/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/Problem13_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:35:42,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:35:42,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:35:42,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:35:42,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:35:42,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:35:42,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:35:42,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:35:42,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:35:42,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:35:42,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:35:42,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:35:42,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:35:42,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:35:42,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:35:42,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:35:42,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:35:42,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:35:42,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:35:42,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:35:42,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:35:42,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:35:42,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:35:42,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:35:42,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:35:42,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:35:42,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:35:42,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:35:42,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:35:42,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:35:42,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:35:42,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:35:42,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:35:42,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:35:42,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:35:42,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:35:42,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:35:42,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:35:42,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:35:42,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:35:42,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:35:42,170 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 [2020-10-28 12:35:42,222 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:35:42,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:35:42,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:35:42,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:35:42,224 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:35:42,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:35:42,225 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:35:42,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:35:42,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:35:42,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:35:42,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:35:42,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:35:42,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:35:42,227 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:35:42,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:35:42,227 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:35:42,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:35:42,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:35:42,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:35:42,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:35:42,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:35:42,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:35:42,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:35:42,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:35:42,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:35:42,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:35:42,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:35:42,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:35:42,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:35:42,230 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:35:42,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:35:42,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:35:42,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:35:42,731 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:35:42,733 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:35:42,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label26.c [2020-10-28 12:35:42,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/245ed1988/4bbd496bb35840cc88eebdafaf764216/FLAG772c185f9 [2020-10-28 12:35:43,863 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:35:43,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label26.c [2020-10-28 12:35:43,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/245ed1988/4bbd496bb35840cc88eebdafaf764216/FLAG772c185f9 [2020-10-28 12:35:44,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/245ed1988/4bbd496bb35840cc88eebdafaf764216 [2020-10-28 12:35:44,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:35:44,308 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:35:44,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:35:44,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:35:44,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:35:44,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:35:44" (1/1) ... [2020-10-28 12:35:44,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b1cb49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:44, skipping insertion in model container [2020-10-28 12:35:44,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:35:44" (1/1) ... [2020-10-28 12:35:44,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:35:44,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:35:46,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:35:46,151 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:35:47,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:35:47,042 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:35:47,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:47 WrapperNode [2020-10-28 12:35:47,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:35:47,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:35:47,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:35:47,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:35:47,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:47" (1/1) ... [2020-10-28 12:35:47,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:47" (1/1) ... [2020-10-28 12:35:47,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:47" (1/1) ... [2020-10-28 12:35:47,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:47" (1/1) ... [2020-10-28 12:35:47,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:47" (1/1) ... [2020-10-28 12:35:47,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:47" (1/1) ... [2020-10-28 12:35:47,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:47" (1/1) ... [2020-10-28 12:35:47,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:35:47,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:35:47,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:35:47,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:35:47,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:47" (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 [2020-10-28 12:35:47,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:35:47,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:35:47,704 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:35:47,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:35:47,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:35:47,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:35:47,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:35:47,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:35:47,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:35:47,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:35:47,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:35:47,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:35:47,705 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:35:47,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:35:47,706 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:35:47,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:35:47,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:35:47,706 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:35:47,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:35:47,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:35:47,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:35:47,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:35:47,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:35:47,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:35:47,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:35:58,241 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:35:58,241 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:35:58,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:35:58 BoogieIcfgContainer [2020-10-28 12:35:58,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:35:58,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:35:58,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:35:58,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:35:58,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:35:44" (1/3) ... [2020-10-28 12:35:58,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17672484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:35:58, skipping insertion in model container [2020-10-28 12:35:58,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:35:47" (2/3) ... [2020-10-28 12:35:58,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17672484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:35:58, skipping insertion in model container [2020-10-28 12:35:58,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:35:58" (3/3) ... [2020-10-28 12:35:58,258 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label26.c [2020-10-28 12:35:58,329 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:35:58,337 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:35:58,357 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:35:58,429 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:35:58,430 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:35:58,430 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:35:58,430 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:35:58,430 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:35:58,430 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:35:58,431 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:35:58,431 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:35:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-28 12:35:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 12:35:58,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:35:58,513 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] [2020-10-28 12:35:58,514 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:35:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:35:58,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2087975178, now seen corresponding path program 1 times [2020-10-28 12:35:58,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:35:58,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984226175] [2020-10-28 12:35:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:35:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:35:58,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:35:59,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:35:59,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 12:35:59,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:35:59,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-28 12:35:59,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:35:59,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:35:59,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:35:59,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:35:59,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 12:35:59,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 12:35:59,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:35:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:35:59,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:35:59,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:35:59,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:35:59,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:35:59,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 12:35:59,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:35:59,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:35:59,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:35:59,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:35:59,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:35:59,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:35:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:35:59,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984226175] [2020-10-28 12:35:59,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:35:59,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:35:59,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908131773] [2020-10-28 12:35:59,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:35:59,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:35:59,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:35:59,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:35:59,797 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-28 12:36:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:36:19,818 INFO L93 Difference]: Finished difference Result 3123 states and 5754 transitions. [2020-10-28 12:36:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:36:19,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 12:36:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:36:19,864 INFO L225 Difference]: With dead ends: 3123 [2020-10-28 12:36:19,864 INFO L226 Difference]: Without dead ends: 1936 [2020-10-28 12:36:19,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:36:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-28 12:36:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1918. [2020-10-28 12:36:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-28 12:36:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2936 transitions. [2020-10-28 12:36:20,083 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2936 transitions. Word has length 45 [2020-10-28 12:36:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:36:20,084 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2936 transitions. [2020-10-28 12:36:20,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:36:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2936 transitions. [2020-10-28 12:36:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 12:36:20,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:36:20,091 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:36:20,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:36:20,092 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:36:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:36:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2048771536, now seen corresponding path program 1 times [2020-10-28 12:36:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:36:20,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948281722] [2020-10-28 12:36:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:36:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:20,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:20,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:21,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:21,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 12:36:21,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:36:21,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-28 12:36:21,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:21,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:21,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:36:21,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:36:21,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 12:36:21,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 12:36:21,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:36:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:21,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:21,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:21,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:36:21,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:36:21,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 12:36:21,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:21,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:21,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:36:21,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:36:21,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:36:21,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 12:36:21,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:36:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:21,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:22,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:22,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 12:36:22,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:36:22,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-28 12:36:22,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:22,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:22,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:36:22,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:36:22,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 12:36:22,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:36:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:36:22,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948281722] [2020-10-28 12:36:22,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:36:22,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:36:22,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686789776] [2020-10-28 12:36:22,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:36:22,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:36:22,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:36:22,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:36:22,153 INFO L87 Difference]: Start difference. First operand 1918 states and 2936 transitions. Second operand 7 states. [2020-10-28 12:36:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:36:50,780 INFO L93 Difference]: Finished difference Result 5598 states and 8647 transitions. [2020-10-28 12:36:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:36:50,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-10-28 12:36:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:36:50,806 INFO L225 Difference]: With dead ends: 5598 [2020-10-28 12:36:50,806 INFO L226 Difference]: Without dead ends: 3686 [2020-10-28 12:36:50,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:36:50,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2020-10-28 12:36:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 3623. [2020-10-28 12:36:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3623 states. [2020-10-28 12:36:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 4991 transitions. [2020-10-28 12:36:50,979 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 4991 transitions. Word has length 121 [2020-10-28 12:36:50,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:36:50,980 INFO L481 AbstractCegarLoop]: Abstraction has 3623 states and 4991 transitions. [2020-10-28 12:36:50,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:36:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 4991 transitions. [2020-10-28 12:36:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 12:36:50,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:36:50,983 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:36:50,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:36:50,984 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:36:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:36:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2141850163, now seen corresponding path program 1 times [2020-10-28 12:36:50,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:36:50,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979725016] [2020-10-28 12:36:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:36:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:51,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:51,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:52,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:52,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 12:36:52,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:36:52,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-28 12:36:52,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:52,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:52,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:36:52,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:36:52,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 12:36:52,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:36:52,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:36:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:52,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:52,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:52,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:36:52,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:36:52,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 12:36:52,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:52,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:52,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:36:52,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:36:52,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:36:52,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:36:52,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:36:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:52,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:52,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:52,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 12:36:52,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:36:52,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-28 12:36:52,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:52,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:36:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:36:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-28 12:36:52,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:36:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:36:52,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979725016] [2020-10-28 12:36:52,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:36:52,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:36:52,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938065597] [2020-10-28 12:36:52,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:36:52,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:36:52,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:36:52,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:36:52,856 INFO L87 Difference]: Start difference. First operand 3623 states and 4991 transitions. Second operand 7 states. [2020-10-28 12:37:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:37:21,572 INFO L93 Difference]: Finished difference Result 10891 states and 15381 transitions. [2020-10-28 12:37:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:37:21,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-10-28 12:37:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:37:21,616 INFO L225 Difference]: With dead ends: 10891 [2020-10-28 12:37:21,616 INFO L226 Difference]: Without dead ends: 7274 [2020-10-28 12:37:21,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:37:21,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2020-10-28 12:37:21,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 7159. [2020-10-28 12:37:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7159 states. [2020-10-28 12:37:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7159 states to 7159 states and 9279 transitions. [2020-10-28 12:37:21,887 INFO L78 Accepts]: Start accepts. Automaton has 7159 states and 9279 transitions. Word has length 135 [2020-10-28 12:37:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:37:21,894 INFO L481 AbstractCegarLoop]: Abstraction has 7159 states and 9279 transitions. [2020-10-28 12:37:21,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:37:21,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7159 states and 9279 transitions. [2020-10-28 12:37:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-28 12:37:21,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:37:21,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:37:21,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:37:21,908 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:37:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:37:21,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1648662411, now seen corresponding path program 1 times [2020-10-28 12:37:21,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:37:21,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530476760] [2020-10-28 12:37:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:37:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:37:22,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:37:22,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:37:22,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:37:23,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:37:23,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 12:37:23,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:37:23,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1510 [2020-10-28 12:37:23,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:37:23,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:37:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:37:23,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:37:23,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-28 12:37:23,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:37:23,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:37:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:37:23,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:37:23,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:37:23,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:37:23,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:37:23,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 12:37:23,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:37:23,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:37:23,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:37:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:37:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:37:23,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:37:23,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:37:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:37:23,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:37:23,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:37:23,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 12:37:23,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:37:23,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-28 12:37:23,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:37:23,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:37:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:37:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:37:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 12:37:23,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:37:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:37:24,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530476760] [2020-10-28 12:37:24,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:37:24,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:37:24,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354836123] [2020-10-28 12:37:24,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:37:24,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:37:24,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:37:24,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:37:24,134 INFO L87 Difference]: Start difference. First operand 7159 states and 9279 transitions. Second operand 7 states. [2020-10-28 12:37:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:37:46,657 INFO L93 Difference]: Finished difference Result 15426 states and 19878 transitions. [2020-10-28 12:37:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 12:37:46,659 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 138 [2020-10-28 12:37:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:37:46,702 INFO L225 Difference]: With dead ends: 15426 [2020-10-28 12:37:46,702 INFO L226 Difference]: Without dead ends: 8273 [2020-10-28 12:37:46,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 12:37:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8273 states. [2020-10-28 12:37:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8273 to 8070. [2020-10-28 12:37:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8070 states. [2020-10-28 12:37:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8070 states to 8070 states and 10247 transitions. [2020-10-28 12:37:46,964 INFO L78 Accepts]: Start accepts. Automaton has 8070 states and 10247 transitions. Word has length 138 [2020-10-28 12:37:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:37:46,966 INFO L481 AbstractCegarLoop]: Abstraction has 8070 states and 10247 transitions. [2020-10-28 12:37:46,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:37:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8070 states and 10247 transitions. [2020-10-28 12:37:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 12:37:46,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:37:46,972 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:37:46,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:37:46,972 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:37:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:37:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1939873266, now seen corresponding path program 1 times [2020-10-28 12:37:46,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:37:46,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891853500] [2020-10-28 12:37:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:37:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:37:47,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:37:47,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:37:47,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:37:47,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 12:37:47,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:37:47,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-10-28 12:37:47,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:37:47,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:37:47,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:37:47,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-28 12:37:47,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 12:37:47,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:37:47,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:37:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:37:47,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:37:47,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:37:47,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:37:47,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:37:47,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 12:37:47,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:37:47,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:37:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:37:47,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:37:47,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:37:47,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:37:48,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:37:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:37:48,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:37:48,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:37:48,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 12:37:48,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:37:48,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-28 12:37:48,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:37:48,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:37:48,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:37:48,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:37:48,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:37:48,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:37:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:37:48,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891853500] [2020-10-28 12:37:48,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:37:48,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:37:48,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596122166] [2020-10-28 12:37:48,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:37:48,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:37:48,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:37:48,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:37:48,224 INFO L87 Difference]: Start difference. First operand 8070 states and 10247 transitions. Second operand 5 states. [2020-10-28 12:38:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:38:10,790 INFO L93 Difference]: Finished difference Result 21989 states and 28993 transitions. [2020-10-28 12:38:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:38:10,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-10-28 12:38:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:38:10,879 INFO L225 Difference]: With dead ends: 21989 [2020-10-28 12:38:10,879 INFO L226 Difference]: Without dead ends: 14728 [2020-10-28 12:38:10,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:38:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14728 states. [2020-10-28 12:38:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14728 to 13051. [2020-10-28 12:38:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13051 states. [2020-10-28 12:38:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13051 states to 13051 states and 17030 transitions. [2020-10-28 12:38:11,377 INFO L78 Accepts]: Start accepts. Automaton has 13051 states and 17030 transitions. Word has length 145 [2020-10-28 12:38:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:38:11,378 INFO L481 AbstractCegarLoop]: Abstraction has 13051 states and 17030 transitions. [2020-10-28 12:38:11,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:38:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 13051 states and 17030 transitions. [2020-10-28 12:38:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-28 12:38:11,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:38:11,385 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:38:11,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:38:11,386 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:38:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:38:11,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1760975366, now seen corresponding path program 1 times [2020-10-28 12:38:11,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:38:11,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773786138] [2020-10-28 12:38:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:38:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:11,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:11,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:11,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:12,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:13,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:14,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:14,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-28 12:38:14,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 12:38:14,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3450 [2020-10-28 12:38:14,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:14,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:38:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-28 12:38:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 12:38:14,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:38:15,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:38:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:15,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:15,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:15,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:38:15,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:15,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 12:38:15,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:15,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:38:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:38:15,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:38:15,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:38:15,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:38:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:15,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:15,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:15,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 12:38:15,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:15,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 12:38:15,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:15,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:15,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:38:15,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:38:15,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:38:15,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:38:15,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-28 12:38:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:15,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:15,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:15,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:15,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 12:38:15,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:38:15,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-28 12:38:15,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:15,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:38:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:38:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 12:38:15,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:38:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:38:15,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773786138] [2020-10-28 12:38:15,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:38:15,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:38:15,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484034564] [2020-10-28 12:38:15,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:38:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:38:15,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:38:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:38:15,924 INFO L87 Difference]: Start difference. First operand 13051 states and 17030 transitions. Second operand 7 states. [2020-10-28 12:38:16,078 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 12:38:18,451 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-28 12:38:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:38:46,262 INFO L93 Difference]: Finished difference Result 32193 states and 42705 transitions. [2020-10-28 12:38:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:38:46,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 265 [2020-10-28 12:38:46,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:38:46,345 INFO L225 Difference]: With dead ends: 32193 [2020-10-28 12:38:46,345 INFO L226 Difference]: Without dead ends: 19951 [2020-10-28 12:38:46,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:38:46,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19951 states. [2020-10-28 12:38:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19951 to 19773. [2020-10-28 12:38:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19773 states. [2020-10-28 12:38:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19773 states to 19773 states and 24826 transitions. [2020-10-28 12:38:46,930 INFO L78 Accepts]: Start accepts. Automaton has 19773 states and 24826 transitions. Word has length 265 [2020-10-28 12:38:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:38:46,931 INFO L481 AbstractCegarLoop]: Abstraction has 19773 states and 24826 transitions. [2020-10-28 12:38:46,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:38:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 19773 states and 24826 transitions. [2020-10-28 12:38:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-28 12:38:46,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:38:46,939 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:38:46,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:38:46,940 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:38:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:38:46,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1476655586, now seen corresponding path program 1 times [2020-10-28 12:38:46,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:38:46,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301919559] [2020-10-28 12:38:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:38:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:47,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:48,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:48,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:52,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:52,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-28 12:38:52,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:38:52,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 12:38:52,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:52,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:38:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-28 12:38:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-28 12:38:52,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:38:52,318 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:38:52,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:38:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:52,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:52,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:52,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:38:52,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:52,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:38:52,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:52,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:38:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:38:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:38:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:38:52,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:38:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:52,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:52,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:52,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 12:38:52,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:52,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 12:38:52,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:52,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:52,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:38:52,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:38:52,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:38:52,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:38:52,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-28 12:38:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:52,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:52,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:52,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:52,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 12:38:52,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:38:52,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-28 12:38:52,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:52,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:52,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:38:52,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:38:52,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 12:38:52,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:38:53,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-28 12:38:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:53,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:53,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:53,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 12:38:53,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:53,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 12:38:53,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:53,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:53,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:38:53,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:38:53,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 12:38:53,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:38:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 253 proven. 70 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 12:38:53,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301919559] [2020-10-28 12:38:53,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:38:53,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 12:38:53,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419047261] [2020-10-28 12:38:53,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 12:38:53,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:38:53,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 12:38:53,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-28 12:38:53,659 INFO L87 Difference]: Start difference. First operand 19773 states and 24826 transitions. Second operand 10 states. [2020-10-28 12:38:53,804 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:38:57,025 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 12:39:01,660 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-28 12:39:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:39:38,903 INFO L93 Difference]: Finished difference Result 57223 states and 79396 transitions. [2020-10-28 12:39:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 12:39:38,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 293 [2020-10-28 12:39:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:39:39,087 INFO L225 Difference]: With dead ends: 57223 [2020-10-28 12:39:39,087 INFO L226 Difference]: Without dead ends: 38259 [2020-10-28 12:39:39,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-10-28 12:39:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38259 states. [2020-10-28 12:39:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38259 to 37779. [2020-10-28 12:39:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37779 states. [2020-10-28 12:39:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37779 states to 37779 states and 49986 transitions. [2020-10-28 12:39:40,437 INFO L78 Accepts]: Start accepts. Automaton has 37779 states and 49986 transitions. Word has length 293 [2020-10-28 12:39:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:39:40,438 INFO L481 AbstractCegarLoop]: Abstraction has 37779 states and 49986 transitions. [2020-10-28 12:39:40,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 12:39:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 37779 states and 49986 transitions. [2020-10-28 12:39:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-28 12:39:40,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:39:40,445 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:39:40,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 12:39:40,445 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:39:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:39:40,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1946539780, now seen corresponding path program 1 times [2020-10-28 12:39:40,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:39:40,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267628477] [2020-10-28 12:39:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:39:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:39:40,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:41,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking...