/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:22:36,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:22:36,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:22:37,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:22:37,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:22:37,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:22:37,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:22:37,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:22:37,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:22:37,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:22:37,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:22:37,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:22:37,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:22:37,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:22:37,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:22:37,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:22:37,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:22:37,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:22:37,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:22:37,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:22:37,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:22:37,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:22:37,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:22:37,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:22:37,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:22:37,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:22:37,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:22:37,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:22:37,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:22:37,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:22:37,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:22:37,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:22:37,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:22:37,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:22:37,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:22:37,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:22:37,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:22:37,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:22:37,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:22:37,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:22:37,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:22:37,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 08:22:37,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:22:37,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:22:37,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:22:37,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:22:37,262 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:22:37,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:22:37,262 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:22:37,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:22:37,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:22:37,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:22:37,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:22:37,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:22:37,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:22:37,265 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:22:37,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:22:37,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:22:37,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:22:37,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:22:37,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:22:37,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:22:37,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:22:37,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:22:37,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:22:37,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:22:37,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:22:37,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:22:37,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:22:37,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:22:37,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:22:37,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:22:37,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:22:37,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:22:37,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:22:37,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:22:37,852 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:22:37,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label48.c [2020-10-29 08:22:37,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e7be9bd7/0c9911b73db8498981ff33f47645d788/FLAG21d5bff1d [2020-10-29 08:22:39,292 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:22:39,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label48.c [2020-10-29 08:22:39,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e7be9bd7/0c9911b73db8498981ff33f47645d788/FLAG21d5bff1d [2020-10-29 08:22:39,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e7be9bd7/0c9911b73db8498981ff33f47645d788 [2020-10-29 08:22:39,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:22:39,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:22:39,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:22:39,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:22:39,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:22:39,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:22:39" (1/1) ... [2020-10-29 08:22:39,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bf37451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:39, skipping insertion in model container [2020-10-29 08:22:39,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:22:39" (1/1) ... [2020-10-29 08:22:39,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:22:39,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:22:41,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:22:41,199 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:22:41,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:22:41,797 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:22:41,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:41 WrapperNode [2020-10-29 08:22:41,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:22:41,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:22:41,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:22:41,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:22:41,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:41" (1/1) ... [2020-10-29 08:22:41,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:41" (1/1) ... [2020-10-29 08:22:41,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:41" (1/1) ... [2020-10-29 08:22:41,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:41" (1/1) ... [2020-10-29 08:22:42,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:41" (1/1) ... [2020-10-29 08:22:42,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:41" (1/1) ... [2020-10-29 08:22:42,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:41" (1/1) ... [2020-10-29 08:22:42,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:22:42,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:22:42,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:22:42,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:22:42,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:22:42,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:22:42,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:22:42,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:22:42,324 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:22:42,324 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:22:42,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:22:42,325 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:22:42,325 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:22:42,325 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:22:42,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:22:42,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:22:42,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:22:42,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:22:42,326 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:22:42,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:22:42,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:22:42,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:22:42,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:22:42,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:22:42,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:22:42,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:22:52,179 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:22:52,179 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:22:52,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:22:52 BoogieIcfgContainer [2020-10-29 08:22:52,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:22:52,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:22:52,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:22:52,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:22:52,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:22:39" (1/3) ... [2020-10-29 08:22:52,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b83edc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:22:52, skipping insertion in model container [2020-10-29 08:22:52,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:22:41" (2/3) ... [2020-10-29 08:22:52,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b83edc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:22:52, skipping insertion in model container [2020-10-29 08:22:52,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:22:52" (3/3) ... [2020-10-29 08:22:52,202 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label48.c [2020-10-29 08:22:52,216 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:22:52,224 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:22:52,239 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:22:52,290 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:22:52,291 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:22:52,291 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:22:52,291 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:22:52,291 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:22:52,291 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:22:52,292 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:22:52,292 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:22:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-29 08:22:52,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 08:22:52,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:22:52,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:22:52,349 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:22:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:22:52,358 INFO L82 PathProgramCache]: Analyzing trace with hash -946213302, now seen corresponding path program 1 times [2020-10-29 08:22:52,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:22:52,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845982112] [2020-10-29 08:22:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:22:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:52,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:53,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:53,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 08:22:53,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:22:53,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-29 08:22:53,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:53,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:53,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:22:53,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:22:53,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 08:22:53,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:22:53,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:22:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:53,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:53,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:53,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:22:53,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:22:53,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-29 08:22:53,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:53,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:53,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:22:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:22:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:22:53,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:22:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:22:53,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845982112] [2020-10-29 08:22:53,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:22:53,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:22:53,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670883547] [2020-10-29 08:22:53,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:22:53,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:22:53,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:22:53,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:22:53,928 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-29 08:23:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:23:09,798 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-29 08:23:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:23:09,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-29 08:23:09,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:23:09,839 INFO L225 Difference]: With dead ends: 1694 [2020-10-29 08:23:09,839 INFO L226 Difference]: Without dead ends: 1010 [2020-10-29 08:23:09,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:23:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-29 08:23:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-29 08:23:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-29 08:23:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-29 08:23:10,013 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 50 [2020-10-29 08:23:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:23:10,015 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-29 08:23:10,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:23:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-29 08:23:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-29 08:23:10,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:23:10,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:23:10,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:23:10,033 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:23:10,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:23:10,036 INFO L82 PathProgramCache]: Analyzing trace with hash 932086282, now seen corresponding path program 1 times [2020-10-29 08:23:10,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:23:10,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690371391] [2020-10-29 08:23:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:23:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:10,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:10,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:11,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:11,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-29 08:23:11,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:23:11,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1788 [2020-10-29 08:23:11,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:11,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:11,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:23:11,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:23:11,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:23:11,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:23:12,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:23:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:12,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:12,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:12,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:23:12,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:12,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 08:23:12,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:12,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:12,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:23:12,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:23:12,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:23:12,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:23:12,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:23:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:12,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:12,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:12,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:23:12,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:12,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-29 08:23:12,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:12,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:23:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:23:12,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:23:12,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:23:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:23:12,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690371391] [2020-10-29 08:23:12,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:23:12,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:23:12,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874535801] [2020-10-29 08:23:12,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:23:12,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:23:12,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:23:12,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:23:12,409 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-29 08:23:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:23:27,833 INFO L93 Difference]: Finished difference Result 2447 states and 3895 transitions. [2020-10-29 08:23:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:23:27,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-10-29 08:23:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:23:27,845 INFO L225 Difference]: With dead ends: 2447 [2020-10-29 08:23:27,846 INFO L226 Difference]: Without dead ends: 1461 [2020-10-29 08:23:27,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:23:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2020-10-29 08:23:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1433. [2020-10-29 08:23:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2020-10-29 08:23:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1859 transitions. [2020-10-29 08:23:27,939 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1859 transitions. Word has length 121 [2020-10-29 08:23:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:23:27,940 INFO L481 AbstractCegarLoop]: Abstraction has 1433 states and 1859 transitions. [2020-10-29 08:23:27,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:23:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1859 transitions. [2020-10-29 08:23:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-29 08:23:27,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:23:27,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:23:27,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:23:27,979 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:23:27,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:23:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash -603647785, now seen corresponding path program 1 times [2020-10-29 08:23:27,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:23:27,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350890821] [2020-10-29 08:23:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:23:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:28,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:28,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:29,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:29,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-29 08:23:29,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:23:29,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1439 [2020-10-29 08:23:29,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:29,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:29,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:23:29,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:23:29,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-29 08:23:29,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:23:29,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:23:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:29,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:29,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:29,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:23:29,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:29,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 08:23:29,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:29,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:29,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:23:29,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:23:29,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:23:29,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:23:29,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:23:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:29,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:30,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:30,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:23:30,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:30,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-29 08:23:30,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:30,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:30,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:23:30,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:23:30,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 08:23:30,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:23:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:23:30,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350890821] [2020-10-29 08:23:30,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:23:30,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:23:30,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674063650] [2020-10-29 08:23:30,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 08:23:30,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:23:30,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 08:23:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:23:30,379 INFO L87 Difference]: Start difference. First operand 1433 states and 1859 transitions. Second operand 8 states. [2020-10-29 08:23:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:23:52,400 INFO L93 Difference]: Finished difference Result 3426 states and 4704 transitions. [2020-10-29 08:23:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:23:52,402 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-10-29 08:23:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:23:52,415 INFO L225 Difference]: With dead ends: 3426 [2020-10-29 08:23:52,415 INFO L226 Difference]: Without dead ends: 2387 [2020-10-29 08:23:52,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:23:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2020-10-29 08:23:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2341. [2020-10-29 08:23:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2341 states. [2020-10-29 08:23:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 3057 transitions. [2020-10-29 08:23:52,493 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 3057 transitions. Word has length 124 [2020-10-29 08:23:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:23:52,494 INFO L481 AbstractCegarLoop]: Abstraction has 2341 states and 3057 transitions. [2020-10-29 08:23:52,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 08:23:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 3057 transitions. [2020-10-29 08:23:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-29 08:23:52,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:23:52,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:23:52,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:23:52,497 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:23:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:23:52,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1982141590, now seen corresponding path program 1 times [2020-10-29 08:23:52,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:23:52,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113080673] [2020-10-29 08:23:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:23:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:52,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:52,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:52,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-29 08:23:52,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:52,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-29 08:23:52,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:52,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:52,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:23:52,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:23:52,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 08:23:52,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:23:53,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:23:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:53,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:53,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:53,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:23:53,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:53,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:23:53,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:53,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:23:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:23:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:23:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:23:53,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:23:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:53,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:53,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:53,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:23:53,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:53,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-29 08:23:53,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:53,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:53,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:23:53,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:23:53,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:23:53,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:23:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:23:53,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113080673] [2020-10-29 08:23:53,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:23:53,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:23:53,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891291527] [2020-10-29 08:23:53,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:23:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:23:53,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:23:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:23:53,317 INFO L87 Difference]: Start difference. First operand 2341 states and 3057 transitions. Second operand 5 states. [2020-10-29 08:24:06,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:24:06,560 INFO L93 Difference]: Finished difference Result 4690 states and 6491 transitions. [2020-10-29 08:24:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:24:06,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2020-10-29 08:24:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:24:06,579 INFO L225 Difference]: With dead ends: 4690 [2020-10-29 08:24:06,579 INFO L226 Difference]: Without dead ends: 2788 [2020-10-29 08:24:06,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:24:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2020-10-29 08:24:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 2778. [2020-10-29 08:24:06,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2778 states. [2020-10-29 08:24:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 3844 transitions. [2020-10-29 08:24:06,677 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 3844 transitions. Word has length 137 [2020-10-29 08:24:06,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:24:06,678 INFO L481 AbstractCegarLoop]: Abstraction has 2778 states and 3844 transitions. [2020-10-29 08:24:06,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:24:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 3844 transitions. [2020-10-29 08:24:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-29 08:24:06,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:06,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:24:06,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:24:06,684 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:06,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1716225058, now seen corresponding path program 1 times [2020-10-29 08:24:06,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:06,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27984886] [2020-10-29 08:24:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:06,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:07,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:09,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:11,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:11,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-29 08:24:11,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:24:11,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 08:24:11,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:11,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:11,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:24:11,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:24:11,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-29 08:24:11,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:24:11,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:11,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:11,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:11,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:11,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:11,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 08:24:11,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:11,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:11,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:11,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:11,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:24:11,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:24:12,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:24:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:12,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:12,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:12,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:24:12,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:12,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-29 08:24:12,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:12,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:24:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:24:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:24:12,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:12,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:24:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:12,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:12,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:12,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:24:12,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:12,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-29 08:24:12,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:12,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:24:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:24:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:24:12,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-29 08:24:12,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27984886] [2020-10-29 08:24:12,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:24:12,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 08:24:12,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930225571] [2020-10-29 08:24:12,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 08:24:12,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:12,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 08:24:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 08:24:12,758 INFO L87 Difference]: Start difference. First operand 2778 states and 3844 transitions. Second operand 9 states. [2020-10-29 08:24:44,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:24:44,505 INFO L93 Difference]: Finished difference Result 7987 states and 11350 transitions. [2020-10-29 08:24:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 08:24:44,508 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2020-10-29 08:24:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:24:44,539 INFO L225 Difference]: With dead ends: 7987 [2020-10-29 08:24:44,540 INFO L226 Difference]: Without dead ends: 4735 [2020-10-29 08:24:44,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-10-29 08:24:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2020-10-29 08:24:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 4658. [2020-10-29 08:24:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4658 states. [2020-10-29 08:24:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 6274 transitions. [2020-10-29 08:24:44,726 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 6274 transitions. Word has length 212 [2020-10-29 08:24:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:24:44,727 INFO L481 AbstractCegarLoop]: Abstraction has 4658 states and 6274 transitions. [2020-10-29 08:24:44,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 08:24:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 6274 transitions. [2020-10-29 08:24:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-29 08:24:44,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:44,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:24:44,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:24:44,733 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:44,734 INFO L82 PathProgramCache]: Analyzing trace with hash -197926466, now seen corresponding path program 1 times [2020-10-29 08:24:44,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:44,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415163852] [2020-10-29 08:24:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:44,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:44,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:46,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:47,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:47,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:47,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-29 08:24:47,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:24:47,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2995 [2020-10-29 08:24:47,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:47,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:47,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 08:24:47,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:24:47,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 219 [2020-10-29 08:24:47,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:47,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:47,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:47,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:47,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:47,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:47,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 08:24:47,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:47,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:24:47,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:48,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:24:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:48,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:48,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:48,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:24:48,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:48,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-29 08:24:48,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:48,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:48,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:24:48,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:24:48,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:24:48,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:48,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:24:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:48,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:48,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:48,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 08:24:48,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:48,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-29 08:24:48,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:48,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:48,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:24:48,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:24:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 08:24:48,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-29 08:24:48,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415163852] [2020-10-29 08:24:48,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:24:48,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:24:48,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706422545] [2020-10-29 08:24:48,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 08:24:48,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:48,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 08:24:48,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:24:48,625 INFO L87 Difference]: Start difference. First operand 4658 states and 6274 transitions. Second operand 8 states. [2020-10-29 08:24:48,815 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:25:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:25:17,804 INFO L93 Difference]: Finished difference Result 12094 states and 16411 transitions. [2020-10-29 08:25:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:25:17,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 214 [2020-10-29 08:25:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:25:17,844 INFO L225 Difference]: With dead ends: 12094 [2020-10-29 08:25:17,844 INFO L226 Difference]: Without dead ends: 6549 [2020-10-29 08:25:17,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:25:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2020-10-29 08:25:18,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 6470. [2020-10-29 08:25:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6470 states. [2020-10-29 08:25:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6470 states to 6470 states and 8625 transitions. [2020-10-29 08:25:18,056 INFO L78 Accepts]: Start accepts. Automaton has 6470 states and 8625 transitions. Word has length 214 [2020-10-29 08:25:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:25:18,056 INFO L481 AbstractCegarLoop]: Abstraction has 6470 states and 8625 transitions. [2020-10-29 08:25:18,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 08:25:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 6470 states and 8625 transitions. [2020-10-29 08:25:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-29 08:25:18,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:18,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:25:18,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:25:18,062 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:18,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2063524568, now seen corresponding path program 1 times [2020-10-29 08:25:18,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:18,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80320833] [2020-10-29 08:25:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:18,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:18,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:19,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:19,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-29 08:25:19,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:25:19,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1144 [2020-10-29 08:25:19,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:19,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:25:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:25:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-29 08:25:19,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:19,457 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:25:19,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:19,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:19,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:19,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:19,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:19,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 08:25:19,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:19,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:25:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:25:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:19,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:25:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:19,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:19,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:19,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:25:19,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:19,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-29 08:25:19,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:19,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:19,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:19,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:19,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:25:19,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:19,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:25:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:19,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:19,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:19,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:19,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:25:19,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:25:19,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-29 08:25:19,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:19,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:19,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:19,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:19,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:25:19,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 08:25:20,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80320833] [2020-10-29 08:25:20,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:25:20,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:25:20,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893133405] [2020-10-29 08:25:20,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:25:20,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:20,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:25:20,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:25:20,018 INFO L87 Difference]: Start difference. First operand 6470 states and 8625 transitions. Second operand 5 states. [2020-10-29 08:25:20,843 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:25:39,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:25:39,527 INFO L93 Difference]: Finished difference Result 15628 states and 21748 transitions. [2020-10-29 08:25:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:25:39,532 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2020-10-29 08:25:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:25:39,582 INFO L225 Difference]: With dead ends: 15628 [2020-10-29 08:25:39,583 INFO L226 Difference]: Without dead ends: 9599 [2020-10-29 08:25:39,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:25:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9599 states. [2020-10-29 08:25:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9599 to 9135. [2020-10-29 08:25:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9135 states. [2020-10-29 08:25:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9135 states to 9135 states and 11855 transitions. [2020-10-29 08:25:39,879 INFO L78 Accepts]: Start accepts. Automaton has 9135 states and 11855 transitions. Word has length 223 [2020-10-29 08:25:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:25:39,880 INFO L481 AbstractCegarLoop]: Abstraction has 9135 states and 11855 transitions. [2020-10-29 08:25:39,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:25:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 9135 states and 11855 transitions. [2020-10-29 08:25:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-29 08:25:39,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:39,889 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:25:39,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:25:39,889 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1165975996, now seen corresponding path program 1 times [2020-10-29 08:25:39,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:39,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617562551] [2020-10-29 08:25:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:40,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:40,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:40,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:41,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:45,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:45,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-29 08:25:45,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:25:45,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-29 08:25:45,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:45,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:45,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 08:25:45,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:25:45,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 301 [2020-10-29 08:25:45,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:45,355 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:25:45,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:45,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:45,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:45,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:45,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:45,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 08:25:45,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:45,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:45,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:45,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:45,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:25:45,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:45,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:25:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:45,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:45,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:45,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:25:45,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:45,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-29 08:25:45,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:45,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:45,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:25:45,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:45,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:25:45,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:45,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:25:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:45,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:45,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:45,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:25:45,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:45,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-29 08:25:45,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:45,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:25:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:45,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:25:45,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:46,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:25:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:46,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:46,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:46,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:25:46,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:46,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-29 08:25:46,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:46,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:46,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:25:46,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:46,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:25:46,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-29 08:25:46,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617562551] [2020-10-29 08:25:46,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:25:46,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 08:25:46,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661730641] [2020-10-29 08:25:46,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 08:25:46,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:46,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 08:25:46,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 08:25:46,481 INFO L87 Difference]: Start difference. First operand 9135 states and 11855 transitions. Second operand 9 states. [2020-10-29 08:25:46,729 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:25:47,985 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:25:55,424 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-29 08:26:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:25,684 INFO L93 Difference]: Finished difference Result 25653 states and 34977 transitions. [2020-10-29 08:26:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 08:26:25,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 294 [2020-10-29 08:26:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:25,780 INFO L225 Difference]: With dead ends: 25653 [2020-10-29 08:26:25,781 INFO L226 Difference]: Without dead ends: 16075 [2020-10-29 08:26:25,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-29 08:26:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16075 states. [2020-10-29 08:26:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16075 to 12295. [2020-10-29 08:26:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12295 states. [2020-10-29 08:26:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12295 states to 12295 states and 15547 transitions. [2020-10-29 08:26:26,320 INFO L78 Accepts]: Start accepts. Automaton has 12295 states and 15547 transitions. Word has length 294 [2020-10-29 08:26:26,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:26,322 INFO L481 AbstractCegarLoop]: Abstraction has 12295 states and 15547 transitions. [2020-10-29 08:26:26,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 08:26:26,322 INFO L276 IsEmpty]: Start isEmpty. Operand 12295 states and 15547 transitions. [2020-10-29 08:26:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-29 08:26:26,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:26,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:26,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 08:26:26,333 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:26,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111261, now seen corresponding path program 1 times [2020-10-29 08:26:26,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:26,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254586266] [2020-10-29 08:26:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:26,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:26,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:26,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:27,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking...