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:43,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:43,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:43,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716654329] [2020-10-29 09:32:43,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:43,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:43,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108888955] [2020-10-29 09:32:43,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:43,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:43,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:43,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:43,476 INFO L87 Difference]: Start difference. First operand 4074 states and 6152 transitions. Second operand 4 states. [2020-10-29 09:32:43,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:43,729 INFO L93 Difference]: Finished difference Result 6062 states and 9099 transitions. [2020-10-29 09:32:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:43,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:32:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:43,759 INFO L225 Difference]: With dead ends: 6062 [2020-10-29 09:32:43,759 INFO L226 Difference]: Without dead ends: 4075 [2020-10-29 09:32:43,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-10-29 09:32:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4074. [2020-10-29 09:32:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4074 states. [2020-10-29 09:32:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6024 transitions. [2020-10-29 09:32:43,915 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6024 transitions. Word has length 30 [2020-10-29 09:32:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:43,915 INFO L481 AbstractCegarLoop]: Abstraction has 4074 states and 6024 transitions. [2020-10-29 09:32:43,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:43,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6024 transitions. [2020-10-29 09:32:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:32:43,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:43,923 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] [2020-10-29 09:32:43,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:32:43,923 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:43,923 INFO L82 PathProgramCache]: Analyzing trace with hash 157712325, now seen corresponding path program 1 times [2020-10-29 09:32:43,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:43,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877828897] [2020-10-29 09:32:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:43,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:43,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:43,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:44,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:44,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:32:44,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:44,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-29 09:32:44,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:44,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:44,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:44,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:32:44,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:44,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:44,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:44,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:44,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:44,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:44,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:44,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:44,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:44,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:44,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:44,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877828897] [2020-10-29 09:32:44,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:44,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:44,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715886367] [2020-10-29 09:32:44,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:44,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:44,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:44,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:44,134 INFO L87 Difference]: Start difference. First operand 4074 states and 6024 transitions. Second operand 4 states. [2020-10-29 09:32:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:44,421 INFO L93 Difference]: Finished difference Result 7086 states and 10635 transitions. [2020-10-29 09:32:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:44,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:32:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:44,441 INFO L225 Difference]: With dead ends: 7086 [2020-10-29 09:32:44,441 INFO L226 Difference]: Without dead ends: 7083 [2020-10-29 09:32:44,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2020-10-29 09:32:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 6058. [2020-10-29 09:32:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6058 states. [2020-10-29 09:32:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6058 states to 6058 states and 8712 transitions. [2020-10-29 09:32:44,625 INFO L78 Accepts]: Start accepts. Automaton has 6058 states and 8712 transitions. Word has length 30 [2020-10-29 09:32:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:44,625 INFO L481 AbstractCegarLoop]: Abstraction has 6058 states and 8712 transitions. [2020-10-29 09:32:44,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:44,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6058 states and 8712 transitions. [2020-10-29 09:32:44,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:32:44,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:44,635 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] [2020-10-29 09:32:44,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:32:44,636 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:44,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1122151353, now seen corresponding path program 1 times [2020-10-29 09:32:44,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:44,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77218263] [2020-10-29 09:32:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:44,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:44,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:44,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:44,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:44,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:32:44,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:44,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-29 09:32:44,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:44,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:44,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:32:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:44,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:44,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:44,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:44,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:44,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:44,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:44,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:44,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:44,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:44,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:44,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:44,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:44,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:44,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77218263] [2020-10-29 09:32:44,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:44,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:44,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833217508] [2020-10-29 09:32:44,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:44,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:44,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:44,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:44,845 INFO L87 Difference]: Start difference. First operand 6058 states and 8712 transitions. Second operand 4 states. [2020-10-29 09:32:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:45,165 INFO L93 Difference]: Finished difference Result 13998 states and 20235 transitions. [2020-10-29 09:32:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:45,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:32:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:45,183 INFO L225 Difference]: With dead ends: 13998 [2020-10-29 09:32:45,183 INFO L226 Difference]: Without dead ends: 7979 [2020-10-29 09:32:45,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2020-10-29 09:32:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 7978. [2020-10-29 09:32:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7978 states. [2020-10-29 09:32:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7978 states to 7978 states and 11336 transitions. [2020-10-29 09:32:45,545 INFO L78 Accepts]: Start accepts. Automaton has 7978 states and 11336 transitions. Word has length 30 [2020-10-29 09:32:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:45,545 INFO L481 AbstractCegarLoop]: Abstraction has 7978 states and 11336 transitions. [2020-10-29 09:32:45,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 7978 states and 11336 transitions. [2020-10-29 09:32:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:32:45,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:45,555 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] [2020-10-29 09:32:45,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:32:45,556 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:45,556 INFO L82 PathProgramCache]: Analyzing trace with hash 600787126, now seen corresponding path program 1 times [2020-10-29 09:32:45,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:45,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710750341] [2020-10-29 09:32:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:45,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:45,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:45,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:45,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:32:45,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:32:45,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-29 09:32:45,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:45,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:45,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:45,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:32:45,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:45,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:45,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:45,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:45,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:45,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:45,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:45,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:45,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:45,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:45,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:45,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:45,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:45,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:45,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710750341] [2020-10-29 09:32:45,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:45,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:45,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398242402] [2020-10-29 09:32:45,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:45,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:45,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:45,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:45,842 INFO L87 Difference]: Start difference. First operand 7978 states and 11336 transitions. Second operand 4 states. [2020-10-29 09:32:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:46,203 INFO L93 Difference]: Finished difference Result 12110 states and 17227 transitions. [2020-10-29 09:32:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:46,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-29 09:32:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:46,221 INFO L225 Difference]: With dead ends: 12110 [2020-10-29 09:32:46,221 INFO L226 Difference]: Without dead ends: 8203 [2020-10-29 09:32:46,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:46,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2020-10-29 09:32:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8202. [2020-10-29 09:32:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8202 states. [2020-10-29 09:32:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8202 states to 8202 states and 11528 transitions. [2020-10-29 09:32:46,572 INFO L78 Accepts]: Start accepts. Automaton has 8202 states and 11528 transitions. Word has length 31 [2020-10-29 09:32:46,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:46,572 INFO L481 AbstractCegarLoop]: Abstraction has 8202 states and 11528 transitions. [2020-10-29 09:32:46,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:46,572 INFO L276 IsEmpty]: Start isEmpty. Operand 8202 states and 11528 transitions. [2020-10-29 09:32:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:32:46,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:46,583 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] [2020-10-29 09:32:46,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:32:46,585 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:46,586 INFO L82 PathProgramCache]: Analyzing trace with hash -420281228, now seen corresponding path program 1 times [2020-10-29 09:32:46,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:46,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776249222] [2020-10-29 09:32:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:46,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:46,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:46,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:46,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:46,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:32:46,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:46,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-29 09:32:46,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:46,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:46,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:46,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:32:46,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:46,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:46,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:46,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:46,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:46,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:46,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:46,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:46,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:46,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:46,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:46,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:46,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776249222] [2020-10-29 09:32:46,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:46,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:46,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430808185] [2020-10-29 09:32:46,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:46,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:46,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:46,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:46,823 INFO L87 Difference]: Start difference. First operand 8202 states and 11528 transitions. Second operand 4 states. [2020-10-29 09:32:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:47,255 INFO L93 Difference]: Finished difference Result 13838 states and 19595 transitions. [2020-10-29 09:32:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:47,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-29 09:32:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:47,288 INFO L225 Difference]: With dead ends: 13838 [2020-10-29 09:32:47,288 INFO L226 Difference]: Without dead ends: 13835 [2020-10-29 09:32:47,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2020-10-29 09:32:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12298. [2020-10-29 09:32:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12298 states. [2020-10-29 09:32:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12298 states to 12298 states and 16776 transitions. [2020-10-29 09:32:47,691 INFO L78 Accepts]: Start accepts. Automaton has 12298 states and 16776 transitions. Word has length 31 [2020-10-29 09:32:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:47,691 INFO L481 AbstractCegarLoop]: Abstraction has 12298 states and 16776 transitions. [2020-10-29 09:32:47,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 12298 states and 16776 transitions. [2020-10-29 09:32:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:32:47,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:47,710 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] [2020-10-29 09:32:47,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:32:47,710 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:47,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:47,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1700144906, now seen corresponding path program 1 times [2020-10-29 09:32:47,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:47,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249136874] [2020-10-29 09:32:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:47,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:47,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:47,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:47,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:47,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:32:47,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:47,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-29 09:32:47,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:47,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:47,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:47,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:32:47,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:47,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:47,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:47,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:47,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:47,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:47,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:47,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:47,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:47,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:47,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:47,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:47,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:47,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:47,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249136874] [2020-10-29 09:32:47,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:47,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:47,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446108714] [2020-10-29 09:32:47,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:47,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:47,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:47,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:47,898 INFO L87 Difference]: Start difference. First operand 12298 states and 16776 transitions. Second operand 4 states. [2020-10-29 09:32:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:48,406 INFO L93 Difference]: Finished difference Result 27918 states and 38027 transitions. [2020-10-29 09:32:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:48,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-29 09:32:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:48,437 INFO L225 Difference]: With dead ends: 27918 [2020-10-29 09:32:48,438 INFO L226 Difference]: Without dead ends: 15883 [2020-10-29 09:32:48,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2020-10-29 09:32:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15882. [2020-10-29 09:32:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15882 states. [2020-10-29 09:32:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 21256 transitions. [2020-10-29 09:32:48,959 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 21256 transitions. Word has length 31 [2020-10-29 09:32:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:48,960 INFO L481 AbstractCegarLoop]: Abstraction has 15882 states and 21256 transitions. [2020-10-29 09:32:48,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 21256 transitions. [2020-10-29 09:32:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:32:48,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:48,978 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] [2020-10-29 09:32:48,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:32:48,978 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:48,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:48,979 INFO L82 PathProgramCache]: Analyzing trace with hash -137133262, now seen corresponding path program 1 times [2020-10-29 09:32:48,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:48,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075610597] [2020-10-29 09:32:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:48,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:48,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:49,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:49,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:49,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:32:49,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:32:49,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-29 09:32:49,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:49,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:32:49,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:49,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:49,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:49,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:49,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:49,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:49,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:49,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:49,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:49,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:49,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:49,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:49,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:49,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:49,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075610597] [2020-10-29 09:32:49,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:49,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:49,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047553331] [2020-10-29 09:32:49,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:49,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:49,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:49,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:49,330 INFO L87 Difference]: Start difference. First operand 15882 states and 21256 transitions. Second operand 4 states. [2020-10-29 09:32:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:49,991 INFO L93 Difference]: Finished difference Result 23822 states and 31755 transitions. [2020-10-29 09:32:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:49,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:32:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:50,037 INFO L225 Difference]: With dead ends: 23822 [2020-10-29 09:32:50,037 INFO L226 Difference]: Without dead ends: 16139 [2020-10-29 09:32:50,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2020-10-29 09:32:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16138. [2020-10-29 09:32:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-10-29 09:32:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 21256 transitions. [2020-10-29 09:32:50,811 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 21256 transitions. Word has length 32 [2020-10-29 09:32:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:50,811 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 21256 transitions. [2020-10-29 09:32:50,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 21256 transitions. [2020-10-29 09:32:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:32:50,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:50,833 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] [2020-10-29 09:32:50,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:32:50,835 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:50,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1158201616, now seen corresponding path program 1 times [2020-10-29 09:32:50,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:50,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5485171] [2020-10-29 09:32:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:50,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:50,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:50,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:50,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:50,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:32:50,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:32:50,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-29 09:32:50,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:50,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:50,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:50,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:32:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:50,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:51,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:51,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:51,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:51,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:51,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:51,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:51,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:51,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:51,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:51,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:51,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:51,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5485171] [2020-10-29 09:32:51,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:51,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:51,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620045110] [2020-10-29 09:32:51,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:51,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:51,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:51,021 INFO L87 Difference]: Start difference. First operand 16138 states and 21256 transitions. Second operand 4 states. [2020-10-29 09:32:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:51,514 INFO L93 Difference]: Finished difference Result 23822 states and 30987 transitions. [2020-10-29 09:32:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:51,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:32:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:51,550 INFO L225 Difference]: With dead ends: 23822 [2020-10-29 09:32:51,550 INFO L226 Difference]: Without dead ends: 16139 [2020-10-29 09:32:51,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2020-10-29 09:32:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16138. [2020-10-29 09:32:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-10-29 09:32:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 20744 transitions. [2020-10-29 09:32:52,248 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 20744 transitions. Word has length 32 [2020-10-29 09:32:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:52,249 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 20744 transitions. [2020-10-29 09:32:52,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 20744 transitions. [2020-10-29 09:32:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:32:52,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:52,265 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] [2020-10-29 09:32:52,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:32:52,265 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:52,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1447821938, now seen corresponding path program 1 times [2020-10-29 09:32:52,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:52,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743004115] [2020-10-29 09:32:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:52,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:52,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:52,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:52,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:32:52,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:32:52,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-29 09:32:52,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:52,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:32:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:52,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:52,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:52,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:52,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:52,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:52,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:52,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:52,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:52,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:52,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:52,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:52,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:52,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743004115] [2020-10-29 09:32:52,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:52,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:52,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115165510] [2020-10-29 09:32:52,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:52,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:52,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:52,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:52,382 INFO L87 Difference]: Start difference. First operand 16138 states and 20744 transitions. Second operand 4 states. [2020-10-29 09:32:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:52,804 INFO L93 Difference]: Finished difference Result 23822 states and 30219 transitions. [2020-10-29 09:32:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:52,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:32:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:52,856 INFO L225 Difference]: With dead ends: 23822 [2020-10-29 09:32:52,856 INFO L226 Difference]: Without dead ends: 16139 [2020-10-29 09:32:52,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2020-10-29 09:32:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16138. [2020-10-29 09:32:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-10-29 09:32:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 20232 transitions. [2020-10-29 09:32:53,328 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 20232 transitions. Word has length 32 [2020-10-29 09:32:53,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:53,328 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 20232 transitions. [2020-10-29 09:32:53,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 20232 transitions. [2020-10-29 09:32:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:32:53,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:53,348 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] [2020-10-29 09:32:53,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:32:53,348 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash -546322768, now seen corresponding path program 1 times [2020-10-29 09:32:53,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:53,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018715994] [2020-10-29 09:32:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:53,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:53,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:53,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:32:53,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:53,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 09:32:53,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:53,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 09:32:53,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:53,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:53,497 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-10-29 09:32:53,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:53,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:53,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:53,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:53,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:53,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:32:53,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:53,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:53,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:53,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018715994] [2020-10-29 09:32:53,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:53,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:53,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214790600] [2020-10-29 09:32:53,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:53,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:53,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:53,537 INFO L87 Difference]: Start difference. First operand 16138 states and 20232 transitions. Second operand 4 states. [2020-10-29 09:32:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:54,214 INFO L93 Difference]: Finished difference Result 46862 states and 57611 transitions. [2020-10-29 09:32:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:54,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:32:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:54,313 INFO L225 Difference]: With dead ends: 46862 [2020-10-29 09:32:54,313 INFO L226 Difference]: Without dead ends: 31243 [2020-10-29 09:32:54,342 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 [2020-10-29 09:32:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2020-10-29 09:32:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31242. [2020-10-29 09:32:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-10-29 09:32:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 37384 transitions. [2020-10-29 09:32:55,326 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 37384 transitions. Word has length 32 [2020-10-29 09:32:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:55,326 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 37384 transitions. [2020-10-29 09:32:55,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:55,326 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 37384 transitions. [2020-10-29 09:32:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:32:55,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:55,346 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] [2020-10-29 09:32:55,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:32:55,347 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:55,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:55,347 INFO L82 PathProgramCache]: Analyzing trace with hash 733540910, now seen corresponding path program 1 times [2020-10-29 09:32:55,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:55,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352507692] [2020-10-29 09:32:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:55,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:55,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:55,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:32:55,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:55,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 09:32:55,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:55,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:55,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:55,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 09:32:55,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:55,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:55,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:55,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:55,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:55,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:55,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:55,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:55,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:55,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:55,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:55,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:55,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:55,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352507692] [2020-10-29 09:32:55,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:55,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:55,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631481700] [2020-10-29 09:32:55,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:55,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:55,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:55,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:55,438 INFO L87 Difference]: Start difference. First operand 31242 states and 37384 transitions. Second operand 4 states. [2020-10-29 09:32:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:56,331 INFO L93 Difference]: Finished difference Result 33294 states and 40459 transitions. [2020-10-29 09:32:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:56,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:32:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:56,386 INFO L225 Difference]: With dead ends: 33294 [2020-10-29 09:32:56,386 INFO L226 Difference]: Without dead ends: 33291 [2020-10-29 09:32:56,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:32:56,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33291 states. [2020-10-29 09:32:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33291 to 31242. [2020-10-29 09:32:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-10-29 09:32:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 36872 transitions. [2020-10-29 09:32:57,503 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 36872 transitions. Word has length 32 [2020-10-29 09:32:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:57,503 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 36872 transitions. [2020-10-29 09:32:57,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 36872 transitions. [2020-10-29 09:32:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:32:57,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:57,525 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] [2020-10-29 09:32:57,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:32:57,525 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:57,526 INFO L82 PathProgramCache]: Analyzing trace with hash 250556865, now seen corresponding path program 1 times [2020-10-29 09:32:57,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:57,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797310967] [2020-10-29 09:32:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:57,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:57,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:57,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:32:57,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:57,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 09:32:57,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:57,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:57,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:57,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:32:57,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:32:57,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:57,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:57,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:57,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:57,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:57,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:57,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:57,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:57,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:57,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:57,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:57,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:57,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:32:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:57,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797310967] [2020-10-29 09:32:57,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:57,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:57,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983168341] [2020-10-29 09:32:57,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:57,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:57,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:57,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:57,630 INFO L87 Difference]: Start difference. First operand 31242 states and 36872 transitions. Second operand 4 states. [2020-10-29 09:32:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:32:58,534 INFO L93 Difference]: Finished difference Result 50701 states and 59402 transitions. [2020-10-29 09:32:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:32:58,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-29 09:32:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:32:58,672 INFO L225 Difference]: With dead ends: 50701 [2020-10-29 09:32:58,672 INFO L226 Difference]: Without dead ends: 50698 [2020-10-29 09:32:58,688 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 [2020-10-29 09:32:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50698 states. [2020-10-29 09:32:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50698 to 48650. [2020-10-29 09:32:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48650 states. [2020-10-29 09:32:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48650 states to 48650 states and 56328 transitions. [2020-10-29 09:32:59,706 INFO L78 Accepts]: Start accepts. Automaton has 48650 states and 56328 transitions. Word has length 33 [2020-10-29 09:32:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:32:59,706 INFO L481 AbstractCegarLoop]: Abstraction has 48650 states and 56328 transitions. [2020-10-29 09:32:59,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:32:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 48650 states and 56328 transitions. [2020-10-29 09:32:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:32:59,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:32:59,743 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] [2020-10-29 09:32:59,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:32:59,743 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:32:59,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:32:59,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1029306813, now seen corresponding path program 1 times [2020-10-29 09:32:59,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:32:59,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949368881] [2020-10-29 09:32:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:32:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:59,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:59,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:59,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:32:59,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:59,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 09:32:59,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:59,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:59,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:32:59,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:32:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:32:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:59,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:32:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:32:59,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:32:59,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:32:59,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:32:59,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:32:59,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:32:59,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:32:59,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:32:59,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:32:59,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:32:59,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:32:59,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:32:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:32:59,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949368881] [2020-10-29 09:32:59,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:32:59,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:32:59,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978413214] [2020-10-29 09:32:59,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:32:59,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:32:59,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:32:59,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:32:59,835 INFO L87 Difference]: Start difference. First operand 48650 states and 56328 transitions. Second operand 4 states. [2020-10-29 09:33:01,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:01,473 INFO L93 Difference]: Finished difference Result 109066 states and 124936 transitions. [2020-10-29 09:33:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:01,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-29 09:33:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:01,476 INFO L225 Difference]: With dead ends: 109066 [2020-10-29 09:33:01,476 INFO L226 Difference]: Without dead ends: 0 [2020-10-29 09:33:01,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:01,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-29 09:33:01,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-29 09:33:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-29 09:33:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-29 09:33:01,585 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-10-29 09:33:01,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:01,585 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-29 09:33:01,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:01,585 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-29 09:33:01,585 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-29 09:33:01,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:33:01,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-29 09:36:52,349 WARN L193 SmtUtils]: Spent 3.84 m on a formula simplification. DAG size of input: 8275 DAG size of output: 32 [2020-10-29 09:36:52,407 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-29 09:36:52,408 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-29 09:36:52,408 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-29 09:36:52,408 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-29 09:36:52,408 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:36:52,408 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-29 09:36:52,409 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:36:52,409 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:36:52,409 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-29 09:36:52,409 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-29 09:36:52,409 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:36:52,410 INFO L274 CegarLoopResult]: For program point L159-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,410 INFO L274 CegarLoopResult]: For program point L93-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,410 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 179) no Hoare annotation was computed. [2020-10-29 09:36:52,410 INFO L274 CegarLoopResult]: For program point L85-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,410 INFO L274 CegarLoopResult]: For program point L77-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,410 INFO L274 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-10-29 09:36:52,411 INFO L274 CegarLoopResult]: For program point L160(line 160) no Hoare annotation was computed. [2020-10-29 09:36:52,411 INFO L274 CegarLoopResult]: For program point L119-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,411 INFO L274 CegarLoopResult]: For program point L177(line 177) no Hoare annotation was computed. [2020-10-29 09:36:52,411 INFO L274 CegarLoopResult]: For program point L144-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,411 INFO L277 CegarLoopResult]: At program point L169-1(lines 44 174) the Hoare annotation is: true [2020-10-29 09:36:52,411 INFO L274 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-10-29 09:36:52,411 INFO L274 CegarLoopResult]: For program point L145(line 145) no Hoare annotation was computed. [2020-10-29 09:36:52,411 INFO L274 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-10-29 09:36:52,412 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 179) no Hoare annotation was computed. [2020-10-29 09:36:52,412 INFO L274 CegarLoopResult]: For program point L170(line 170) no Hoare annotation was computed. [2020-10-29 09:36:52,412 INFO L270 CegarLoopResult]: At program point L170-1(lines 7 179) the Hoare annotation is: false [2020-10-29 09:36:52,412 INFO L274 CegarLoopResult]: For program point L129-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,412 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 179) the Hoare annotation is: true [2020-10-29 09:36:52,412 INFO L274 CegarLoopResult]: For program point L154-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,412 INFO L274 CegarLoopResult]: For program point L113-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,412 INFO L274 CegarLoopResult]: For program point L105-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,413 INFO L274 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-10-29 09:36:52,413 INFO L274 CegarLoopResult]: For program point L97-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,413 INFO L274 CegarLoopResult]: For program point L155(line 155) no Hoare annotation was computed. [2020-10-29 09:36:52,413 INFO L274 CegarLoopResult]: For program point L89-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,413 INFO L274 CegarLoopResult]: For program point L81-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,413 INFO L274 CegarLoopResult]: For program point L139-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,413 INFO L274 CegarLoopResult]: For program point L73(lines 73 75) no Hoare annotation was computed. [2020-10-29 09:36:52,413 INFO L274 CegarLoopResult]: For program point L73-2(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,414 INFO L274 CegarLoopResult]: For program point L164-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,414 INFO L274 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-10-29 09:36:52,414 INFO L274 CegarLoopResult]: For program point L165(line 165) no Hoare annotation was computed. [2020-10-29 09:36:52,414 INFO L274 CegarLoopResult]: For program point L124-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,414 INFO L274 CegarLoopResult]: For program point L149-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,414 INFO L274 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-10-29 09:36:52,414 INFO L274 CegarLoopResult]: For program point L150(line 150) no Hoare annotation was computed. [2020-10-29 09:36:52,414 INFO L277 CegarLoopResult]: At program point L175(lines 7 179) the Hoare annotation is: true [2020-10-29 09:36:52,415 INFO L274 CegarLoopResult]: For program point L109-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,415 INFO L274 CegarLoopResult]: For program point L134-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,415 INFO L274 CegarLoopResult]: For program point L101-1(lines 44 174) no Hoare annotation was computed. [2020-10-29 09:36:52,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:36:52 BoogieIcfgContainer [2020-10-29 09:36:52,436 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:36:52,437 INFO L168 Benchmark]: Toolchain (without parser) took 259140.23 ms. Allocated memory was 152.0 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 107.7 MB in the beginning and 1.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2020-10-29 09:36:52,438 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 152.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:36:52,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.77 ms. Allocated memory is still 152.0 MB. Free memory was 135.3 MB in the beginning and 125.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:36:52,442 INFO L168 Benchmark]: Boogie Preprocessor took 99.22 ms. Allocated memory is still 152.0 MB. Free memory was 125.0 MB in the beginning and 133.0 MB in the end (delta: -7.9 MB). Peak memory consumption was 1.8 MB. Max. memory is 8.0 GB. [2020-10-29 09:36:52,443 INFO L168 Benchmark]: RCFGBuilder took 511.07 ms. Allocated memory is still 152.0 MB. Free memory was 133.0 MB in the beginning and 111.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:36:52,443 INFO L168 Benchmark]: TraceAbstraction took 258197.59 ms. Allocated memory was 152.0 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 111.0 MB in the beginning and 1.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2020-10-29 09:36:52,445 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 152.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 305.77 ms. Allocated memory is still 152.0 MB. Free memory was 135.3 MB in the beginning and 125.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 99.22 ms. Allocated memory is still 152.0 MB. Free memory was 125.0 MB in the beginning and 133.0 MB in the end (delta: -7.9 MB). Peak memory consumption was 1.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 511.07 ms. Allocated memory is still 152.0 MB. Free memory was 133.0 MB in the beginning and 111.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 258197.59 ms. Allocated memory was 152.0 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 111.0 MB in the beginning and 1.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27.2s, OverallIterations: 30, TraceHistogramMax: 1, AutomataDifference: 12.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 230.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2807 SDtfs, 4130 SDslu, 233 SDs, 0 SdLazy, 2020 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 210 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48650occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.6s AutomataMinimizationTime, 30 MinimizatonAttempts, 8194 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 37 PreInvPairs, 2088 NumberOfFragments, 38 HoareAnnotationTreeSize, 37 FomulaSimplifications, 163721318 FormulaSimplificationTreeSizeReduction, 230.7s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 854 NumberOfCodeBlocks, 854 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 824 ConstructedInterpolants, 0 QuantifiedInterpolants, 68896 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 30 InterpolantComputations, 30 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...