/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:10:28,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:10:28,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:10:28,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:10:28,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:10:28,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:10:28,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:10:28,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:10:28,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:10:28,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:10:28,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:10:28,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:10:28,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:10:28,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:10:28,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:10:28,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:10:28,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:10:28,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:10:28,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:10:28,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:10:28,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:10:28,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:10:28,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:10:28,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:10:28,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:10:28,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:10:28,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:10:28,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:10:28,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:10:28,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:10:28,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:10:28,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:10:28,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:10:28,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:10:28,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:10:28,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:10:28,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:10:28,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:10:28,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:10:28,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:10:28,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:10:28,194 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 08:10:28,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:10:28,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:10:28,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:10:28,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:10:28,255 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:10:28,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:10:28,256 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:10:28,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:10:28,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:10:28,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:10:28,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:10:28,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:10:28,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:10:28,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:10:28,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:10:28,258 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:10:28,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:10:28,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:10:28,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:10:28,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:10:28,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:10:28,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:10:28,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:10:28,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:10:28,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:10:28,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:10:28,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:10:28,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:10:28,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:10:28,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:10:28,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:10:28,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:10:28,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:10:28,676 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:10:28,677 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:10:28,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label02.c [2020-10-29 08:10:28,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f1150b50/d5f67221fab74a2aaa63e832c6c0ec12/FLAG2e4db2386 [2020-10-29 08:10:29,811 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:10:29,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label02.c [2020-10-29 08:10:29,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f1150b50/d5f67221fab74a2aaa63e832c6c0ec12/FLAG2e4db2386 [2020-10-29 08:10:30,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f1150b50/d5f67221fab74a2aaa63e832c6c0ec12 [2020-10-29 08:10:30,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:10:30,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:10:30,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:10:30,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:10:30,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:10:30,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:10:30" (1/1) ... [2020-10-29 08:10:30,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cbd1600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:30, skipping insertion in model container [2020-10-29 08:10:30,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:10:30" (1/1) ... [2020-10-29 08:10:30,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:10:30,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:10:31,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:10:31,475 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:10:31,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:10:31,948 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:10:31,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:31 WrapperNode [2020-10-29 08:10:31,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:10:31,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:10:31,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:10:31,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:10:31,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:31" (1/1) ... [2020-10-29 08:10:31,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:31" (1/1) ... [2020-10-29 08:10:32,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:31" (1/1) ... [2020-10-29 08:10:32,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:31" (1/1) ... [2020-10-29 08:10:32,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:31" (1/1) ... [2020-10-29 08:10:32,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:31" (1/1) ... [2020-10-29 08:10:32,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:31" (1/1) ... [2020-10-29 08:10:32,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:10:32,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:10:32,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:10:32,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:10:32,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:31" (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 08:10:32,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:10:32,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:10:32,429 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:10:32,429 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:10:32,430 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:10:32,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:10:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:10:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:10:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:10:32,431 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:10:32,431 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:10:32,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:10:32,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:10:32,432 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:10:32,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:10:32,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:10:32,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:10:32,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:10:32,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:10:32,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:10:32,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:10:41,732 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:10:41,733 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:10:41,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:10:41 BoogieIcfgContainer [2020-10-29 08:10:41,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:10:41,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:10:41,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:10:41,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:10:41,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:10:30" (1/3) ... [2020-10-29 08:10:41,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6a9f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:10:41, skipping insertion in model container [2020-10-29 08:10:41,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:10:31" (2/3) ... [2020-10-29 08:10:41,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6a9f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:10:41, skipping insertion in model container [2020-10-29 08:10:41,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:10:41" (3/3) ... [2020-10-29 08:10:41,750 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label02.c [2020-10-29 08:10:41,765 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:10:41,773 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:10:41,789 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:10:41,840 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:10:41,841 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:10:41,841 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:10:41,841 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:10:41,841 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:10:41,841 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:10:41,841 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:10:41,841 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:10:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-29 08:10:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 08:10:41,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:10:41,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:10:41,910 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:10:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:10:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash 301619986, now seen corresponding path program 1 times [2020-10-29 08:10:41,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:10:41,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124470120] [2020-10-29 08:10:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:10:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:10:42,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:10:42,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:10:42,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 08:10:42,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:10:42,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-29 08:10:42,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:10:42,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:10:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:10:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:10:42,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 08:10:42,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:10:43,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:10:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:10:43,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:10:43,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:10:43,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:10:43,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:10:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 08:10:43,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:10:43,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:10:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:10:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:10:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:10:43,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:10:43,172 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 08:10:43,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124470120] [2020-10-29 08:10:43,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:10:43,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:10:43,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328674277] [2020-10-29 08:10:43,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:10:43,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:10:43,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:10:43,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:10:43,210 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-29 08:10:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:10:55,781 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-29 08:10:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:10:55,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-29 08:10:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:10:55,812 INFO L225 Difference]: With dead ends: 1694 [2020-10-29 08:10:55,812 INFO L226 Difference]: Without dead ends: 1010 [2020-10-29 08:10:55,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:10:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-29 08:10:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-29 08:10:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-29 08:10:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-29 08:10:55,973 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 60 [2020-10-29 08:10:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:10:55,975 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-29 08:10:55,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:10:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-29 08:10:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-29 08:10:55,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:10:55,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:10:55,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:10:55,997 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:10:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:10:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1413360078, now seen corresponding path program 1 times [2020-10-29 08:10:55,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:10:55,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117519133] [2020-10-29 08:10:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:10:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:10:56,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:10:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:10:56,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:10:58,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:10:58,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-29 08:10:58,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:10:58,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2374 [2020-10-29 08:10:58,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:10:58,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:10:58,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 08:10:58,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:10:58,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-29 08:10:58,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:10:58,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:10:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:10:58,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:10:58,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:10:58,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:10:58,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:10:58,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 08:10:58,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:10:58,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:10:58,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:10:58,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:10:58,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:10:58,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 08:10:58,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:10:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:10:58,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:10:58,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:10:59,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:10:59,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:10:59,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:10:59,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-29 08:10:59,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:10:59,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:10:59,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:10:59,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:10:59,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:10:59,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:10:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 08:10:59,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117519133] [2020-10-29 08:10:59,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:10:59,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:10:59,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101164886] [2020-10-29 08:10:59,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 08:10:59,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:10:59,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 08:10:59,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:10:59,237 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 6 states. [2020-10-29 08:11:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:11:13,958 INFO L93 Difference]: Finished difference Result 2449 states and 3903 transitions. [2020-10-29 08:11:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 08:11:13,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2020-10-29 08:11:13,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:11:13,971 INFO L225 Difference]: With dead ends: 2449 [2020-10-29 08:11:13,971 INFO L226 Difference]: Without dead ends: 1463 [2020-10-29 08:11:13,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:11:13,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2020-10-29 08:11:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1454. [2020-10-29 08:11:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1454 states. [2020-10-29 08:11:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 1977 transitions. [2020-10-29 08:11:14,042 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 1977 transitions. Word has length 131 [2020-10-29 08:11:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:11:14,043 INFO L481 AbstractCegarLoop]: Abstraction has 1454 states and 1977 transitions. [2020-10-29 08:11:14,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 08:11:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 1977 transitions. [2020-10-29 08:11:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-29 08:11:14,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:11:14,046 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-29 08:11:14,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:11:14,047 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:11:14,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:11:14,047 INFO L82 PathProgramCache]: Analyzing trace with hash -712958465, now seen corresponding path program 1 times [2020-10-29 08:11:14,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:11:14,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125307436] [2020-10-29 08:11:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:11:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:11:14,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:11:14,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:11:15,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:11:15,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-29 08:11:15,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:11:15,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1818 [2020-10-29 08:11:15,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:11:15,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:11:15,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:11:15,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:11:15,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-29 08:11:15,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:11:16,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:11:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:11:16,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:11:16,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:11:16,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:11:16,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:11:16,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 08:11:16,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:11:16,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:11:16,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:11:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:11:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:11:16,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:11:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:11:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:11:16,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:11:16,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:11:16,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:11:16,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:11:16,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-29 08:11:16,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:11:16,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:11:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:11:16,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:11:16,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 08:11:16,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:11:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:11:16,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125307436] [2020-10-29 08:11:16,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:11:16,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:11:16,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703860738] [2020-10-29 08:11:16,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 08:11:16,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:11:16,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 08:11:16,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:11:16,690 INFO L87 Difference]: Start difference. First operand 1454 states and 1977 transitions. Second operand 8 states. [2020-10-29 08:11:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:11:37,114 INFO L93 Difference]: Finished difference Result 3011 states and 4453 transitions. [2020-10-29 08:11:37,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:11:37,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2020-10-29 08:11:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:11:37,128 INFO L225 Difference]: With dead ends: 3011 [2020-10-29 08:11:37,129 INFO L226 Difference]: Without dead ends: 1953 [2020-10-29 08:11:37,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:11:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2020-10-29 08:11:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1926. [2020-10-29 08:11:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1926 states. [2020-10-29 08:11:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2726 transitions. [2020-10-29 08:11:37,197 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2726 transitions. Word has length 134 [2020-10-29 08:11:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:11:37,198 INFO L481 AbstractCegarLoop]: Abstraction has 1926 states and 2726 transitions. [2020-10-29 08:11:37,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 08:11:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2726 transitions. [2020-10-29 08:11:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-29 08:11:37,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:11:37,201 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:11:37,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:11:37,202 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:11:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:11:37,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2108943839, now seen corresponding path program 1 times [2020-10-29 08:11:37,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:11:37,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890999137] [2020-10-29 08:11:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:11:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:11:37,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:11:37,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:11:39,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:11:39,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-29 08:11:39,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:11:39,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2331 [2020-10-29 08:11:39,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:11:39,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:11:39,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:11:39,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:11:39,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-29 08:11:39,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:11:39,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:11:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:11:39,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:11:39,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:11:39,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:11:39,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:11:39,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 08:11:39,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:11:39,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:11:39,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:11:39,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:11:39,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:11:39,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:11:39,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:11:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:11:39,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:11:40,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:11:40,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 08:11:40,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:11:40,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-29 08:11:40,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:11:40,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:11:40,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:11:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:11:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 08:11:40,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 08:11:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:11:40,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890999137] [2020-10-29 08:11:40,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:11:40,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:11:40,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925393848] [2020-10-29 08:11:40,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:11:40,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:11:40,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:11:40,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:11:40,335 INFO L87 Difference]: Start difference. First operand 1926 states and 2726 transitions. Second operand 7 states. [2020-10-29 08:12:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:12:06,695 INFO L93 Difference]: Finished difference Result 4379 states and 6446 transitions. [2020-10-29 08:12:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:12:06,697 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 169 [2020-10-29 08:12:06,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:12:06,715 INFO L225 Difference]: With dead ends: 4379 [2020-10-29 08:12:06,715 INFO L226 Difference]: Without dead ends: 2892 [2020-10-29 08:12:06,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:12:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2020-10-29 08:12:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2831. [2020-10-29 08:12:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2831 states. [2020-10-29 08:12:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 3728 transitions. [2020-10-29 08:12:06,861 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 3728 transitions. Word has length 169 [2020-10-29 08:12:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:12:06,863 INFO L481 AbstractCegarLoop]: Abstraction has 2831 states and 3728 transitions. [2020-10-29 08:12:06,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:12:06,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 3728 transitions. [2020-10-29 08:12:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-29 08:12:06,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:12:06,868 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:12:06,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:12:06,868 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:12:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:12:06,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1904184557, now seen corresponding path program 1 times [2020-10-29 08:12:06,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:12:06,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623366115] [2020-10-29 08:12:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:12:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:06,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:07,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:08,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:08,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-29 08:12:08,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:12:08,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-29 08:12:08,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:08,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:08,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:12:08,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:12:08,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-29 08:12:08,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:12:08,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:12:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:08,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:08,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:08,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:12:08,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:12:08,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 08:12:08,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:08,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:08,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:12:08,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:12:08,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:12:08,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:12:08,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:12:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:08,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:08,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:08,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-29 08:12:08,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:12:08,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-29 08:12:08,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:08,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:08,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:12:08,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:12:08,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-29 08:12:08,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:12:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:12:08,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623366115] [2020-10-29 08:12:08,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:12:08,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:12:08,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464792908] [2020-10-29 08:12:08,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:12:08,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:12:08,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:12:08,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:12:08,990 INFO L87 Difference]: Start difference. First operand 2831 states and 3728 transitions. Second operand 7 states. [2020-10-29 08:12:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:12:27,952 INFO L93 Difference]: Finished difference Result 7113 states and 9831 transitions. [2020-10-29 08:12:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:12:27,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 175 [2020-10-29 08:12:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:12:27,977 INFO L225 Difference]: With dead ends: 7113 [2020-10-29 08:12:27,977 INFO L226 Difference]: Without dead ends: 4721 [2020-10-29 08:12:27,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:12:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2020-10-29 08:12:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 4636. [2020-10-29 08:12:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4636 states. [2020-10-29 08:12:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 5619 transitions. [2020-10-29 08:12:28,122 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 5619 transitions. Word has length 175 [2020-10-29 08:12:28,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:12:28,122 INFO L481 AbstractCegarLoop]: Abstraction has 4636 states and 5619 transitions. [2020-10-29 08:12:28,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:12:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 5619 transitions. [2020-10-29 08:12:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-29 08:12:28,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:12:28,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 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 08:12:28,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:12:28,128 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:12:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:12:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2081326870, now seen corresponding path program 1 times [2020-10-29 08:12:28,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:12:28,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591500790] [2020-10-29 08:12:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:12:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:28,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:28,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:29,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:29,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-29 08:12:29,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:12:29,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-29 08:12:29,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:29,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:12:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:12:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:12:29,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:12:29,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:12:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:29,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:29,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:29,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:12:29,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:12:29,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 08:12:29,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:29,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:12:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:12:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:12:29,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:12:29,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:12:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:29,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:29,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:29,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:12:29,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:12:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-29 08:12:29,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:29,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:12:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:12:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:12:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:12:29,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:12:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:29,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:29,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:29,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 08:12:29,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:12:29,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-29 08:12:29,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:29,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:29,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:12:29,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:12:29,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 08:12:29,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:12:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:12:29,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591500790] [2020-10-29 08:12:29,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:12:29,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:12:29,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167768575] [2020-10-29 08:12:29,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:12:29,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:12:29,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:12:29,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:12:29,660 INFO L87 Difference]: Start difference. First operand 4636 states and 5619 transitions. Second operand 7 states. [2020-10-29 08:12:52,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:12:52,676 INFO L93 Difference]: Finished difference Result 11153 states and 14182 transitions. [2020-10-29 08:12:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:12:52,680 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 216 [2020-10-29 08:12:52,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:12:52,719 INFO L225 Difference]: With dead ends: 11153 [2020-10-29 08:12:52,719 INFO L226 Difference]: Without dead ends: 6956 [2020-10-29 08:12:52,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:12:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6956 states. [2020-10-29 08:12:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6956 to 6474. [2020-10-29 08:12:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6474 states. [2020-10-29 08:12:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6474 states to 6474 states and 8073 transitions. [2020-10-29 08:12:52,924 INFO L78 Accepts]: Start accepts. Automaton has 6474 states and 8073 transitions. Word has length 216 [2020-10-29 08:12:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:12:52,925 INFO L481 AbstractCegarLoop]: Abstraction has 6474 states and 8073 transitions. [2020-10-29 08:12:52,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:12:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 6474 states and 8073 transitions. [2020-10-29 08:12:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-29 08:12:52,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:12:52,930 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 08:12:52,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:12:52,931 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:12:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:12:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1234777834, now seen corresponding path program 1 times [2020-10-29 08:12:52,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:12:52,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942908313] [2020-10-29 08:12:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:12:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:53,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:53,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:54,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:57,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:57,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-29 08:12:57,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:12:57,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4300 [2020-10-29 08:12:57,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:57,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:12:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:12:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-29 08:12:57,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:12:57,516 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:12:57,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:12:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:57,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:57,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:57,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:12:57,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:12:57,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 08:12:57,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:57,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:57,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:12:57,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:12:57,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:12:57,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:12:57,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:12:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:57,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:57,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:57,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:12:57,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:12:57,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-29 08:12:57,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:57,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:57,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:12:57,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:12:57,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:12:57,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:12:57,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:12:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:12:58,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:12:58,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:12:58,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:12:58,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:12:58,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-29 08:12:58,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:12:58,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:12:58,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:12:58,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:12:58,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:12:58,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:12:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 173 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:12:58,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942908313] [2020-10-29 08:12:58,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:12:58,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 08:12:58,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890943219] [2020-10-29 08:12:58,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:12:58,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:12:58,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:12:58,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:12:58,413 INFO L87 Difference]: Start difference. First operand 6474 states and 8073 transitions. Second operand 10 states. [2020-10-29 08:12:58,683 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 08:13:03,705 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-29 08:13:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:13:24,752 INFO L93 Difference]: Finished difference Result 15924 states and 20674 transitions. [2020-10-29 08:13:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 08:13:24,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 222 [2020-10-29 08:13:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:13:24,809 INFO L225 Difference]: With dead ends: 15924 [2020-10-29 08:13:24,809 INFO L226 Difference]: Without dead ends: 9889 [2020-10-29 08:13:24,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-29 08:13:24,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9889 states. [2020-10-29 08:13:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9889 to 9714. [2020-10-29 08:13:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9714 states. [2020-10-29 08:13:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9714 states to 9714 states and 11778 transitions. [2020-10-29 08:13:25,192 INFO L78 Accepts]: Start accepts. Automaton has 9714 states and 11778 transitions. Word has length 222 [2020-10-29 08:13:25,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:13:25,193 INFO L481 AbstractCegarLoop]: Abstraction has 9714 states and 11778 transitions. [2020-10-29 08:13:25,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:13:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 9714 states and 11778 transitions. [2020-10-29 08:13:25,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-29 08:13:25,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:13:25,199 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:13:25,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:13:25,199 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:13:25,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:13:25,200 INFO L82 PathProgramCache]: Analyzing trace with hash -650886624, now seen corresponding path program 1 times [2020-10-29 08:13:25,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:13:25,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864306676] [2020-10-29 08:13:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:13:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:13:25,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:25,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:25,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:30,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:13:30,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-29 08:13:30,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:13:30,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 08:13:30,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:13:30,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:13:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:13:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:13:30,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-29 08:13:30,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:13:30,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:13:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:13:30,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:30,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:13:30,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:13:30,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:13:30,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 08:13:30,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:13:30,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:13:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:13:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:13:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:13:30,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:13:30,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:13:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:13:30,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:30,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:13:30,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:13:30,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:13:30,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-29 08:13:30,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:13:30,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:13:30,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:13:30,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:13:30,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:13:30,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:13:30,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:13:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:13:30,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:30,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:30,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:13:30,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:13:30,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:13:30,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-29 08:13:30,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:13:30,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:13:30,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:13:30,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:13:30,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:13:30,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:13:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 08:13:30,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864306676] [2020-10-29 08:13:30,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:13:30,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:13:30,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557233399] [2020-10-29 08:13:30,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:13:30,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:13:30,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:13:30,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:13:30,974 INFO L87 Difference]: Start difference. First operand 9714 states and 11778 transitions. Second operand 5 states. [2020-10-29 08:13:31,769 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:13:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:13:51,571 INFO L93 Difference]: Finished difference Result 19439 states and 24040 transitions. [2020-10-29 08:13:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:13:51,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2020-10-29 08:13:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:13:51,614 INFO L225 Difference]: With dead ends: 19439 [2020-10-29 08:13:51,615 INFO L226 Difference]: Without dead ends: 10166 [2020-10-29 08:13:51,637 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 08:13:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10166 states. [2020-10-29 08:13:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10166 to 10152. [2020-10-29 08:13:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10152 states. [2020-10-29 08:13:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10152 states to 10152 states and 12595 transitions. [2020-10-29 08:13:51,891 INFO L78 Accepts]: Start accepts. Automaton has 10152 states and 12595 transitions. Word has length 233 [2020-10-29 08:13:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:13:51,892 INFO L481 AbstractCegarLoop]: Abstraction has 10152 states and 12595 transitions. [2020-10-29 08:13:51,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:13:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 10152 states and 12595 transitions. [2020-10-29 08:13:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-29 08:13:51,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:13:51,901 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 08:13:51,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 08:13:51,902 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:13:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:13:51,903 INFO L82 PathProgramCache]: Analyzing trace with hash -743181468, now seen corresponding path program 1 times [2020-10-29 08:13:51,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:13:51,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879790098] [2020-10-29 08:13:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:13:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:13:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:52,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:54,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:13:54,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-29 08:13:54,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:13:54,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2133 [2020-10-29 08:13:54,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:13:54,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:13:54,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:13:54,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-29 08:13:54,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:13:54,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:13:54,369 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:13:54,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:13:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:13:54,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:54,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:13:54,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:13:54,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:13:54,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 08:13:54,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:13:54,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:13:54,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:13:54,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:13:54,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:13:54,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:13:54,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:13:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:13:54,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:54,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:13:54,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:13:54,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:13:54,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 08:13:54,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:13:54,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:13:54,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:13:54,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:13:54,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:13:54,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:13:54,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:13:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:13:54,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:54,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:13:54,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:13:54,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:13:54,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-29 08:13:54,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:13:54,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:13:54,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:13:54,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:13:54,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:13:54,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:13:54,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:13:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:13:54,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:13:54,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:13:54,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:13:54,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:13:54,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-29 08:13:54,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:13:54,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:13:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:13:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:13:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:13:54,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:13:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 297 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-29 08:13:55,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879790098] [2020-10-29 08:13:55,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:13:55,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:13:55,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675527592] [2020-10-29 08:13:55,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:13:55,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:13:55,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:13:55,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:13:55,099 INFO L87 Difference]: Start difference. First operand 10152 states and 12595 transitions. Second operand 7 states. [2020-10-29 08:13:56,341 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:14:10,288 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68