/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/Problem03_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:11:52,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:11:52,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:11:53,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:11:53,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:11:53,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:11:53,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:11:53,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:11:53,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:11:53,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:11:53,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:11:53,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:11:53,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:11:53,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:11:53,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:11:53,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:11:53,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:11:53,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:11:53,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:11:53,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:11:53,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:11:53,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:11:53,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:11:53,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:11:53,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:11:53,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:11:53,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:11:53,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:11:53,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:11:53,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:11:53,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:11:53,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:11:53,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:11:53,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:11:53,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:11:53,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:11:53,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:11:53,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:11:53,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:11:53,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:11:53,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:11:53,132 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 10:11:53,187 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:11:53,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:11:53,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:11:53,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:11:53,193 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:11:53,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:11:53,194 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:11:53,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:11:53,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:11:53,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:11:53,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:11:53,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:11:53,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:11:53,196 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:11:53,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:11:53,197 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:11:53,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:11:53,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:11:53,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:11:53,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:11:53,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:11:53,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:11:53,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:11:53,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:11:53,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:11:53,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:11:53,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:11:53,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:11:53,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:11:53,201 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:11:53,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:11:53,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:11:53,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:11:53,713 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:11:53,713 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:11:53,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label03.c [2020-10-28 10:11:53,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911022187/b436c0b0bc774df3a61a2fb2c30862ab/FLAG53751ee68 [2020-10-28 10:11:54,720 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:11:54,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label03.c [2020-10-28 10:11:54,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911022187/b436c0b0bc774df3a61a2fb2c30862ab/FLAG53751ee68 [2020-10-28 10:11:54,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911022187/b436c0b0bc774df3a61a2fb2c30862ab [2020-10-28 10:11:54,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:11:54,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:11:54,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:11:54,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:11:54,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:11:54,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:11:54" (1/1) ... [2020-10-28 10:11:54,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@522b80ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:54, skipping insertion in model container [2020-10-28 10:11:54,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:11:54" (1/1) ... [2020-10-28 10:11:54,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:11:54,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:11:55,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:11:55,711 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:11:55,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:11:55,984 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:11:55,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:55 WrapperNode [2020-10-28 10:11:55,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:11:55,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:11:55,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:11:55,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:11:56,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:55" (1/1) ... [2020-10-28 10:11:56,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:55" (1/1) ... [2020-10-28 10:11:56,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:55" (1/1) ... [2020-10-28 10:11:56,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:55" (1/1) ... [2020-10-28 10:11:56,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:55" (1/1) ... [2020-10-28 10:11:56,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:55" (1/1) ... [2020-10-28 10:11:56,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:55" (1/1) ... [2020-10-28 10:11:56,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:11:56,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:11:56,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:11:56,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:11:56,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:55" (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 10:11:56,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:11:56,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:11:56,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:11:56,276 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:11:56,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:11:56,277 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:11:56,277 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:11:56,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:11:56,277 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:11:56,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:11:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:11:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:11:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:11:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:11:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:11:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:11:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:11:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:11:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:11:58,141 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:11:58,141 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:11:58,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:11:58 BoogieIcfgContainer [2020-10-28 10:11:58,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:11:58,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:11:58,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:11:58,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:11:58,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:11:54" (1/3) ... [2020-10-28 10:11:58,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c424dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:11:58, skipping insertion in model container [2020-10-28 10:11:58,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:11:55" (2/3) ... [2020-10-28 10:11:58,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c424dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:11:58, skipping insertion in model container [2020-10-28 10:11:58,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:11:58" (3/3) ... [2020-10-28 10:11:58,153 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label03.c [2020-10-28 10:11:58,166 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:11:58,171 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:11:58,185 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:11:58,215 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:11:58,215 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:11:58,215 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:11:58,216 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:11:58,216 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:11:58,216 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:11:58,216 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:11:58,216 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:11:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-28 10:11:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-28 10:11:58,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:11:58,259 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:58,259 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:11:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:11:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1454632148, now seen corresponding path program 1 times [2020-10-28 10:11:58,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:11:58,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375665524] [2020-10-28 10:11:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:11:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:11:58,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:11:59,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:03,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:03,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-28 10:12:03,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:03,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4986 [2020-10-28 10:12:03,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:03,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:03,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:12:03,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:12:03,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-28 10:12:03,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:12:04,181 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:04,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:04,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:04,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:04,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:04,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:04,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 10:12:04,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:04,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:12:04,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:04,331 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 10:12:04,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375665524] [2020-10-28 10:12:04,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:12:04,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:12:04,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904485128] [2020-10-28 10:12:04,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:12:04,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:04,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:12:04,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:12:04,362 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-28 10:12:04,593 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:07,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:07,975 INFO L93 Difference]: Finished difference Result 889 states and 1542 transitions. [2020-10-28 10:12:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:07,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-10-28 10:12:07,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:08,014 INFO L225 Difference]: With dead ends: 889 [2020-10-28 10:12:08,017 INFO L226 Difference]: Without dead ends: 481 [2020-10-28 10:12:08,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:08,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-28 10:12:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 476. [2020-10-28 10:12:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-28 10:12:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 729 transitions. [2020-10-28 10:12:08,189 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 729 transitions. Word has length 171 [2020-10-28 10:12:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:08,190 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 729 transitions. [2020-10-28 10:12:08,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:12:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 729 transitions. [2020-10-28 10:12:08,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-28 10:12:08,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:08,198 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:08,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:12:08,199 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:08,200 INFO L82 PathProgramCache]: Analyzing trace with hash -744610301, now seen corresponding path program 1 times [2020-10-28 10:12:08,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:08,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863928256] [2020-10-28 10:12:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:08,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:10,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:12,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:12,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-28 10:12:12,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:12:12,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4268 [2020-10-28 10:12:12,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:12,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 10:12:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 10:12:12,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:12:12,908 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:12,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:12,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:12,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:12,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:12,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:12,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:12:12,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:12,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:12,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:12,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:12,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:12,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:13,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:13,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:13,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:13,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:12:13,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:13,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 10:12:13,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:13,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:13,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:13,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:13,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:12:13,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:13,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863928256] [2020-10-28 10:12:13,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:13,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:12:13,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026498443] [2020-10-28 10:12:13,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:12:13,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:13,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:12:13,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:13,148 INFO L87 Difference]: Start difference. First operand 476 states and 729 transitions. Second operand 6 states. [2020-10-28 10:12:13,466 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:14,324 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:12:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:17,725 INFO L93 Difference]: Finished difference Result 1833 states and 2877 transitions. [2020-10-28 10:12:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:12:17,725 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2020-10-28 10:12:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:17,743 INFO L225 Difference]: With dead ends: 1833 [2020-10-28 10:12:17,743 INFO L226 Difference]: Without dead ends: 1363 [2020-10-28 10:12:17,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:12:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2020-10-28 10:12:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1323. [2020-10-28 10:12:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1323 states. [2020-10-28 10:12:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 2007 transitions. [2020-10-28 10:12:17,866 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 2007 transitions. Word has length 180 [2020-10-28 10:12:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:17,868 INFO L481 AbstractCegarLoop]: Abstraction has 1323 states and 2007 transitions. [2020-10-28 10:12:17,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:12:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 2007 transitions. [2020-10-28 10:12:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-28 10:12:17,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:17,883 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:17,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:12:17,884 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:17,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1528349419, now seen corresponding path program 1 times [2020-10-28 10:12:17,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:17,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472692022] [2020-10-28 10:12:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:17,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:18,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:20,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:20,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-28 10:12:20,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:20,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2292 [2020-10-28 10:12:20,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:20,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:20,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:20,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:12:20,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 10:12:20,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:12:20,607 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:20,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:20,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:20,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:20,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:20,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:20,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:12:20,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:20,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:20,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:20,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:20,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:20,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:20,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:20,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:20,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:20,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:12:20,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:20,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 10:12:20,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:20,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:20,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:20,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:20,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:12:20,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:20,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472692022] [2020-10-28 10:12:20,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:20,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:20,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507208859] [2020-10-28 10:12:20,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:20,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:20,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:20,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:20,917 INFO L87 Difference]: Start difference. First operand 1323 states and 2007 transitions. Second operand 5 states. [2020-10-28 10:12:21,236 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:24,303 INFO L93 Difference]: Finished difference Result 3909 states and 6045 transitions. [2020-10-28 10:12:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:24,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2020-10-28 10:12:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:24,325 INFO L225 Difference]: With dead ends: 3909 [2020-10-28 10:12:24,326 INFO L226 Difference]: Without dead ends: 2592 [2020-10-28 10:12:24,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:24,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2020-10-28 10:12:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2581. [2020-10-28 10:12:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2581 states. [2020-10-28 10:12:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 3820 transitions. [2020-10-28 10:12:24,465 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 3820 transitions. Word has length 183 [2020-10-28 10:12:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:24,466 INFO L481 AbstractCegarLoop]: Abstraction has 2581 states and 3820 transitions. [2020-10-28 10:12:24,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 3820 transitions. [2020-10-28 10:12:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-28 10:12:24,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:24,475 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:24,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:12:24,475 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash 268810967, now seen corresponding path program 1 times [2020-10-28 10:12:24,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:24,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314694237] [2020-10-28 10:12:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:24,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:24,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:24,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:25,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:25,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:27,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:28,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:29,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:29,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-28 10:12:29,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 10:12:29,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 10:12:29,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:29,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:12:29,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-28 10:12:29,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:29,926 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:29,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:29,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:29,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:29,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:29,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:29,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:12:29,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:29,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:29,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:29,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:29,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:29,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:30,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:30,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:30,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:30,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:12:30,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:30,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:12:30,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:30,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:30,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:30,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:30,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:30,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:30,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 10:12:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:30,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:30,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:30,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:30,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:12:30,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:30,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 10:12:30,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:30,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:12:30,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:12:30,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314694237] [2020-10-28 10:12:30,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:30,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:30,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016120644] [2020-10-28 10:12:30,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:30,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:30,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:30,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:30,189 INFO L87 Difference]: Start difference. First operand 2581 states and 3820 transitions. Second operand 5 states. [2020-10-28 10:12:30,610 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:12:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:33,515 INFO L93 Difference]: Finished difference Result 6838 states and 10196 transitions. [2020-10-28 10:12:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:33,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2020-10-28 10:12:33,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:33,535 INFO L225 Difference]: With dead ends: 6838 [2020-10-28 10:12:33,535 INFO L226 Difference]: Without dead ends: 2584 [2020-10-28 10:12:33,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2020-10-28 10:12:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2580. [2020-10-28 10:12:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2580 states. [2020-10-28 10:12:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 3818 transitions. [2020-10-28 10:12:33,651 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 3818 transitions. Word has length 190 [2020-10-28 10:12:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:33,652 INFO L481 AbstractCegarLoop]: Abstraction has 2580 states and 3818 transitions. [2020-10-28 10:12:33,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 3818 transitions. [2020-10-28 10:12:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-28 10:12:33,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:33,660 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:33,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:12:33,660 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:33,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:33,661 INFO L82 PathProgramCache]: Analyzing trace with hash 783823575, now seen corresponding path program 1 times [2020-10-28 10:12:33,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:33,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81865526] [2020-10-28 10:12:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:33,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:34,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:35,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:35,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:35,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-28 10:12:35,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:12:35,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2212 [2020-10-28 10:12:35,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:35,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:35,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:35,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:12:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 10:12:35,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:36,203 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:36,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:36,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:36,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:36,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:36,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:36,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:12:36,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:36,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:36,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:36,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:36,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:36,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:12:36,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:36,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:36,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:36,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:12:36,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:36,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 10:12:36,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:36,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:36,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:36,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:36,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:12:36,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:36,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81865526] [2020-10-28 10:12:36,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:36,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:36,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302035857] [2020-10-28 10:12:36,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:36,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:36,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:36,456 INFO L87 Difference]: Start difference. First operand 2580 states and 3818 transitions. Second operand 5 states. [2020-10-28 10:12:36,784 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:39,980 INFO L93 Difference]: Finished difference Result 7460 states and 11317 transitions. [2020-10-28 10:12:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:39,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2020-10-28 10:12:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:40,014 INFO L225 Difference]: With dead ends: 7460 [2020-10-28 10:12:40,015 INFO L226 Difference]: Without dead ends: 4886 [2020-10-28 10:12:40,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2020-10-28 10:12:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 4879. [2020-10-28 10:12:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4879 states. [2020-10-28 10:12:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 7234 transitions. [2020-10-28 10:12:40,202 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 7234 transitions. Word has length 190 [2020-10-28 10:12:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:40,203 INFO L481 AbstractCegarLoop]: Abstraction has 4879 states and 7234 transitions. [2020-10-28 10:12:40,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 7234 transitions. [2020-10-28 10:12:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-28 10:12:40,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:40,219 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:40,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:12:40,219 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash 935560684, now seen corresponding path program 1 times [2020-10-28 10:12:40,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:40,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274316999] [2020-10-28 10:12:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:40,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:42,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:42,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:43,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:43,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:45,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:45,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 10:12:45,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:12:45,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 10:12:45,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:45,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:45,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 10:12:45,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:12:45,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-28 10:12:45,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:45,692 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:45,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:45,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:45,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:45,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:45,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:45,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:12:45,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:45,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:45,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:45,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:45,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:12:45,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:45,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:45,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:45,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:45,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:45,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:12:45,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:45,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:12:45,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:45,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:12:45,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:45,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 10:12:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:45,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:45,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:45,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 10:12:45,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:45,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-28 10:12:45,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:45,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:45,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 10:12:45,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:45,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:12:45,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 10:12:46,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274316999] [2020-10-28 10:12:46,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:46,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:12:46,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679393665] [2020-10-28 10:12:46,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:12:46,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:46,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:12:46,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:12:46,446 INFO L87 Difference]: Start difference. First operand 4879 states and 7234 transitions. Second operand 7 states. [2020-10-28 10:12:46,636 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:47,356 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 10:12:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:49,880 INFO L93 Difference]: Finished difference Result 10066 states and 15093 transitions. [2020-10-28 10:12:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:12:49,881 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2020-10-28 10:12:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:49,912 INFO L225 Difference]: With dead ends: 10066 [2020-10-28 10:12:49,912 INFO L226 Difference]: Without dead ends: 5151 [2020-10-28 10:12:49,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 10:12:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2020-10-28 10:12:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 5147. [2020-10-28 10:12:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5147 states. [2020-10-28 10:12:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5147 states to 5147 states and 7527 transitions. [2020-10-28 10:12:50,119 INFO L78 Accepts]: Start accepts. Automaton has 5147 states and 7527 transitions. Word has length 217 [2020-10-28 10:12:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:50,120 INFO L481 AbstractCegarLoop]: Abstraction has 5147 states and 7527 transitions. [2020-10-28 10:12:50,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:12:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 5147 states and 7527 transitions. [2020-10-28 10:12:50,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-28 10:12:50,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:50,139 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:50,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:12:50,140 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:50,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:50,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1648998247, now seen corresponding path program 1 times [2020-10-28 10:12:50,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:50,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409709781] [2020-10-28 10:12:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:50,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:50,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:52,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:52,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-28 10:12:52,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:52,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2104 [2020-10-28 10:12:52,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:52,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:52,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 10:12:52,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:12:52,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 10:12:52,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:52,512 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:52,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:52,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:52,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:52,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:52,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:52,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:12:52,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:52,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:52,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:52,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:52,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:12:52,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:52,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:52,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:52,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:52,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:12:52,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:52,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 10:12:52,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:52,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:12:52,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 10:12:52,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:52,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:12:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:52,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:52,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:52,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:12:52,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:52,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-28 10:12:52,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:52,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:12:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:12:52,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 10:12:53,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409709781] [2020-10-28 10:12:53,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:53,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:12:53,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412621538] [2020-10-28 10:12:53,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:12:53,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:53,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:12:53,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:12:53,151 INFO L87 Difference]: Start difference. First operand 5147 states and 7527 transitions. Second operand 8 states. [2020-10-28 10:12:53,346 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:12:56,463 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 10:12:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:57,635 INFO L93 Difference]: Finished difference Result 15102 states and 25370 transitions. [2020-10-28 10:12:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 10:12:57,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 222 [2020-10-28 10:12:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:57,727 INFO L225 Difference]: With dead ends: 15102 [2020-10-28 10:12:57,728 INFO L226 Difference]: Without dead ends: 9961 [2020-10-28 10:12:57,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-28 10:12:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2020-10-28 10:12:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 9464. [2020-10-28 10:12:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9464 states. [2020-10-28 10:12:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9464 states to 9464 states and 14277 transitions. [2020-10-28 10:12:58,215 INFO L78 Accepts]: Start accepts. Automaton has 9464 states and 14277 transitions. Word has length 222 [2020-10-28 10:12:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:58,216 INFO L481 AbstractCegarLoop]: Abstraction has 9464 states and 14277 transitions. [2020-10-28 10:12:58,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:12:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 9464 states and 14277 transitions. [2020-10-28 10:12:58,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-28 10:12:58,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:58,250 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:58,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:12:58,250 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:58,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:58,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1898660554, now seen corresponding path program 1 times [2020-10-28 10:12:58,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:58,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970313684] [2020-10-28 10:12:58,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:58,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:58,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:58,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:02,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:02,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-28 10:13:02,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:13:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4550 [2020-10-28 10:13:02,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:02,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:02,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 10:13:02,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:13:02,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 10:13:02,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:03,066 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:03,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:03,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:03,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:03,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:03,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:03,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:13:03,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:03,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:03,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:03,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:03,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:13:03,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:03,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:03,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:03,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:03,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:03,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:13:03,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:13:03,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 10:13:03,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:03,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:03,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:03,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:03,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:13:03,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:03,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 10:13:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:03,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:03,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:03,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:13:03,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:03,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 10:13:03,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:03,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:03,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:03,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 10:13:03,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:03,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 10:13:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:03,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:03,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:03,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:13:03,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:03,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 10:13:03,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:03,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:03,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:03,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:13:03,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:03,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 57 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 10:13:03,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970313684] [2020-10-28 10:13:03,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:03,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:13:03,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90561000] [2020-10-28 10:13:03,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:13:03,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:13:03,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:13:03,576 INFO L87 Difference]: Start difference. First operand 9464 states and 14277 transitions. Second operand 8 states. [2020-10-28 10:13:03,771 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 10:13:05,142 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:07,264 INFO L93 Difference]: Finished difference Result 25597 states and 42343 transitions. [2020-10-28 10:13:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 10:13:07,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 232 [2020-10-28 10:13:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:07,393 INFO L225 Difference]: With dead ends: 25597 [2020-10-28 10:13:07,393 INFO L226 Difference]: Without dead ends: 16139 [2020-10-28 10:13:07,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:13:07,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2020-10-28 10:13:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 15974. [2020-10-28 10:13:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15974 states. [2020-10-28 10:13:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15974 states to 15974 states and 24481 transitions. [2020-10-28 10:13:08,124 INFO L78 Accepts]: Start accepts. Automaton has 15974 states and 24481 transitions. Word has length 232 [2020-10-28 10:13:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:08,125 INFO L481 AbstractCegarLoop]: Abstraction has 15974 states and 24481 transitions. [2020-10-28 10:13:08,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:13:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 15974 states and 24481 transitions. [2020-10-28 10:13:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-28 10:13:08,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:08,178 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:08,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:13:08,179 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:08,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:08,179 INFO L82 PathProgramCache]: Analyzing trace with hash 629554798, now seen corresponding path program 1 times [2020-10-28 10:13:08,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:08,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336120786] [2020-10-28 10:13:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:08,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:08,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:08,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:12,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:13,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:13,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-28 10:13:13,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:13,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 10:13:13,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:13,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:13:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 10:13:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 203 [2020-10-28 10:13:13,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:13,548 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:13,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:13,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:13,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:13,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:13,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:13,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:13:13,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:13,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:13,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:13,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:13,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:13,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:13,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:13,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:13,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:13,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:13,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:13:13,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:13,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:13,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:13,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:13,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:13,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:13,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 10:13:13,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:13,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 10:13:13,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:13,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:13,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:13:13,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:13,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:13:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:13,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:13,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:13,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:13:13,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:13,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-28 10:13:13,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:13,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:13,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:13,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:13:13,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 85 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 10:13:14,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336120786] [2020-10-28 10:13:14,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:14,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:13:14,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39716397] [2020-10-28 10:13:14,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:13:14,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:13:14,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:14,002 INFO L87 Difference]: Start difference. First operand 15974 states and 24481 transitions. Second operand 6 states. [2020-10-28 10:13:14,199 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:13:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:16,989 INFO L93 Difference]: Finished difference Result 37007 states and 57631 transitions. [2020-10-28 10:13:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 10:13:16,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 238 [2020-10-28 10:13:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:17,088 INFO L225 Difference]: With dead ends: 37007 [2020-10-28 10:13:17,088 INFO L226 Difference]: Without dead ends: 21039 [2020-10-28 10:13:17,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21039 states. [2020-10-28 10:13:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21039 to 21019. [2020-10-28 10:13:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21019 states. [2020-10-28 10:13:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21019 states to 21019 states and 31926 transitions. [2020-10-28 10:13:17,819 INFO L78 Accepts]: Start accepts. Automaton has 21019 states and 31926 transitions. Word has length 238 [2020-10-28 10:13:17,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:17,819 INFO L481 AbstractCegarLoop]: Abstraction has 21019 states and 31926 transitions. [2020-10-28 10:13:17,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:13:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 21019 states and 31926 transitions. [2020-10-28 10:13:17,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-28 10:13:17,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:17,897 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:17,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:13:17,897 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:17,898 INFO L82 PathProgramCache]: Analyzing trace with hash -877260356, now seen corresponding path program 1 times [2020-10-28 10:13:17,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:17,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702744330] [2020-10-28 10:13:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:18,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:18,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:18,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:19,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:20,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:22,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:22,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-28 10:13:22,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 10:13:22,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 10:13:22,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:22,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:13:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:13:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 10:13:22,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:23,258 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:23,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:23,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:23,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:23,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:23,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:23,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:13:23,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:23,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:23,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:23,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:23,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:23,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:23,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:23,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:23,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:23,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:23,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:23,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:13:23,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:23,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:23,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:23,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:23,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:13:23,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:23,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:23,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:23,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:23,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:13:23,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:23,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 10:13:23,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:23,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:23,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:23,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:23,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 10:13:23,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:23,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 10:13:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:23,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:23,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:23,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:13:23,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:23,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-28 10:13:23,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:23,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:23,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:23,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:23,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:13:23,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 10:13:23,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702744330] [2020-10-28 10:13:23,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:23,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:13:23,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663329177] [2020-10-28 10:13:23,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:23,696 INFO L87 Difference]: Start difference. First operand 21019 states and 31926 transitions. Second operand 7 states. [2020-10-28 10:13:24,001 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:13:24,195 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:13:29,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:29,377 INFO L93 Difference]: Finished difference Result 55940 states and 96691 transitions. [2020-10-28 10:13:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:13:29,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-10-28 10:13:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:29,686 INFO L225 Difference]: With dead ends: 55940 [2020-10-28 10:13:29,686 INFO L226 Difference]: Without dead ends: 34927 [2020-10-28 10:13:29,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:13:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34927 states. [2020-10-28 10:13:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34927 to 33574. [2020-10-28 10:13:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33574 states. [2020-10-28 10:13:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33574 states to 33574 states and 49679 transitions. [2020-10-28 10:13:31,630 INFO L78 Accepts]: Start accepts. Automaton has 33574 states and 49679 transitions. Word has length 239 [2020-10-28 10:13:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:31,631 INFO L481 AbstractCegarLoop]: Abstraction has 33574 states and 49679 transitions. [2020-10-28 10:13:31,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:13:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 33574 states and 49679 transitions. [2020-10-28 10:13:31,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-28 10:13:31,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:31,744 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:31,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 10:13:31,744 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1590015021, now seen corresponding path program 1 times [2020-10-28 10:13:31,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:31,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110505884] [2020-10-28 10:13:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:31,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:33,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:33,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-28 10:13:33,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:33,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-28 10:13:33,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:33,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:33,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:13:33,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:13:33,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 10:13:33,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:33,267 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:33,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:33,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:33,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:33,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:33,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:33,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:13:33,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:33,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:33,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:33,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:33,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:13:33,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:33,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:33,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:33,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:33,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 10:13:33,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:33,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-28 10:13:33,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:33,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:33,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:33,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:33,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 10:13:33,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:13:33,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110505884] [2020-10-28 10:13:33,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:13:33,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:13:33,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887796578] [2020-10-28 10:13:33,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:33,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:33,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:33,681 INFO L87 Difference]: Start difference. First operand 33574 states and 49679 transitions. Second operand 7 states. [2020-10-28 10:13:33,884 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:34,191 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:13:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:37,259 INFO L93 Difference]: Finished difference Result 75397 states and 112694 transitions. [2020-10-28 10:13:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:13:37,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-10-28 10:13:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:37,445 INFO L225 Difference]: With dead ends: 75397 [2020-10-28 10:13:37,445 INFO L226 Difference]: Without dead ends: 41829 [2020-10-28 10:13:37,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:13:37,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41829 states. [2020-10-28 10:13:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41829 to 40945. [2020-10-28 10:13:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40945 states. [2020-10-28 10:13:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40945 states to 40945 states and 56062 transitions. [2020-10-28 10:13:39,178 INFO L78 Accepts]: Start accepts. Automaton has 40945 states and 56062 transitions. Word has length 239 [2020-10-28 10:13:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:39,179 INFO L481 AbstractCegarLoop]: Abstraction has 40945 states and 56062 transitions. [2020-10-28 10:13:39,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:13:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 40945 states and 56062 transitions. [2020-10-28 10:13:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-28 10:13:39,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:39,247 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:39,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 10:13:39,247 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1317352704, now seen corresponding path program 1 times [2020-10-28 10:13:39,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:39,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679520392] [2020-10-28 10:13:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:39,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:39,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:41,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:43,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:44,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:44,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-28 10:13:44,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:44,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 10:13:44,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:44,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-28 10:13:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 10:13:44,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:44,590 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:44,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:44,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:44,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:44,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:44,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:44,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:13:44,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:44,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:44,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:44,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:44,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:44,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:44,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:44,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:44,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:13:44,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:44,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:44,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:44,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:44,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:44,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:44,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:44,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:44,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:44,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:13:44,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:44,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-28 10:13:44,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:44,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:44,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:44,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:44,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 10:13:44,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 10:13:44,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679520392] [2020-10-28 10:13:44,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:44,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:13:44,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100038281] [2020-10-28 10:13:44,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:13:44,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:13:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:13:44,926 INFO L87 Difference]: Start difference. First operand 40945 states and 56062 transitions. Second operand 5 states. [2020-10-28 10:13:45,127 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:48,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:48,526 INFO L93 Difference]: Finished difference Result 101060 states and 139741 transitions. [2020-10-28 10:13:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:13:48,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-10-28 10:13:48,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:48,872 INFO L225 Difference]: With dead ends: 101060 [2020-10-28 10:13:48,872 INFO L226 Difference]: Without dead ends: 61377 [2020-10-28 10:13:48,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61377 states. [2020-10-28 10:13:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61377 to 44721. [2020-10-28 10:13:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44721 states. [2020-10-28 10:13:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44721 states to 44721 states and 61419 transitions. [2020-10-28 10:13:51,053 INFO L78 Accepts]: Start accepts. Automaton has 44721 states and 61419 transitions. Word has length 241 [2020-10-28 10:13:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:51,054 INFO L481 AbstractCegarLoop]: Abstraction has 44721 states and 61419 transitions. [2020-10-28 10:13:51,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:13:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 44721 states and 61419 transitions. [2020-10-28 10:13:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-28 10:13:51,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:51,118 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:51,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 10:13:51,118 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:51,119 INFO L82 PathProgramCache]: Analyzing trace with hash 882409904, now seen corresponding path program 1 times [2020-10-28 10:13:51,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:51,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793621041] [2020-10-28 10:13:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:51,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:51,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:51,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:51,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:56,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:56,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-28 10:13:56,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:56,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 10:13:56,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:56,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:56,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:13:56,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:13:56,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 10:13:56,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:56,414 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:56,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:56,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:56,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:56,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:56,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:56,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:13:56,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:56,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:56,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:56,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:56,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:56,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:56,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:56,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:56,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:56,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:56,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:13:56,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:56,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:56,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:56,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:56,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:13:56,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:56,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:56,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:56,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:56,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:56,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:13:56,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:13:56,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-28 10:13:56,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:56,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:56,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:56,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:56,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:13:56,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:56,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 10:13:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:56,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:56,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:56,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:13:56,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:56,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 10:13:56,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:56,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:56,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:56,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:56,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 10:13:56,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:56,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 10:13:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:56,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:56,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:56,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:13:56,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:56,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 10:13:56,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:56,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:56,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:56,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:13:56,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:56,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 81 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 10:13:56,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793621041] [2020-10-28 10:13:56,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:56,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:13:56,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055813897] [2020-10-28 10:13:56,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:56,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:56,858 INFO L87 Difference]: Start difference. First operand 44721 states and 61419 transitions. Second operand 7 states. [2020-10-28 10:13:57,181 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:57,789 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:01,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:01,202 INFO L93 Difference]: Finished difference Result 88193 states and 121769 transitions. [2020-10-28 10:14:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:14:01,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 244 [2020-10-28 10:14:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:01,320 INFO L225 Difference]: With dead ends: 88193 [2020-10-28 10:14:01,320 INFO L226 Difference]: Without dead ends: 44734 [2020-10-28 10:14:01,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:14:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44734 states. [2020-10-28 10:14:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44734 to 41434. [2020-10-28 10:14:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41434 states. [2020-10-28 10:14:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41434 states to 41434 states and 52504 transitions. [2020-10-28 10:14:02,975 INFO L78 Accepts]: Start accepts. Automaton has 41434 states and 52504 transitions. Word has length 244 [2020-10-28 10:14:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:02,975 INFO L481 AbstractCegarLoop]: Abstraction has 41434 states and 52504 transitions. [2020-10-28 10:14:02,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 41434 states and 52504 transitions. [2020-10-28 10:14:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-28 10:14:03,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:03,009 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:03,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 10:14:03,009 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:03,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:03,010 INFO L82 PathProgramCache]: Analyzing trace with hash -565808999, now seen corresponding path program 1 times [2020-10-28 10:14:03,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:03,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980672386] [2020-10-28 10:14:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:03,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:03,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:03,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:03,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:08,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:08,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-28 10:14:08,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:14:08,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 10:14:08,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:08,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:08,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:08,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 10:14:08,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 10:14:08,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:08,263 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:08,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:08,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:08,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:08,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:08,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:08,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:14:08,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:08,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:08,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:08,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:08,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:08,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:08,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:08,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:08,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:14:08,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:08,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:08,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:08,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:08,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:08,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:08,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:08,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:08,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:08,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:14:08,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:08,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:14:08,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:08,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:08,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:08,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:08,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:08,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:08,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 10:14:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:08,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:08,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:08,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:14:08,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:08,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:14:08,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:08,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:08,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:08,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:08,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:14:08,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:08,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 10:14:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:08,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:08,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:14:08,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:08,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-28 10:14:08,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:08,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:08,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:14:08,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-28 10:14:08,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980672386] [2020-10-28 10:14:08,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:08,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:08,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668766054] [2020-10-28 10:14:08,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:08,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:08,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:08,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:08,631 INFO L87 Difference]: Start difference. First operand 41434 states and 52504 transitions. Second operand 7 states. [2020-10-28 10:14:08,955 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:09,219 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:15,677 INFO L93 Difference]: Finished difference Result 151778 states and 208612 transitions. [2020-10-28 10:14:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:14:15,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 256 [2020-10-28 10:14:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:16,076 INFO L225 Difference]: With dead ends: 151778 [2020-10-28 10:14:16,076 INFO L226 Difference]: Without dead ends: 111606 [2020-10-28 10:14:16,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:14:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111606 states. [2020-10-28 10:14:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111606 to 110282. [2020-10-28 10:14:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110282 states. [2020-10-28 10:14:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110282 states to 110282 states and 152434 transitions. [2020-10-28 10:14:21,188 INFO L78 Accepts]: Start accepts. Automaton has 110282 states and 152434 transitions. Word has length 256 [2020-10-28 10:14:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:21,188 INFO L481 AbstractCegarLoop]: Abstraction has 110282 states and 152434 transitions. [2020-10-28 10:14:21,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 110282 states and 152434 transitions. [2020-10-28 10:14:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-28 10:14:21,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:21,357 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:21,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 10:14:21,357 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:21,358 INFO L82 PathProgramCache]: Analyzing trace with hash 132304069, now seen corresponding path program 1 times [2020-10-28 10:14:21,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:21,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824764242] [2020-10-28 10:14:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:21,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:21,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:21,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:22,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:26,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:26,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-28 10:14:26,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:14:26,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 10:14:26,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:26,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:26,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:26,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:14:26,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 10:14:26,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:26,659 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:26,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:26,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:26,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:26,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:26,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:26,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:14:26,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:26,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:26,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:26,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:26,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:26,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:26,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:26,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:26,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:14:26,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:26,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:26,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:26,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:26,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:14:26,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:26,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:26,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:26,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:26,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 10:14:26,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:26,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-28 10:14:26,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:26,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 10:14:26,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:26,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 10:14:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:26,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:26,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:26,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:14:26,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:26,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 10:14:26,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:26,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:14:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:26,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 88 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 10:14:27,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824764242] [2020-10-28 10:14:27,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:27,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:27,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664464776] [2020-10-28 10:14:27,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:27,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:27,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:27,078 INFO L87 Difference]: Start difference. First operand 110282 states and 152434 transitions. Second operand 7 states. [2020-10-28 10:14:27,290 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:28,195 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:37,251 INFO L93 Difference]: Finished difference Result 259361 states and 429545 transitions. [2020-10-28 10:14:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:14:37,252 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 255 [2020-10-28 10:14:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:38,756 INFO L225 Difference]: With dead ends: 259361 [2020-10-28 10:14:38,756 INFO L226 Difference]: Without dead ends: 150130 [2020-10-28 10:14:38,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:14:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150130 states. [2020-10-28 10:14:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150130 to 139246. [2020-10-28 10:14:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139246 states. [2020-10-28 10:14:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139246 states to 139246 states and 185704 transitions. [2020-10-28 10:14:45,726 INFO L78 Accepts]: Start accepts. Automaton has 139246 states and 185704 transitions. Word has length 255 [2020-10-28 10:14:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:45,726 INFO L481 AbstractCegarLoop]: Abstraction has 139246 states and 185704 transitions. [2020-10-28 10:14:45,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 139246 states and 185704 transitions. [2020-10-28 10:14:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-10-28 10:14:45,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:45,894 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:45,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 10:14:45,895 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:45,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1697559658, now seen corresponding path program 1 times [2020-10-28 10:14:45,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:45,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631996447] [2020-10-28 10:14:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:45,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:46,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:48,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:50,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:50,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:50,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-28 10:14:50,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:14:50,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 10:14:50,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:50,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:50,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:50,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 10:14:50,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 10:14:50,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:51,190 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:51,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:51,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:51,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:51,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:51,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:51,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:14:51,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:51,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:51,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:51,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:51,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:51,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:51,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:14:51,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:51,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:14:51,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:51,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:51,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:51,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:51,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:14:51,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:51,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:14:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:51,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:51,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:51,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:14:51,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:51,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 10:14:51,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:51,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:51,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:51,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:51,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 10:14:51,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:51,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 10:14:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:51,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:51,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:51,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:14:51,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:51,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 10:14:51,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:51,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:51,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:51,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:14:51,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:51,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 124 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 10:14:51,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631996447] [2020-10-28 10:14:51,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:51,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:51,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684299799] [2020-10-28 10:14:51,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:51,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:51,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:51,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:51,716 INFO L87 Difference]: Start difference. First operand 139246 states and 185704 transitions. Second operand 7 states. [2020-10-28 10:14:52,158 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:53,583 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:15:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:02,056 INFO L93 Difference]: Finished difference Result 291012 states and 422226 transitions. [2020-10-28 10:15:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:15:02,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 282 [2020-10-28 10:15:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:03,359 INFO L225 Difference]: With dead ends: 291012 [2020-10-28 10:15:03,360 INFO L226 Difference]: Without dead ends: 154071 [2020-10-28 10:15:03,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:15:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154071 states.