/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:19:50,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:19:50,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:19:50,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:19:50,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:19:50,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:19:50,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:19:50,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:19:50,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:19:50,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:19:50,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:19:50,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:19:50,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:19:50,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:19:50,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:19:50,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:19:50,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:19:50,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:19:50,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:19:50,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:19:50,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:19:50,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:19:50,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:19:50,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:19:50,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:19:50,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:19:50,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:19:50,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:19:50,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:19:50,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:19:50,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:19:50,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:19:50,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:19:50,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:19:50,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:19:50,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:19:50,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:19:50,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:19:51,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:19:51,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:19:51,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:19:51,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:19:51,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:19:51,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:19:51,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:19:51,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:19:51,063 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:19:51,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:19:51,064 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:19:51,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:19:51,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:19:51,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:19:51,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:19:51,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:19:51,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:19:51,065 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:19:51,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:19:51,065 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:19:51,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:19:51,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:19:51,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:19:51,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:19:51,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:19:51,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:19:51,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:19:51,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:19:51,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:19:51,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:19:51,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:19:51,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:19:51,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:19:51,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:19:51,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:19:51,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:19:51,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:19:51,492 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:19:51,493 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:19:51,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label05.c [2020-10-27 18:19:51,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0d7ea50e/326f2dc80e1348e4a2ef349217e4ffc1/FLAG38d752cf2 [2020-10-27 18:19:52,508 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:19:52,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label05.c [2020-10-27 18:19:52,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0d7ea50e/326f2dc80e1348e4a2ef349217e4ffc1/FLAG38d752cf2 [2020-10-27 18:19:52,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0d7ea50e/326f2dc80e1348e4a2ef349217e4ffc1 [2020-10-27 18:19:52,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:19:52,675 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:19:52,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:19:52,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:19:52,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:19:52,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:19:52" (1/1) ... [2020-10-27 18:19:52,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2351fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:52, skipping insertion in model container [2020-10-27 18:19:52,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:19:52" (1/1) ... [2020-10-27 18:19:52,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:19:52,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:19:53,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:19:53,654 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:19:53,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:19:54,008 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:19:54,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:54 WrapperNode [2020-10-27 18:19:54,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:19:54,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:19:54,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:19:54,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:19:54,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:54" (1/1) ... [2020-10-27 18:19:54,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:54" (1/1) ... [2020-10-27 18:19:54,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:54" (1/1) ... [2020-10-27 18:19:54,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:54" (1/1) ... [2020-10-27 18:19:54,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:54" (1/1) ... [2020-10-27 18:19:54,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:54" (1/1) ... [2020-10-27 18:19:54,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:54" (1/1) ... [2020-10-27 18:19:54,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:19:54,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:19:54,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:19:54,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:19:54,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:19:54,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:19:54,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:19:54,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:19:54,319 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:19:54,319 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:19:54,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:19:54,320 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:19:54,320 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:19:54,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:19:54,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:19:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:19:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:19:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:19:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:19:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:19:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:19:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:19:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:19:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:19:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:19:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:19:58,162 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:19:58,163 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:19:58,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:19:58 BoogieIcfgContainer [2020-10-27 18:19:58,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:19:58,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:19:58,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:19:58,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:19:58,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:19:52" (1/3) ... [2020-10-27 18:19:58,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ea312b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:19:58, skipping insertion in model container [2020-10-27 18:19:58,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:19:54" (2/3) ... [2020-10-27 18:19:58,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ea312b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:19:58, skipping insertion in model container [2020-10-27 18:19:58,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:19:58" (3/3) ... [2020-10-27 18:19:58,176 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label05.c [2020-10-27 18:19:58,190 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:19:58,196 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:19:58,212 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:19:58,248 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:19:58,248 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:19:58,248 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:19:58,248 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:19:58,249 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:19:58,249 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:19:58,249 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:19:58,249 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:19:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-27 18:19:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 18:19:58,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:19:58,291 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] [2020-10-27 18:19:58,291 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:19:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:19:58,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1575287431, now seen corresponding path program 1 times [2020-10-27 18:19:58,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:19:58,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316629604] [2020-10-27 18:19:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:19:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:19:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:19:59,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:19:59,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:19:59,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:19:59,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-27 18:19:59,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:19:59,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:19:59,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:19:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 18:19:59,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:19:59,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:19:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:19:59,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:19:59,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:19:59,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:19:59,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:19:59,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 18:19:59,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:19:59,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:19:59,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:19:59,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:19:59,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:19:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:19:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316629604] [2020-10-27 18:19:59,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:19:59,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 18:19:59,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297391286] [2020-10-27 18:19:59,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:19:59,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:19:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:19:59,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:19:59,488 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 5 states. [2020-10-27 18:20:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:20:08,615 INFO L93 Difference]: Finished difference Result 1522 states and 2792 transitions. [2020-10-27 18:20:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:20:08,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-27 18:20:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:20:08,643 INFO L225 Difference]: With dead ends: 1522 [2020-10-27 18:20:08,644 INFO L226 Difference]: Without dead ends: 1011 [2020-10-27 18:20:08,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:20:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-10-27 18:20:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1001. [2020-10-27 18:20:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-10-27 18:20:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1379 transitions. [2020-10-27 18:20:08,859 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1379 transitions. Word has length 71 [2020-10-27 18:20:08,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:20:08,860 INFO L481 AbstractCegarLoop]: Abstraction has 1001 states and 1379 transitions. [2020-10-27 18:20:08,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:20:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1379 transitions. [2020-10-27 18:20:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 18:20:08,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:20:08,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:20:08,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:20:08,873 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:20:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:20:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2006284399, now seen corresponding path program 1 times [2020-10-27 18:20:08,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:20:08,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679323308] [2020-10-27 18:20:08,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:20:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:08,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:09,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:09,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:12,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:12,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 18:20:12,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:20:12,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3934 [2020-10-27 18:20:12,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:12,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:20:12,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 18:20:12,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 18:20:12,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:20:13,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:20:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:13,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:13,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:13,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:20:13,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:13,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:20:13,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:13,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:20:13,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:13,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:20:13,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:13,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:20:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:13,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:13,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:13,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:20:13,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:13,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 18:20:13,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:13,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:20:13,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:13,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:20:13,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:20:13,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679323308] [2020-10-27 18:20:13,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:20:13,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:20:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256406519] [2020-10-27 18:20:13,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:20:13,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:20:13,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:20:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:20:13,662 INFO L87 Difference]: Start difference. First operand 1001 states and 1379 transitions. Second operand 8 states. [2020-10-27 18:20:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:20:22,107 INFO L93 Difference]: Finished difference Result 1820 states and 2543 transitions. [2020-10-27 18:20:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:20:22,113 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 140 [2020-10-27 18:20:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:20:22,120 INFO L225 Difference]: With dead ends: 1820 [2020-10-27 18:20:22,120 INFO L226 Difference]: Without dead ends: 1007 [2020-10-27 18:20:22,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:20:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2020-10-27 18:20:22,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1001. [2020-10-27 18:20:22,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-10-27 18:20:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1271 transitions. [2020-10-27 18:20:22,167 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1271 transitions. Word has length 140 [2020-10-27 18:20:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:20:22,168 INFO L481 AbstractCegarLoop]: Abstraction has 1001 states and 1271 transitions. [2020-10-27 18:20:22,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:20:22,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1271 transitions. [2020-10-27 18:20:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 18:20:22,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:20:22,172 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:20:22,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:20:22,172 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:20:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:20:22,173 INFO L82 PathProgramCache]: Analyzing trace with hash -93333853, now seen corresponding path program 1 times [2020-10-27 18:20:22,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:20:22,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107401977] [2020-10-27 18:20:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:20:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:22,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:24,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:24,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 18:20:24,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:20:24,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1836 [2020-10-27 18:20:24,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:24,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:20:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-27 18:20:24,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:20:24,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:24,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:20:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:24,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:24,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:24,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:20:24,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:24,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:20:24,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:24,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:20:24,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:24,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:20:24,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:24,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:20:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:24,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:24,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:24,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:20:24,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:24,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 18:20:24,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:20:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 18:20:24,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:20:24,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107401977] [2020-10-27 18:20:24,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:20:24,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:20:24,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912601585] [2020-10-27 18:20:24,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:20:24,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:20:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:20:24,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:20:24,427 INFO L87 Difference]: Start difference. First operand 1001 states and 1271 transitions. Second operand 5 states. [2020-10-27 18:20:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:20:33,356 INFO L93 Difference]: Finished difference Result 2055 states and 2778 transitions. [2020-10-27 18:20:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:20:33,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-10-27 18:20:33,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:20:33,369 INFO L225 Difference]: With dead ends: 2055 [2020-10-27 18:20:33,369 INFO L226 Difference]: Without dead ends: 1369 [2020-10-27 18:20:33,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:20:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2020-10-27 18:20:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1360. [2020-10-27 18:20:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2020-10-27 18:20:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1804 transitions. [2020-10-27 18:20:33,422 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1804 transitions. Word has length 151 [2020-10-27 18:20:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:20:33,424 INFO L481 AbstractCegarLoop]: Abstraction has 1360 states and 1804 transitions. [2020-10-27 18:20:33,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:20:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1804 transitions. [2020-10-27 18:20:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 18:20:33,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:20:33,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:20:33,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:20:33,430 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:20:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:20:33,432 INFO L82 PathProgramCache]: Analyzing trace with hash 452452843, now seen corresponding path program 1 times [2020-10-27 18:20:33,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:20:33,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136703963] [2020-10-27 18:20:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:20:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:33,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:33,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:33,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:35,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:35,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-27 18:20:35,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:20:35,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2275 [2020-10-27 18:20:35,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:20:35,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 18:20:35,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:20:35,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 18:20:35,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:20:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:35,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:35,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:35,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:20:35,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:35,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:20:35,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:35,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:20:35,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:35,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:20:35,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:20:35,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:20:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:35,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:36,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:36,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 18:20:36,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:36,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 18:20:36,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:20:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 18:20:36,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:20:36,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136703963] [2020-10-27 18:20:36,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:20:36,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:20:36,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089651914] [2020-10-27 18:20:36,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:20:36,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:20:36,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:20:36,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:20:36,163 INFO L87 Difference]: Start difference. First operand 1360 states and 1804 transitions. Second operand 5 states. [2020-10-27 18:20:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:20:45,848 INFO L93 Difference]: Finished difference Result 4001 states and 5361 transitions. [2020-10-27 18:20:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:20:45,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-27 18:20:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:20:45,876 INFO L225 Difference]: With dead ends: 4001 [2020-10-27 18:20:45,876 INFO L226 Difference]: Without dead ends: 2647 [2020-10-27 18:20:45,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:20:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2020-10-27 18:20:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2632. [2020-10-27 18:20:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2632 states. [2020-10-27 18:20:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 3292 transitions. [2020-10-27 18:20:45,972 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 3292 transitions. Word has length 162 [2020-10-27 18:20:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:20:45,973 INFO L481 AbstractCegarLoop]: Abstraction has 2632 states and 3292 transitions. [2020-10-27 18:20:45,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:20:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 3292 transitions. [2020-10-27 18:20:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 18:20:45,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:20:45,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:20:45,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:20:45,977 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:20:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:20:45,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1637106038, now seen corresponding path program 1 times [2020-10-27 18:20:45,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:20:45,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836456303] [2020-10-27 18:20:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:20:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:46,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:46,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:47,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:47,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 18:20:47,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:20:47,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1439 [2020-10-27 18:20:47,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:47,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:20:47,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 106 [2020-10-27 18:20:47,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:20:47,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:47,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:20:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:47,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:47,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:47,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:20:47,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:47,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:20:47,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:20:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:20:47,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:47,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:20:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:47,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:47,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:47,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 18:20:47,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:47,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 18:20:47,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:47,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:20:47,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:47,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 18:20:47,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:20:47,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836456303] [2020-10-27 18:20:47,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:20:47,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:20:47,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328771574] [2020-10-27 18:20:47,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:20:47,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:20:47,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:20:47,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:20:47,824 INFO L87 Difference]: Start difference. First operand 2632 states and 3292 transitions. Second operand 5 states. [2020-10-27 18:20:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:20:54,475 INFO L93 Difference]: Finished difference Result 7133 states and 9138 transitions. [2020-10-27 18:20:54,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:20:54,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-10-27 18:20:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:20:54,508 INFO L225 Difference]: With dead ends: 7133 [2020-10-27 18:20:54,508 INFO L226 Difference]: Without dead ends: 4507 [2020-10-27 18:20:54,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:20:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2020-10-27 18:20:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 4500. [2020-10-27 18:20:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4500 states. [2020-10-27 18:20:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 5374 transitions. [2020-10-27 18:20:54,670 INFO L78 Accepts]: Start accepts. Automaton has 4500 states and 5374 transitions. Word has length 167 [2020-10-27 18:20:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:20:54,671 INFO L481 AbstractCegarLoop]: Abstraction has 4500 states and 5374 transitions. [2020-10-27 18:20:54,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:20:54,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4500 states and 5374 transitions. [2020-10-27 18:20:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 18:20:54,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:20:54,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:20:54,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:20:54,677 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:20:54,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:20:54,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1439173922, now seen corresponding path program 1 times [2020-10-27 18:20:54,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:20:54,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081142951] [2020-10-27 18:20:54,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:20:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:54,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:55,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:55,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:55,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-27 18:20:55,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:20:55,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1087 [2020-10-27 18:20:55,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:55,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:20:55,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-27 18:20:55,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:20:55,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:56,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:20:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:56,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:56,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:56,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:20:56,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:56,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:20:56,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:56,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:20:56,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:56,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:20:56,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:56,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:20:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:20:56,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:20:56,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:20:56,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:20:56,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:20:56,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 18:20:56,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:20:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:20:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:20:56,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 18:20:56,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:20:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:20:56,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081142951] [2020-10-27 18:20:56,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:20:56,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:20:56,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627873660] [2020-10-27 18:20:56,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:20:56,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:20:56,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:20:56,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:20:56,326 INFO L87 Difference]: Start difference. First operand 4500 states and 5374 transitions. Second operand 5 states. [2020-10-27 18:21:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:21:04,607 INFO L93 Difference]: Finished difference Result 9313 states and 11427 transitions. [2020-10-27 18:21:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:21:04,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-27 18:21:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:21:04,649 INFO L225 Difference]: With dead ends: 9313 [2020-10-27 18:21:04,649 INFO L226 Difference]: Without dead ends: 5749 [2020-10-27 18:21:04,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:21:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2020-10-27 18:21:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 5743. [2020-10-27 18:21:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5743 states. [2020-10-27 18:21:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5743 states to 5743 states and 6961 transitions. [2020-10-27 18:21:04,863 INFO L78 Accepts]: Start accepts. Automaton has 5743 states and 6961 transitions. Word has length 170 [2020-10-27 18:21:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:21:04,864 INFO L481 AbstractCegarLoop]: Abstraction has 5743 states and 6961 transitions. [2020-10-27 18:21:04,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:21:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5743 states and 6961 transitions. [2020-10-27 18:21:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 18:21:04,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:21:04,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:21:04,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:21:04,869 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:21:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:21:04,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1371922982, now seen corresponding path program 1 times [2020-10-27 18:21:04,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:21:04,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92225245] [2020-10-27 18:21:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:21:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:04,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:05,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:06,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:06,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:06,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 18:21:06,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:21:06,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-27 18:21:06,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:06,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:21:06,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-10-27 18:21:06,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:21:06,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:06,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:21:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:06,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:06,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:06,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:21:06,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:06,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:21:06,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:06,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:06,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:06,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:06,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:06,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:21:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:06,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:06,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:06,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 18:21:06,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:06,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 18:21:06,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:06,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:21:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 18:21:06,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:21:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:21:06,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92225245] [2020-10-27 18:21:06,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:21:06,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:21:06,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060644570] [2020-10-27 18:21:06,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:21:06,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:21:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:21:06,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:21:06,738 INFO L87 Difference]: Start difference. First operand 5743 states and 6961 transitions. Second operand 6 states. [2020-10-27 18:21:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:21:16,355 INFO L93 Difference]: Finished difference Result 16768 states and 21333 transitions. [2020-10-27 18:21:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:21:16,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2020-10-27 18:21:16,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:21:16,429 INFO L225 Difference]: With dead ends: 16768 [2020-10-27 18:21:16,429 INFO L226 Difference]: Without dead ends: 11031 [2020-10-27 18:21:16,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:21:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11031 states. [2020-10-27 18:21:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11031 to 10088. [2020-10-27 18:21:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10088 states. [2020-10-27 18:21:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10088 states to 10088 states and 12450 transitions. [2020-10-27 18:21:16,748 INFO L78 Accepts]: Start accepts. Automaton has 10088 states and 12450 transitions. Word has length 181 [2020-10-27 18:21:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:21:16,749 INFO L481 AbstractCegarLoop]: Abstraction has 10088 states and 12450 transitions. [2020-10-27 18:21:16,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:21:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 10088 states and 12450 transitions. [2020-10-27 18:21:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-10-27 18:21:16,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:21:16,765 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:21:16,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:21:16,765 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:21:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:21:16,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1085917228, now seen corresponding path program 1 times [2020-10-27 18:21:16,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:21:16,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692517156] [2020-10-27 18:21:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:21:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:16,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:16,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:17,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:18,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:21,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:21,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-27 18:21:21,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:21:21,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 18:21:21,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:21,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:21:21,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 223 [2020-10-27 18:21:21,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:21:21,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:22,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:21:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:22,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:22,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:22,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:21:22,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:22,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:21:22,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:22,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:22,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:22,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:22,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:22,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:21:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:22,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:22,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:22,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:21:22,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:22,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 18:21:22,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:21:22,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 18:21:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:22,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:22,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:22,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 18:21:22,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:22,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-27 18:21:22,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:22,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:21:22,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:22,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 18:21:22,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:21:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 18:21:22,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692517156] [2020-10-27 18:21:22,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:21:22,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:21:22,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560446083] [2020-10-27 18:21:22,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:21:22,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:21:22,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:21:22,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:21:22,501 INFO L87 Difference]: Start difference. First operand 10088 states and 12450 transitions. Second operand 5 states. [2020-10-27 18:21:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:21:31,941 INFO L93 Difference]: Finished difference Result 23626 states and 30117 transitions. [2020-10-27 18:21:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:21:31,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 282 [2020-10-27 18:21:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:21:31,997 INFO L225 Difference]: With dead ends: 23626 [2020-10-27 18:21:31,997 INFO L226 Difference]: Without dead ends: 14783 [2020-10-27 18:21:32,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:21:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14783 states. [2020-10-27 18:21:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14783 to 14759. [2020-10-27 18:21:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14759 states. [2020-10-27 18:21:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14759 states to 14759 states and 18080 transitions. [2020-10-27 18:21:32,427 INFO L78 Accepts]: Start accepts. Automaton has 14759 states and 18080 transitions. Word has length 282 [2020-10-27 18:21:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:21:32,428 INFO L481 AbstractCegarLoop]: Abstraction has 14759 states and 18080 transitions. [2020-10-27 18:21:32,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:21:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 14759 states and 18080 transitions. [2020-10-27 18:21:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-27 18:21:32,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:21:32,449 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:21:32,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:21:32,449 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:21:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:21:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1945534084, now seen corresponding path program 1 times [2020-10-27 18:21:32,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:21:32,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587661995] [2020-10-27 18:21:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:21:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:32,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:32,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:34,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:35,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:37,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:37,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-27 18:21:37,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:21:37,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 18:21:37,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:37,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:21:37,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 242 [2020-10-27 18:21:37,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:21:37,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:37,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:21:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:37,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:37,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:37,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:21:37,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:37,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:21:37,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:37,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:37,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:37,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:21:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:37,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:37,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:37,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:21:37,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:37,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 18:21:37,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:37,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:37,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:37,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:37,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:37,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 18:21:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:37,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:38,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:38,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 18:21:38,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:38,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 18:21:38,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:38,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:21:38,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:38,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-27 18:21:38,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 18:21:38,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587661995] [2020-10-27 18:21:38,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:21:38,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:21:38,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255563002] [2020-10-27 18:21:38,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:21:38,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:21:38,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:21:38,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:21:38,185 INFO L87 Difference]: Start difference. First operand 14759 states and 18080 transitions. Second operand 5 states. [2020-10-27 18:21:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:21:48,501 INFO L93 Difference]: Finished difference Result 34483 states and 43501 transitions. [2020-10-27 18:21:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:21:48,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2020-10-27 18:21:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:21:48,591 INFO L225 Difference]: With dead ends: 34483 [2020-10-27 18:21:48,591 INFO L226 Difference]: Without dead ends: 20969 [2020-10-27 18:21:48,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:21:48,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20969 states. [2020-10-27 18:21:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20969 to 20954. [2020-10-27 18:21:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20954 states. [2020-10-27 18:21:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20954 states to 20954 states and 25955 transitions. [2020-10-27 18:21:49,282 INFO L78 Accepts]: Start accepts. Automaton has 20954 states and 25955 transitions. Word has length 301 [2020-10-27 18:21:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:21:49,283 INFO L481 AbstractCegarLoop]: Abstraction has 20954 states and 25955 transitions. [2020-10-27 18:21:49,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:21:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 20954 states and 25955 transitions. [2020-10-27 18:21:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-27 18:21:49,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:21:49,309 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:21:49,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:21:49,309 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:21:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:21:49,310 INFO L82 PathProgramCache]: Analyzing trace with hash 858170368, now seen corresponding path program 1 times [2020-10-27 18:21:49,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:21:49,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592209027] [2020-10-27 18:21:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:21:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:49,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:49,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:49,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:52,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:54,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:54,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-27 18:21:54,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:21:54,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 18:21:54,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:54,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:21:54,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 245 [2020-10-27 18:21:54,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 18:21:54,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:54,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:21:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:54,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:54,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:21:54,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:54,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:21:54,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:54,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:54,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:21:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:54,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:54,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:54,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:21:54,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:54,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 18:21:54,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:54,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:21:54,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:54,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:21:54,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:54,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 18:21:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:21:54,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:21:54,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:21:54,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 18:21:54,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:21:54,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-27 18:21:54,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:21:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:21:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:21:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 18:21:54,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:21:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 18:21:55,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592209027] [2020-10-27 18:21:55,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:21:55,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:21:55,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827757724] [2020-10-27 18:21:55,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:21:55,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:21:55,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:21:55,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:21:55,167 INFO L87 Difference]: Start difference. First operand 20954 states and 25955 transitions. Second operand 5 states. [2020-10-27 18:21:58,316 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-27 18:22:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:22:01,458 INFO L93 Difference]: Finished difference Result 40706 states and 50712 transitions. [2020-10-27 18:22:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:22:01,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 304 [2020-10-27 18:22:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:22:01,536 INFO L225 Difference]: With dead ends: 40706 [2020-10-27 18:22:01,536 INFO L226 Difference]: Without dead ends: 20964 [2020-10-27 18:22:01,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:22:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20964 states. [2020-10-27 18:22:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20964 to 20954. [2020-10-27 18:22:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20954 states. [2020-10-27 18:22:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20954 states to 20954 states and 25927 transitions. [2020-10-27 18:22:02,057 INFO L78 Accepts]: Start accepts. Automaton has 20954 states and 25927 transitions. Word has length 304 [2020-10-27 18:22:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:22:02,058 INFO L481 AbstractCegarLoop]: Abstraction has 20954 states and 25927 transitions. [2020-10-27 18:22:02,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:22:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 20954 states and 25927 transitions. [2020-10-27 18:22:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-27 18:22:02,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:22:02,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:22:02,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:22:02,090 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:22:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:22:02,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1830003868, now seen corresponding path program 1 times [2020-10-27 18:22:02,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:22:02,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326381578] [2020-10-27 18:22:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:22:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:02,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:02,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:04,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:04,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-27 18:22:04,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:22:04,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1950 [2020-10-27 18:22:04,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:04,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:22:04,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 18:22:04,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-27 18:22:04,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:04,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:22:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:04,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:04,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:04,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:22:04,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:04,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:22:04,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:04,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:22:04,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:04,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:22:04,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:04,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:22:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:04,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:04,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:04,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 18:22:04,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:04,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 18:22:04,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:04,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:22:04,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:04,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 18:22:04,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:04,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-27 18:22:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:04,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:04,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:04,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 18:22:04,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:04,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-27 18:22:04,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:22:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:22:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-27 18:22:04,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:22:05,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326381578] [2020-10-27 18:22:05,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:22:05,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:22:05,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992967404] [2020-10-27 18:22:05,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:22:05,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:22:05,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:22:05,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:22:05,074 INFO L87 Difference]: Start difference. First operand 20954 states and 25927 transitions. Second operand 7 states. [2020-10-27 18:22:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:22:16,660 INFO L93 Difference]: Finished difference Result 45713 states and 58413 transitions. [2020-10-27 18:22:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 18:22:16,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 328 [2020-10-27 18:22:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:22:16,762 INFO L225 Difference]: With dead ends: 45713 [2020-10-27 18:22:16,762 INFO L226 Difference]: Without dead ends: 26004 [2020-10-27 18:22:16,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:22:16,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26004 states. [2020-10-27 18:22:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26004 to 25994. [2020-10-27 18:22:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25994 states. [2020-10-27 18:22:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25994 states to 25994 states and 33035 transitions. [2020-10-27 18:22:17,497 INFO L78 Accepts]: Start accepts. Automaton has 25994 states and 33035 transitions. Word has length 328 [2020-10-27 18:22:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:22:17,498 INFO L481 AbstractCegarLoop]: Abstraction has 25994 states and 33035 transitions. [2020-10-27 18:22:17,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:22:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 25994 states and 33035 transitions. [2020-10-27 18:22:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-27 18:22:17,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:22:17,537 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:22:17,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:22:17,538 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:22:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:22:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash -598050674, now seen corresponding path program 1 times [2020-10-27 18:22:17,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:22:17,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850880895] [2020-10-27 18:22:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:22:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:17,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:17,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:20,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:20,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-27 18:22:20,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:22:20,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3131 [2020-10-27 18:22:20,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:20,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 18:22:20,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-27 18:22:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-27 18:22:20,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:20,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:22:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:20,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:20,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:20,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:22:20,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:20,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:22:20,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:22:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:22:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:20,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:22:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:20,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:21,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:21,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 18:22:21,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:21,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 18:22:21,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:21,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:22:21,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:21,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 18:22:21,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:21,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-27 18:22:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:21,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:21,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:21,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 18:22:21,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:21,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 18:22:21,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:21,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:22:21,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:22:21,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-27 18:22:21,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 161 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:22:21,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850880895] [2020-10-27 18:22:21,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:22:21,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:22:21,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912214680] [2020-10-27 18:22:21,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:22:21,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:22:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:22:21,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:22:21,539 INFO L87 Difference]: Start difference. First operand 25994 states and 33035 transitions. Second operand 8 states. [2020-10-27 18:22:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:22:38,141 INFO L93 Difference]: Finished difference Result 58888 states and 76757 transitions. [2020-10-27 18:22:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 18:22:38,143 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-10-27 18:22:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:22:38,271 INFO L225 Difference]: With dead ends: 58888 [2020-10-27 18:22:38,271 INFO L226 Difference]: Without dead ends: 34139 [2020-10-27 18:22:38,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 18:22:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34139 states. [2020-10-27 18:22:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34139 to 33187. [2020-10-27 18:22:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33187 states. [2020-10-27 18:22:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33187 states to 33187 states and 43087 transitions. [2020-10-27 18:22:39,155 INFO L78 Accepts]: Start accepts. Automaton has 33187 states and 43087 transitions. Word has length 342 [2020-10-27 18:22:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:22:39,156 INFO L481 AbstractCegarLoop]: Abstraction has 33187 states and 43087 transitions. [2020-10-27 18:22:39,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:22:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 33187 states and 43087 transitions. [2020-10-27 18:22:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-10-27 18:22:39,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:22:39,220 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:22:39,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:22:39,220 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:22:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:22:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2002239992, now seen corresponding path program 1 times [2020-10-27 18:22:39,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:22:39,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541854475] [2020-10-27 18:22:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:22:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:39,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:40,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:41,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:44,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:44,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-10-27 18:22:44,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:22:44,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 18:22:44,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:22:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 357 [2020-10-27 18:22:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:22:44,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:44,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:22:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:44,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:44,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:44,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:22:44,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:44,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:22:44,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:44,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:22:44,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:44,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:22:44,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:44,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:22:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:44,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:44,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:44,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:22:44,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:44,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 18:22:44,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:44,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:22:44,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:44,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:22:44,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:44,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 18:22:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:44,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:44,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:22:44,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-27 18:22:44,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:22:44,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-27 18:22:44,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:22:44,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:22:44,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:22:44,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 260 [2020-10-27 18:22:44,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:22:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 18:22:45,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541854475] [2020-10-27 18:22:45,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:22:45,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:22:45,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285998515] [2020-10-27 18:22:45,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:22:45,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:22:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:22:45,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:22:45,292 INFO L87 Difference]: Start difference. First operand 33187 states and 43087 transitions. Second operand 5 states. [2020-10-27 18:22:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:22:54,861 INFO L93 Difference]: Finished difference Result 77894 states and 102575 transitions. [2020-10-27 18:22:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:22:54,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 416 [2020-10-27 18:22:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:22:55,062 INFO L225 Difference]: With dead ends: 77894 [2020-10-27 18:22:55,063 INFO L226 Difference]: Without dead ends: 44713 [2020-10-27 18:22:55,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:22:55,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44713 states. [2020-10-27 18:22:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44713 to 44683. [2020-10-27 18:22:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44683 states. [2020-10-27 18:22:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44683 states to 44683 states and 57659 transitions. [2020-10-27 18:22:56,391 INFO L78 Accepts]: Start accepts. Automaton has 44683 states and 57659 transitions. Word has length 416 [2020-10-27 18:22:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:22:56,392 INFO L481 AbstractCegarLoop]: Abstraction has 44683 states and 57659 transitions. [2020-10-27 18:22:56,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:22:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 44683 states and 57659 transitions. [2020-10-27 18:22:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-10-27 18:22:56,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:22:56,450 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:22:56,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 18:22:56,451 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:22:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:22:56,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1430255835, now seen corresponding path program 1 times [2020-10-27 18:22:56,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:22:56,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609725215] [2020-10-27 18:22:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:22:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:22:56,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:56,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:57,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:22:58,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:00,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:01,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:01,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 450 [2020-10-27 18:23:01,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:23:01,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 18:23:01,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:01,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:23:01,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 376 [2020-10-27 18:23:01,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:23:01,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:01,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:23:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:01,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:01,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:01,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:23:01,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:23:01,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:23:01,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:01,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:23:01,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:23:01,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:23:01,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:01,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:23:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:01,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:01,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:01,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:23:01,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:23:01,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 18:23:01,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:01,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:23:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:23:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:23:01,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:01,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 18:23:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:02,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:02,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:02,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-27 18:23:02,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:23:02,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-27 18:23:02,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:23:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:23:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 279 [2020-10-27 18:23:02,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 18:23:02,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609725215] [2020-10-27 18:23:02,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:23:02,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:23:02,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970499668] [2020-10-27 18:23:02,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:23:02,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:23:02,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:23:02,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:23:02,476 INFO L87 Difference]: Start difference. First operand 44683 states and 57659 transitions. Second operand 5 states. [2020-10-27 18:23:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:23:13,965 INFO L93 Difference]: Finished difference Result 105776 states and 139351 transitions. [2020-10-27 18:23:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:23:13,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 436 [2020-10-27 18:23:13,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:23:14,240 INFO L225 Difference]: With dead ends: 105776 [2020-10-27 18:23:14,241 INFO L226 Difference]: Without dead ends: 61406 [2020-10-27 18:23:14,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:23:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61406 states. [2020-10-27 18:23:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61406 to 60762. [2020-10-27 18:23:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60762 states. [2020-10-27 18:23:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60762 states to 60762 states and 78001 transitions. [2020-10-27 18:23:16,313 INFO L78 Accepts]: Start accepts. Automaton has 60762 states and 78001 transitions. Word has length 436 [2020-10-27 18:23:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:23:16,314 INFO L481 AbstractCegarLoop]: Abstraction has 60762 states and 78001 transitions. [2020-10-27 18:23:16,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:23:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 60762 states and 78001 transitions. [2020-10-27 18:23:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-10-27 18:23:16,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:23:16,524 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:23:16,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 18:23:16,525 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:23:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:23:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash 673743301, now seen corresponding path program 1 times [2020-10-27 18:23:16,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:23:16,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043662843] [2020-10-27 18:23:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:23:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:16,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:21,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:21,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-10-27 18:23:21,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:23:21,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 18:23:21,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:21,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:23:21,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 218 [2020-10-27 18:23:21,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-27 18:23:21,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:21,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:23:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:21,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:21,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:21,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:23:21,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:23:21,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 18:23:21,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:21,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:23:21,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:23:21,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:23:21,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:21,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:23:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:21,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:21,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:21,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:23:21,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:23:21,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 18:23:21,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:21,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:23:21,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:23:21,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:23:21,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:21,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 18:23:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:21,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:21,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:21,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 18:23:21,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:23:21,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 18:23:21,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:21,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 18:23:21,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:23:21,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 18:23:21,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:21,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-10-27 18:23:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:23:22,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:23:22,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:23:22,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 18:23:22,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:23:22,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-27 18:23:22,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:23:22,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:23:22,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:23:22,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-27 18:23:22,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:23:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 394 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-27 18:23:22,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043662843] [2020-10-27 18:23:22,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:23:22,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:23:22,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280361329] [2020-10-27 18:23:22,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:23:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:23:22,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:23:22,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:23:22,671 INFO L87 Difference]: Start difference. First operand 60762 states and 78001 transitions. Second operand 8 states. [2020-10-27 18:23:22,816 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 18:23:25,598 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65