/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/ldv-regression/test25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:55:24,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:55:24,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:55:24,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:55:24,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:55:24,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:55:24,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:55:24,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:55:24,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:55:24,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:55:24,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:55:24,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:55:24,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:55:24,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:55:24,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:55:24,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:55:24,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:55:24,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:55:24,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:55:24,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:55:24,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:55:24,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:55:24,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:55:24,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:55:24,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:55:24,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:55:24,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:55:24,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:55:24,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:55:24,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:55:24,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:55:24,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:55:24,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:55:24,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:55:24,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:55:24,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:55:24,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:55:24,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:55:24,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:55:24,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:55:24,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:55:24,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:55:24,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:55:24,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:55:24,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:55:24,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:55:24,267 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:55:24,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:55:24,267 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:55:24,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:55:24,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:55:24,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:55:24,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:55:24,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:55:24,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:55:24,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:55:24,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:55:24,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:55:24,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:55:24,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:55:24,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:55:24,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:55:24,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:55:24,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:55:24,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:55:24,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:55:24,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:55:24,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:55:24,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:55:24,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:55:24,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:55:24,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:55:24,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:55:24,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:55:24,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:55:24,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:55:24,780 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:55:24,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-1.c [2020-10-27 19:55:24,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab3ecf98d/6dbfd94972244e70afe3cff15a6906a8/FLAGa3f8312ce [2020-10-27 19:55:25,474 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:55:25,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-1.c [2020-10-27 19:55:25,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab3ecf98d/6dbfd94972244e70afe3cff15a6906a8/FLAGa3f8312ce [2020-10-27 19:55:25,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab3ecf98d/6dbfd94972244e70afe3cff15a6906a8 [2020-10-27 19:55:25,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:55:25,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:55:25,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:55:25,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:55:25,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:55:25,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:55:25" (1/1) ... [2020-10-27 19:55:25,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6731e40c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:25, skipping insertion in model container [2020-10-27 19:55:25,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:55:25" (1/1) ... [2020-10-27 19:55:25,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:55:25,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:55:26,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:55:26,144 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:55:26,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:55:26,183 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:55:26,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:26 WrapperNode [2020-10-27 19:55:26,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:55:26,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:55:26,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:55:26,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:55:26,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:26" (1/1) ... [2020-10-27 19:55:26,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:26" (1/1) ... [2020-10-27 19:55:26,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:26" (1/1) ... [2020-10-27 19:55:26,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:26" (1/1) ... [2020-10-27 19:55:26,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:26" (1/1) ... [2020-10-27 19:55:26,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:26" (1/1) ... [2020-10-27 19:55:26,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:26" (1/1) ... [2020-10-27 19:55:26,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:55:26,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:55:26,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:55:26,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:55:26,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:55:26,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:55:26,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:55:26,310 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:55:26,311 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-27 19:55:26,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:55:26,311 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:55:26,311 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:55:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:55:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:55:26,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:55:26,315 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 19:55:26,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:55:26,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:55:26,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:55:26,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:55:26,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:55:26,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:55:26,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:55:26,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:55:26,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:55:26,719 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:55:26,719 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 19:55:26,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:55:26 BoogieIcfgContainer [2020-10-27 19:55:26,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:55:26,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:55:26,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:55:26,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:55:26,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:55:25" (1/3) ... [2020-10-27 19:55:26,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154df7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:55:26, skipping insertion in model container [2020-10-27 19:55:26,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:55:26" (2/3) ... [2020-10-27 19:55:26,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154df7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:55:26, skipping insertion in model container [2020-10-27 19:55:26,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:55:26" (3/3) ... [2020-10-27 19:55:26,732 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-10-27 19:55:26,746 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:55:26,783 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:55:26,797 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:55:26,824 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:55:26,825 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:55:26,825 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:55:26,825 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:55:26,825 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:55:26,825 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:55:26,825 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:55:26,826 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:55:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 19:55:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 19:55:26,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:26,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:26,851 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:26,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:26,858 INFO L82 PathProgramCache]: Analyzing trace with hash 597245021, now seen corresponding path program 1 times [2020-10-27 19:55:26,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:26,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215903929] [2020-10-27 19:55:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:27,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:27,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:27,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:27,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 19:55:27,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:27,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-27 19:55:27,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:27,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:27,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:55:27,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:27,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:55:27,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:27,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:27,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:27,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:27,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 19:55:27,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:27,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:27,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:27,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-27 19:55:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:27,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:27,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:27,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:27,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:27,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 19:55:27,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:27,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:27,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:27,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:27,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 19:55:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:27,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215903929] [2020-10-27 19:55:27,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:55:27,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:55:27,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293358837] [2020-10-27 19:55:27,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:55:27,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:27,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:55:27,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:55:27,652 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-27 19:55:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:27,788 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-10-27 19:55:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:55:27,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-27 19:55:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:27,798 INFO L225 Difference]: With dead ends: 47 [2020-10-27 19:55:27,798 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 19:55:27,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:55:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 19:55:27,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 19:55:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 19:55:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 19:55:27,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-27 19:55:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:27,845 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 19:55:27,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:55:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 19:55:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 19:55:27,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:27,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:27,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:55:27,847 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash -651701326, now seen corresponding path program 1 times [2020-10-27 19:55:27,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:27,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287642658] [2020-10-27 19:55:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:27,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:27,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:28,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:28,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:55:28,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:28,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-27 19:55:28,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:28,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:55:28,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:55:28,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:55:28,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:28,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:28,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:28,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:28,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:28,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:28,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:55:28,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:28,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:28,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:55:28,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 19:55:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:28,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:28,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:28,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:28,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:28,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:55:28,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:28,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:28,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:28,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:28,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:28,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287642658] [2020-10-27 19:55:28,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:55:28,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:55:28,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922307305] [2020-10-27 19:55:28,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:55:28,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:28,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:55:28,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:55:28,613 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-10-27 19:55:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:28,740 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-27 19:55:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:55:28,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 19:55:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:28,741 INFO L225 Difference]: With dead ends: 32 [2020-10-27 19:55:28,742 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 19:55:28,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:55:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 19:55:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 19:55:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 19:55:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 19:55:28,751 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-10-27 19:55:28,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:28,752 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 19:55:28,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:55:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 19:55:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:55:28,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:28,753 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:28,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:55:28,754 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1860323927, now seen corresponding path program 1 times [2020-10-27 19:55:28,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:28,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512656382] [2020-10-27 19:55:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:28,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:28,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:29,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:29,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:55:29,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:29,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-27 19:55:29,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:29,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:55:29,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:55:29,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:55:29,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:29,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:29,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:29,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:29,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:29,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:29,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 19:55:29,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:29,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:29,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:29,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:29,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:29,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 19:55:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:29,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:29,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:29,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:29,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:55:29,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:29,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:29,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:29,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512656382] [2020-10-27 19:55:29,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:29,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:55:29,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558390623] [2020-10-27 19:55:29,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:55:29,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:29,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:55:29,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:55:29,272 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-10-27 19:55:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:29,383 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-27 19:55:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:55:29,384 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 19:55:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:29,385 INFO L225 Difference]: With dead ends: 34 [2020-10-27 19:55:29,385 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 19:55:29,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:55:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 19:55:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 19:55:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 19:55:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 19:55:29,392 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2020-10-27 19:55:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:29,393 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 19:55:29,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:55:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 19:55:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:55:29,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:29,394 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:29,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:55:29,395 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:29,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2144971708, now seen corresponding path program 2 times [2020-10-27 19:55:29,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:29,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276833533] [2020-10-27 19:55:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:29,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:29,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:29,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:29,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:55:29,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:29,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-27 19:55:29,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:29,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:55:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:55:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:55:29,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:29,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:29,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:29,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:29,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:29,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:29,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:29,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:29,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:29,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:29,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:29,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:29,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 19:55:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:29,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:29,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:29,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:29,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:29,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:29,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:29,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:29,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276833533] [2020-10-27 19:55:29,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:29,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:55:29,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865946509] [2020-10-27 19:55:29,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:55:29,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:29,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:55:29,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:55:29,893 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-10-27 19:55:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:30,053 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-10-27 19:55:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:55:30,054 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 19:55:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:30,055 INFO L225 Difference]: With dead ends: 36 [2020-10-27 19:55:30,055 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 19:55:30,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:55:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 19:55:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 19:55:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 19:55:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-27 19:55:30,069 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2020-10-27 19:55:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:30,069 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-27 19:55:30,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:55:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-27 19:55:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:55:30,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:30,072 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:30,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:55:30,072 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:30,073 INFO L82 PathProgramCache]: Analyzing trace with hash 813582305, now seen corresponding path program 3 times [2020-10-27 19:55:30,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:30,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112752838] [2020-10-27 19:55:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:30,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:30,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:30,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:30,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:55:30,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:30,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-27 19:55:30,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:55:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:55:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:55:30,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:30,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:30,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:30,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:30,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:30,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:30,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:55:30,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:30,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:30,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:30,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:30,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:30,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 19:55:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:30,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:30,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:30,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:30,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:30,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:30,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:30,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:30,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:30,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:30,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:30,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112752838] [2020-10-27 19:55:30,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:30,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:55:30,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584512206] [2020-10-27 19:55:30,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:55:30,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:30,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:55:30,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:55:30,648 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-10-27 19:55:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:30,813 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-10-27 19:55:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:55:30,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 19:55:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:30,815 INFO L225 Difference]: With dead ends: 38 [2020-10-27 19:55:30,815 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 19:55:30,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:55:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 19:55:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 19:55:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 19:55:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 19:55:30,821 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2020-10-27 19:55:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:30,822 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 19:55:30,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:55:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 19:55:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:55:30,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:30,823 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:30,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:55:30,824 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:30,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:30,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1248620230, now seen corresponding path program 4 times [2020-10-27 19:55:30,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:30,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443858955] [2020-10-27 19:55:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:30,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:30,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:31,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:31,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:55:31,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:31,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-27 19:55:31,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:31,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:55:31,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:55:31,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:55:31,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:31,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:31,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:31,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:31,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:31,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:31,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:55:31,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:31,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:31,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:31,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:31,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:31,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 19:55:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:31,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:31,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:31,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:31,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:31,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:31,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:31,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:31,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:31,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:31,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:31,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443858955] [2020-10-27 19:55:31,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:31,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:55:31,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753820890] [2020-10-27 19:55:31,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:55:31,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:31,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:55:31,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:55:31,451 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-10-27 19:55:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:31,671 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-27 19:55:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:55:31,671 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 19:55:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:31,672 INFO L225 Difference]: With dead ends: 40 [2020-10-27 19:55:31,673 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 19:55:31,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:55:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 19:55:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 19:55:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 19:55:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-27 19:55:31,680 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2020-10-27 19:55:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:31,681 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-27 19:55:31,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:55:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-27 19:55:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:55:31,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:31,682 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:31,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:55:31,683 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:31,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1586728853, now seen corresponding path program 5 times [2020-10-27 19:55:31,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:31,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256080644] [2020-10-27 19:55:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:31,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:31,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:32,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:32,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:55:32,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 19:55:32,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:55:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:55:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:55:32,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:32,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:32,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:32,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:32,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:32,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:32,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:55:32,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:32,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:32,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:32,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:32,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:32,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 19:55:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:32,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:32,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:32,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:32,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:32,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:32,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:32,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:32,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:32,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:32,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:32,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256080644] [2020-10-27 19:55:32,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:32,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:55:32,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143688481] [2020-10-27 19:55:32,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:55:32,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:55:32,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:55:32,359 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2020-10-27 19:55:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:32,577 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-10-27 19:55:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:55:32,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 19:55:32,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:32,579 INFO L225 Difference]: With dead ends: 42 [2020-10-27 19:55:32,579 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 19:55:32,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:55:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 19:55:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 19:55:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 19:55:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-27 19:55:32,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2020-10-27 19:55:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:32,586 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-27 19:55:32,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:55:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-27 19:55:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:55:32,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:32,588 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:32,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:55:32,588 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash 947035344, now seen corresponding path program 6 times [2020-10-27 19:55:32,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:32,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624429009] [2020-10-27 19:55:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:32,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:32,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:33,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:33,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:55:33,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:33,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-27 19:55:33,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:55:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:55:33,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:55:33,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:33,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:33,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:33,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:33,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:33,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:33,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:33,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:33,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 19:55:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:33,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:33,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:33,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:33,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:33,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:33,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:33,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:33,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:33,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:33,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:33,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624429009] [2020-10-27 19:55:33,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:33,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:55:33,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455544347] [2020-10-27 19:55:33,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:55:33,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:33,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:55:33,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:55:33,380 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-10-27 19:55:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:33,606 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-10-27 19:55:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:55:33,606 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 19:55:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:33,607 INFO L225 Difference]: With dead ends: 44 [2020-10-27 19:55:33,607 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 19:55:33,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:55:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 19:55:33,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 19:55:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 19:55:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-27 19:55:33,614 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2020-10-27 19:55:33,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:33,614 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-27 19:55:33,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:55:33,615 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-27 19:55:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:55:33,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:33,616 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:33,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:55:33,616 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:33,617 INFO L82 PathProgramCache]: Analyzing trace with hash 647971829, now seen corresponding path program 7 times [2020-10-27 19:55:33,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:33,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226151118] [2020-10-27 19:55:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:33,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:33,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:34,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:34,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:55:34,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:34,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-27 19:55:34,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:55:34,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:55:34,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:55:34,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:34,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:34,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:34,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:34,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:34,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:34,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:34,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:34,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:34,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:34,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:34,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:34,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-27 19:55:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:34,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:34,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:34,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:34,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:34,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:34,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:34,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:34,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226151118] [2020-10-27 19:55:34,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:34,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:55:34,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751601475] [2020-10-27 19:55:34,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:55:34,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:34,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:55:34,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:55:34,500 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-10-27 19:55:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:34,824 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-27 19:55:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:55:34,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 19:55:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:34,826 INFO L225 Difference]: With dead ends: 46 [2020-10-27 19:55:34,826 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 19:55:34,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:55:34,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 19:55:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 19:55:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 19:55:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 19:55:34,838 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2020-10-27 19:55:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:34,839 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 19:55:34,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:55:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 19:55:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:55:34,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:34,843 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:34,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:55:34,844 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1010742746, now seen corresponding path program 8 times [2020-10-27 19:55:34,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:34,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988356369] [2020-10-27 19:55:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:34,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:35,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:35,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:55:35,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:35,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-27 19:55:35,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:35,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:55:35,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:55:35,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:55:35,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:35,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:35,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:35,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:35,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:35,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:35,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:35,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:35,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:35,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:35,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:35,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:35,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 19:55:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:35,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:35,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:35,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:35,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:35,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:35,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:35,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:35,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:35,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:35,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988356369] [2020-10-27 19:55:35,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:35,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:55:35,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994952525] [2020-10-27 19:55:35,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:55:35,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:35,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:55:35,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:55:35,852 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2020-10-27 19:55:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:36,156 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-10-27 19:55:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:55:36,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 19:55:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:36,158 INFO L225 Difference]: With dead ends: 48 [2020-10-27 19:55:36,158 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 19:55:36,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:55:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 19:55:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 19:55:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 19:55:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 19:55:36,164 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2020-10-27 19:55:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:36,165 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 19:55:36,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:55:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 19:55:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:55:36,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:36,166 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:36,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:55:36,166 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:36,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1741243007, now seen corresponding path program 9 times [2020-10-27 19:55:36,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:36,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805885541] [2020-10-27 19:55:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:36,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:36,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:37,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:37,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:55:37,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:55:37,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 849 [2020-10-27 19:55:37,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:37,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:55:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:55:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:55:37,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:37,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:37,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:37,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:37,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:37,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:37,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:55:37,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:37,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:37,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:37,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:37,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:37,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 19:55:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:37,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:37,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:37,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:37,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:37,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:37,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:37,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:37,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:37,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:37,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:37,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805885541] [2020-10-27 19:55:37,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:37,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:55:37,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446608453] [2020-10-27 19:55:37,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:55:37,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:37,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:55:37,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:55:37,257 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-10-27 19:55:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:37,637 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-10-27 19:55:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:55:37,637 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 19:55:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:37,639 INFO L225 Difference]: With dead ends: 50 [2020-10-27 19:55:37,639 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 19:55:37,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:55:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 19:55:37,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 19:55:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 19:55:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 19:55:37,646 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2020-10-27 19:55:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:37,646 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 19:55:37,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:55:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 19:55:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:55:37,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:37,648 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:37,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:55:37,648 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:37,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:37,649 INFO L82 PathProgramCache]: Analyzing trace with hash -622642716, now seen corresponding path program 10 times [2020-10-27 19:55:37,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:37,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391987586] [2020-10-27 19:55:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:37,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:37,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:37,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:55:37,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:37,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 19:55:37,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:55:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:55:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:55:37,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:37,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:37,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:37,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:37,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:37,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:37,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:55:37,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:37,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:37,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:37,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:37,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:55:37,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 19:55:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:37,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:37,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:37,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:37,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:37,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:55:37,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:37,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:37,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:37,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:37,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 19:55:37,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391987586] [2020-10-27 19:55:37,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:55:37,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:55:37,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966516228] [2020-10-27 19:55:37,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:55:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:55:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:55:37,850 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 4 states. [2020-10-27 19:55:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:37,917 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-27 19:55:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:55:37,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-27 19:55:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:37,919 INFO L225 Difference]: With dead ends: 76 [2020-10-27 19:55:37,919 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 19:55:37,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:55:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 19:55:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 19:55:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 19:55:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-27 19:55:37,932 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-27 19:55:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:37,932 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-27 19:55:37,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:55:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-27 19:55:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:55:37,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:37,936 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:37,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:55:37,937 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:37,938 INFO L82 PathProgramCache]: Analyzing trace with hash -675187390, now seen corresponding path program 1 times [2020-10-27 19:55:37,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:37,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912340898] [2020-10-27 19:55:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:37,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:38,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:38,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:55:38,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:38,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 19:55:38,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:55:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:55:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:55:38,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:38,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:38,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:38,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:38,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:38,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:38,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:55:38,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:38,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:38,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:38,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:38,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:38,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 19:55:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:38,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:38,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:38,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:38,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:38,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:38,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:38,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:38,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:38,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:38,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 19:55:38,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912340898] [2020-10-27 19:55:38,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:38,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:55:38,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974793741] [2020-10-27 19:55:38,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:55:38,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:38,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:55:38,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:55:38,174 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 5 states. [2020-10-27 19:55:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:38,237 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-27 19:55:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:55:38,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-27 19:55:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:38,238 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:55:38,238 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 19:55:38,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:55:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 19:55:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 19:55:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 19:55:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-27 19:55:38,250 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-10-27 19:55:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:38,250 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-27 19:55:38,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:55:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-27 19:55:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:55:38,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:38,253 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:38,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:55:38,253 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:38,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:38,254 INFO L82 PathProgramCache]: Analyzing trace with hash 368988448, now seen corresponding path program 2 times [2020-10-27 19:55:38,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:38,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48810401] [2020-10-27 19:55:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:38,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:38,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:38,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:55:38,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:38,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 19:55:38,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:38,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:55:38,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:55:38,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:55:38,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:38,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:38,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:38,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:38,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:38,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:38,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:38,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:38,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:38,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:38,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:38,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 19:55:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:38,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:38,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:38,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:38,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:38,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:38,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:38,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:38,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:38,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:38,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 19:55:38,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48810401] [2020-10-27 19:55:38,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:38,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:55:38,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743171897] [2020-10-27 19:55:38,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:55:38,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:38,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:55:38,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:55:38,558 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 6 states. [2020-10-27 19:55:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:38,635 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-27 19:55:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:55:38,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-27 19:55:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:38,637 INFO L225 Difference]: With dead ends: 80 [2020-10-27 19:55:38,637 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 19:55:38,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:55:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 19:55:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 19:55:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 19:55:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-27 19:55:38,648 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-10-27 19:55:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:38,648 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-27 19:55:38,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:55:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-27 19:55:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:55:38,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:38,649 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:38,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:55:38,650 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:38,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1200378498, now seen corresponding path program 3 times [2020-10-27 19:55:38,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:38,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724155666] [2020-10-27 19:55:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:38,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:39,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:39,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:55:39,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:39,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-27 19:55:39,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:39,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:55:39,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:55:39,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:55:39,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:39,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:39,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:39,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:39,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:39,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:39,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:55:39,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:39,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:39,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:39,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:39,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:39,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-27 19:55:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:39,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:39,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:39,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:39,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:39,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 19:55:39,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:39,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:39,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:39,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:39,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 19:55:39,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724155666] [2020-10-27 19:55:39,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:39,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:55:39,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866782445] [2020-10-27 19:55:39,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:55:39,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:39,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:55:39,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:55:39,171 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 7 states. [2020-10-27 19:55:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:39,256 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-27 19:55:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:55:39,257 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-27 19:55:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:39,258 INFO L225 Difference]: With dead ends: 82 [2020-10-27 19:55:39,258 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 19:55:39,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:55:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 19:55:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 19:55:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 19:55:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-27 19:55:39,275 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-10-27 19:55:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:39,275 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-27 19:55:39,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:55:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-27 19:55:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:55:39,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:39,276 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:39,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:55:39,276 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:39,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1828492708, now seen corresponding path program 4 times [2020-10-27 19:55:39,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:39,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631956542] [2020-10-27 19:55:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:39,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:39,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:39,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:55:39,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:39,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-27 19:55:39,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:39,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:55:39,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:55:39,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:55:39,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:39,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:39,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:39,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:39,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:39,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:39,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:39,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:39,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:39,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:39,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-27 19:55:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:39,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:39,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:39,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:39,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:39,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:39,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:39,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:39,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:39,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:39,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 19:55:39,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631956542] [2020-10-27 19:55:39,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:39,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:55:39,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026280321] [2020-10-27 19:55:39,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:55:39,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:39,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:55:39,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:55:39,756 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 8 states. [2020-10-27 19:55:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:39,852 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-27 19:55:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:55:39,853 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-27 19:55:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:39,854 INFO L225 Difference]: With dead ends: 84 [2020-10-27 19:55:39,854 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 19:55:39,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:55:39,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 19:55:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 19:55:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 19:55:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-27 19:55:39,863 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-27 19:55:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:39,864 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-27 19:55:39,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:55:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-27 19:55:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:55:39,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:39,865 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:39,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:55:39,865 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:39,866 INFO L82 PathProgramCache]: Analyzing trace with hash 144140218, now seen corresponding path program 5 times [2020-10-27 19:55:39,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:39,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055421960] [2020-10-27 19:55:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:39,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:40,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:40,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:55:40,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:40,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-27 19:55:40,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:40,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:55:40,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:55:40,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:55:40,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:40,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:40,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:40,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:40,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:40,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:40,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:40,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:40,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:40,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:40,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:40,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:40,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 19:55:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:40,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:40,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:40,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:40,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:40,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:40,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:40,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:40,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:40,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:40,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 19:55:40,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055421960] [2020-10-27 19:55:40,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:40,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:55:40,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183316503] [2020-10-27 19:55:40,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:55:40,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:40,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:55:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:55:40,479 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 9 states. [2020-10-27 19:55:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:40,582 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-27 19:55:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:55:40,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-27 19:55:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:40,583 INFO L225 Difference]: With dead ends: 86 [2020-10-27 19:55:40,583 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 19:55:40,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:55:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 19:55:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 19:55:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 19:55:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-27 19:55:40,592 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-27 19:55:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:40,592 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-27 19:55:40,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:55:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-27 19:55:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:55:40,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:40,593 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:40,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:55:40,593 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:40,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:40,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1763804568, now seen corresponding path program 6 times [2020-10-27 19:55:40,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:40,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776627296] [2020-10-27 19:55:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:40,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:41,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:41,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 19:55:41,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:41,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-27 19:55:41,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:41,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:55:41,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:55:41,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:55:41,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:41,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:41,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:41,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:41,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:41,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:41,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:41,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:41,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:41,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:41,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:41,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:41,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 19:55:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:41,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:41,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:41,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:41,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:41,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:41,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:41,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:41,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:41,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:41,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 19:55:41,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776627296] [2020-10-27 19:55:41,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:41,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:55:41,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860210447] [2020-10-27 19:55:41,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:55:41,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:41,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:55:41,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:55:41,348 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 10 states. [2020-10-27 19:55:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:41,463 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-27 19:55:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:55:41,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-27 19:55:41,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:41,464 INFO L225 Difference]: With dead ends: 88 [2020-10-27 19:55:41,465 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 19:55:41,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:55:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 19:55:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 19:55:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 19:55:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-27 19:55:41,477 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2020-10-27 19:55:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:41,477 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-27 19:55:41,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:55:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-27 19:55:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 19:55:41,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:41,478 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:41,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:55:41,478 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash -811883530, now seen corresponding path program 7 times [2020-10-27 19:55:41,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:41,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435496599] [2020-10-27 19:55:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:41,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:42,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:42,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 19:55:42,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:42,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-27 19:55:42,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:42,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:55:42,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:55:42,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:55:42,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:42,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:42,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:42,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:42,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:42,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:42,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:55:42,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:42,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:42,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:42,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-27 19:55:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:42,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:42,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:42,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:42,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:42,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:42,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:42,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 19:55:42,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435496599] [2020-10-27 19:55:42,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:42,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:55:42,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975068873] [2020-10-27 19:55:42,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:55:42,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:42,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:55:42,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:55:42,286 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 11 states. [2020-10-27 19:55:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:42,408 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-27 19:55:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:55:42,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-27 19:55:42,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:42,409 INFO L225 Difference]: With dead ends: 90 [2020-10-27 19:55:42,409 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 19:55:42,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:55:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 19:55:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 19:55:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 19:55:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-27 19:55:42,415 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2020-10-27 19:55:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:42,415 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-27 19:55:42,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:55:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-27 19:55:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 19:55:42,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:42,416 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:42,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:55:42,416 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2146983212, now seen corresponding path program 8 times [2020-10-27 19:55:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:42,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126242169] [2020-10-27 19:55:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:42,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:43,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:43,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 19:55:43,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:43,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-27 19:55:43,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:43,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:55:43,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:55:43,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:55:43,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:43,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:43,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:43,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:43,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:43,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:43,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:43,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:43,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:43,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-27 19:55:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:43,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:43,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:43,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:43,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:43,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:43,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:43,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:43,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:43,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:43,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 19:55:43,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126242169] [2020-10-27 19:55:43,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:43,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:55:43,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255903332] [2020-10-27 19:55:43,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:55:43,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:43,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:55:43,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:55:43,416 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 12 states. [2020-10-27 19:55:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:43,550 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-27 19:55:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:55:43,551 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-27 19:55:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:43,551 INFO L225 Difference]: With dead ends: 92 [2020-10-27 19:55:43,552 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 19:55:43,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:55:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 19:55:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 19:55:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 19:55:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-27 19:55:43,563 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-10-27 19:55:43,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:43,564 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-27 19:55:43,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:55:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-27 19:55:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 19:55:43,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:43,567 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:43,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:55:43,567 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:43,568 INFO L82 PathProgramCache]: Analyzing trace with hash -982556110, now seen corresponding path program 9 times [2020-10-27 19:55:43,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:43,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539760760] [2020-10-27 19:55:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:43,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:44,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:44,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 19:55:44,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:44,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 981 [2020-10-27 19:55:44,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:44,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:55:44,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:55:44,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:55:44,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:44,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:44,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:44,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:44,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:44,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:44,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:44,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:44,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:44,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:44,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:44,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:44,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 19:55:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:44,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:44,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:44,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:44,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:44,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:44,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:44,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:44,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:55:44,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:44,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 19:55:44,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539760760] [2020-10-27 19:55:44,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:44,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:55:44,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963650659] [2020-10-27 19:55:44,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:55:44,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:55:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:55:44,764 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2020-10-27 19:55:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:44,902 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-27 19:55:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:55:44,903 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-27 19:55:44,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:44,904 INFO L225 Difference]: With dead ends: 93 [2020-10-27 19:55:44,904 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 19:55:44,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:55:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 19:55:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 19:55:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 19:55:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-27 19:55:44,911 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2020-10-27 19:55:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:44,911 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-27 19:55:44,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:55:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-27 19:55:44,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 19:55:44,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:44,917 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:44,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:55:44,918 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:44,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1340391952, now seen corresponding path program 10 times [2020-10-27 19:55:44,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:44,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452013584] [2020-10-27 19:55:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 19:55:44,993 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 19:55:44,994 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 19:55:44,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:55:45,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 07:55:45 BoogieIcfgContainer [2020-10-27 19:55:45,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 19:55:45,042 INFO L168 Benchmark]: Toolchain (without parser) took 19188.67 ms. Allocated memory was 151.0 MB in the beginning and 420.5 MB in the end (delta: 269.5 MB). Free memory was 126.4 MB in the beginning and 198.0 MB in the end (delta: -71.6 MB). Peak memory consumption was 199.4 MB. Max. memory is 8.0 GB. [2020-10-27 19:55:45,045 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 435.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:55:45,046 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.69 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 19:55:45,047 INFO L168 Benchmark]: Boogie Preprocessor took 42.40 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 19:55:45,047 INFO L168 Benchmark]: RCFGBuilder took 493.39 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 97.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-27 19:55:45,048 INFO L168 Benchmark]: TraceAbstraction took 18310.90 ms. Allocated memory was 151.0 MB in the beginning and 420.5 MB in the end (delta: 269.5 MB). Free memory was 97.0 MB in the beginning and 198.0 MB in the end (delta: -101.0 MB). Peak memory consumption was 170.1 MB. Max. memory is 8.0 GB. [2020-10-27 19:55:45,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 435.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 325.69 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.40 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 493.39 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 97.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18310.90 ms. Allocated memory was 151.0 MB in the beginning and 420.5 MB in the end (delta: 269.5 MB). Free memory was 97.0 MB in the beginning and 198.0 MB in the end (delta: -101.0 MB). Peak memory consumption was 170.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND FALSE !(j < 10) [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND FALSE !(i < *pa) [L39] CALL, EXPR check(&cont, i) [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] RET, EXPR check(&cont, i) [L39] COND TRUE !check(&cont, i) [L47] CALL reach_error() [L3] __assert_fail("0", "test25-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.1s, OverallIterations: 22, TraceHistogramMax: 11, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 377 SDtfs, 173 SDslu, 1566 SDs, 0 SdLazy, 1454 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.5s InterpolantComputationTime, 837 NumberOfCodeBlocks, 837 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 757 ConstructedInterpolants, 0 QuantifiedInterpolants, 92825 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 1100/1715 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 incorrect! Received shutdown request...