/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:03:26,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:03:26,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:03:26,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:03:26,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:03:26,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:03:26,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:03:26,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:03:26,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:03:26,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:03:26,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:03:26,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:03:26,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:03:27,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:03:27,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:03:27,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:03:27,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:03:27,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:03:27,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:03:27,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:03:27,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:03:27,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:03:27,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:03:27,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:03:27,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:03:27,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:03:27,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:03:27,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:03:27,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:03:27,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:03:27,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:03:27,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:03:27,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:03:27,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:03:27,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:03:27,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:03:27,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:03:27,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:03:27,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:03:27,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:03:27,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:03:27,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 13:03:27,184 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:03:27,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:03:27,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:03:27,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:03:27,192 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:03:27,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:03:27,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:03:27,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:03:27,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:03:27,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:03:27,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:03:27,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:03:27,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:03:27,197 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:03:27,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:03:27,198 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:03:27,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:03:27,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:03:27,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:03:27,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:03:27,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:03:27,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:03:27,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:03:27,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:03:27,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:03:27,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:03:27,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:03:27,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:03:27,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:03:27,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:03:27,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:03:27,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:03:27,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:03:27,819 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:03:27,820 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:03:27,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19.c [2020-10-28 13:03:27,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f91a0dfc/5d6bc618613a4216a7753964b95bfda3/FLAG4c1f569e2 [2020-10-28 13:03:28,968 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:03:28,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label19.c [2020-10-28 13:03:28,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f91a0dfc/5d6bc618613a4216a7753964b95bfda3/FLAG4c1f569e2 [2020-10-28 13:03:29,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f91a0dfc/5d6bc618613a4216a7753964b95bfda3 [2020-10-28 13:03:29,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:03:29,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:03:29,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:03:29,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:03:29,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:03:29,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:03:29" (1/1) ... [2020-10-28 13:03:29,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7a95fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:29, skipping insertion in model container [2020-10-28 13:03:29,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:03:29" (1/1) ... [2020-10-28 13:03:29,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:03:29,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:03:30,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:03:30,337 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:03:30,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:03:30,786 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:03:30,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:30 WrapperNode [2020-10-28 13:03:30,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:03:30,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:03:30,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:03:30,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:03:30,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:30" (1/1) ... [2020-10-28 13:03:30,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:30" (1/1) ... [2020-10-28 13:03:30,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:30" (1/1) ... [2020-10-28 13:03:30,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:30" (1/1) ... [2020-10-28 13:03:30,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:30" (1/1) ... [2020-10-28 13:03:30,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:30" (1/1) ... [2020-10-28 13:03:31,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:30" (1/1) ... [2020-10-28 13:03:31,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:03:31,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:03:31,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:03:31,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:03:31,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:03:31,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:03:31,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:03:31,163 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:03:31,164 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:03:31,164 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:03:31,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:03:31,166 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:03:31,166 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:03:31,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:03:31,167 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:03:31,168 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:03:31,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:03:31,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:03:31,168 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:03:31,168 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:03:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:03:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:03:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:03:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:03:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:03:31,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:03:35,203 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:03:35,203 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:03:35,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:03:35 BoogieIcfgContainer [2020-10-28 13:03:35,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:03:35,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:03:35,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:03:35,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:03:35,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:03:29" (1/3) ... [2020-10-28 13:03:35,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109d293e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:03:35, skipping insertion in model container [2020-10-28 13:03:35,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:30" (2/3) ... [2020-10-28 13:03:35,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109d293e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:03:35, skipping insertion in model container [2020-10-28 13:03:35,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:03:35" (3/3) ... [2020-10-28 13:03:35,240 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label19.c [2020-10-28 13:03:35,253 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:03:35,260 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:03:35,275 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:03:35,309 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:03:35,310 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:03:35,310 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:03:35,310 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:03:35,310 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:03:35,310 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:03:35,310 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:03:35,311 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:03:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-28 13:03:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 13:03:35,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:03:35,361 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] [2020-10-28 13:03:35,361 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:03:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:03:35,368 INFO L82 PathProgramCache]: Analyzing trace with hash 2026005569, now seen corresponding path program 1 times [2020-10-28 13:03:35,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:03:35,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398894233] [2020-10-28 13:03:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:03:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:35,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:36,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:36,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 13:03:36,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:36,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-10-28 13:03:36,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:36,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:03:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:03:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 13:03:36,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 13:03:36,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:03:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:36,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:36,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:36,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:03:36,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 13:03:36,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:36,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:03:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:03:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:03:36,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:03:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:03:36,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398894233] [2020-10-28 13:03:36,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:03:36,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:03:36,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247907033] [2020-10-28 13:03:36,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:03:36,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:03:36,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:03:36,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:03:36,745 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-28 13:03:36,895 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:03:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:03:47,145 INFO L93 Difference]: Finished difference Result 1204 states and 2170 transitions. [2020-10-28 13:03:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:03:47,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-28 13:03:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:03:47,178 INFO L225 Difference]: With dead ends: 1204 [2020-10-28 13:03:47,178 INFO L226 Difference]: Without dead ends: 698 [2020-10-28 13:03:47,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:03:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-10-28 13:03:47,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 692. [2020-10-28 13:03:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-10-28 13:03:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1013 transitions. [2020-10-28 13:03:47,353 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1013 transitions. Word has length 52 [2020-10-28 13:03:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:03:47,354 INFO L481 AbstractCegarLoop]: Abstraction has 692 states and 1013 transitions. [2020-10-28 13:03:47,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:03:47,354 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1013 transitions. [2020-10-28 13:03:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 13:03:47,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:03:47,362 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:03:47,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:03:47,362 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:03:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:03:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash -439716042, now seen corresponding path program 1 times [2020-10-28 13:03:47,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:03:47,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625040591] [2020-10-28 13:03:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:03:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:47,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:48,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:48,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:50,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:50,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 13:03:50,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:03:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3228 [2020-10-28 13:03:50,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:50,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:50,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:03:50,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:03:50,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:03:50,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:03:50,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:03:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:50,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:50,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:50,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:03:50,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:50,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 13:03:50,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:50,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:50,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:03:50,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:03:50,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:03:50,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 13:03:50,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:03:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:50,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:51,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:51,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 13:03:51,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:51,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-28 13:03:51,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:51,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:51,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:03:51,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:03:51,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:03:51,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:03:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:03:51,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625040591] [2020-10-28 13:03:51,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:03:51,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:03:51,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407618014] [2020-10-28 13:03:51,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:03:51,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:03:51,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:03:51,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:03:51,292 INFO L87 Difference]: Start difference. First operand 692 states and 1013 transitions. Second operand 7 states. [2020-10-28 13:04:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:00,650 INFO L93 Difference]: Finished difference Result 1712 states and 2419 transitions. [2020-10-28 13:04:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:04:00,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-10-28 13:04:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:00,675 INFO L225 Difference]: With dead ends: 1712 [2020-10-28 13:04:00,676 INFO L226 Difference]: Without dead ends: 1026 [2020-10-28 13:04:00,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-28 13:04:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2020-10-28 13:04:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 1015. [2020-10-28 13:04:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-10-28 13:04:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1368 transitions. [2020-10-28 13:04:00,744 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1368 transitions. Word has length 121 [2020-10-28 13:04:00,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:00,745 INFO L481 AbstractCegarLoop]: Abstraction has 1015 states and 1368 transitions. [2020-10-28 13:04:00,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:04:00,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1368 transitions. [2020-10-28 13:04:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 13:04:00,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:00,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:00,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:04:00,749 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash 429496498, now seen corresponding path program 1 times [2020-10-28 13:04:00,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:00,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720838923] [2020-10-28 13:04:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:00,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:00,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:01,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:02,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:02,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 13:04:02,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:04:02,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1529 [2020-10-28 13:04:02,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:02,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:04:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:04:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 13:04:02,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:02,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:02,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:02,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:02,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:02,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:02,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 13:04:02,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:02,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:02,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:02,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:02,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:04:02,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:02,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:02,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:02,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:02,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:04:02,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:02,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-28 13:04:02,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:02,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:02,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:02,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:02,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:04:02,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:04:02,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720838923] [2020-10-28 13:04:02,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:04:02,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 13:04:02,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678121090] [2020-10-28 13:04:02,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:04:02,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:04:02,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:04:02,945 INFO L87 Difference]: Start difference. First operand 1015 states and 1368 transitions. Second operand 8 states. [2020-10-28 13:04:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:23,537 INFO L93 Difference]: Finished difference Result 3021 states and 4376 transitions. [2020-10-28 13:04:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 13:04:23,539 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 126 [2020-10-28 13:04:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:23,554 INFO L225 Difference]: With dead ends: 3021 [2020-10-28 13:04:23,554 INFO L226 Difference]: Without dead ends: 2319 [2020-10-28 13:04:23,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 13:04:23,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2020-10-28 13:04:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1982. [2020-10-28 13:04:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1982 states. [2020-10-28 13:04:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2655 transitions. [2020-10-28 13:04:23,648 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2655 transitions. Word has length 126 [2020-10-28 13:04:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:23,649 INFO L481 AbstractCegarLoop]: Abstraction has 1982 states and 2655 transitions. [2020-10-28 13:04:23,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:04:23,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2655 transitions. [2020-10-28 13:04:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 13:04:23,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:23,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:23,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:04:23,653 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:23,654 INFO L82 PathProgramCache]: Analyzing trace with hash -205360748, now seen corresponding path program 1 times [2020-10-28 13:04:23,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:23,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937340078] [2020-10-28 13:04:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:23,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:23,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:24,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:24,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 13:04:24,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:04:24,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-28 13:04:24,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:24,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:24,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:24,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 13:04:24,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 13:04:24,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:24,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:24,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:24,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:24,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:24,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:24,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:04:24,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:24,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:04:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:04:24,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:24,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:24,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:24,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:24,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 13:04:24,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:24,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-28 13:04:24,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:24,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:24,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:24,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:24,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 13:04:24,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 13:04:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:04:24,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937340078] [2020-10-28 13:04:24,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:04:24,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:04:24,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143446251] [2020-10-28 13:04:24,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:04:24,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:24,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:04:24,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:04:24,834 INFO L87 Difference]: Start difference. First operand 1982 states and 2655 transitions. Second operand 5 states. [2020-10-28 13:04:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:33,882 INFO L93 Difference]: Finished difference Result 4922 states and 6890 transitions. [2020-10-28 13:04:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:04:33,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-10-28 13:04:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:33,914 INFO L225 Difference]: With dead ends: 4922 [2020-10-28 13:04:33,914 INFO L226 Difference]: Without dead ends: 2946 [2020-10-28 13:04:33,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:04:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2020-10-28 13:04:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2937. [2020-10-28 13:04:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2937 states. [2020-10-28 13:04:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 3794 transitions. [2020-10-28 13:04:34,041 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 3794 transitions. Word has length 147 [2020-10-28 13:04:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:34,042 INFO L481 AbstractCegarLoop]: Abstraction has 2937 states and 3794 transitions. [2020-10-28 13:04:34,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:04:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 3794 transitions. [2020-10-28 13:04:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-28 13:04:34,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:34,053 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, 2, 2, 2, 2, 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] [2020-10-28 13:04:34,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:04:34,054 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:34,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:34,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1811212183, now seen corresponding path program 1 times [2020-10-28 13:04:34,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:34,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000021969] [2020-10-28 13:04:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:34,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:34,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:34,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:34,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:37,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:39,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:39,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 13:04:39,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:04:39,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 13:04:39,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:39,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:39,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:39,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 13:04:39,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:04:39,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:39,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:39,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:39,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:39,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:39,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:39,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:04:39,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:39,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:39,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:04:39,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:39,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:04:39,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:39,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:39,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:39,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:39,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 13:04:39,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-28 13:04:39,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:39,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:39,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 13:04:39,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:04:39,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 13:04:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:39,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:39,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:39,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:04:39,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:39,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-28 13:04:39,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:39,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:39,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:39,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:39,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 13:04:39,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 13:04:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:04:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000021969] [2020-10-28 13:04:39,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:04:39,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:04:39,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982536515] [2020-10-28 13:04:39,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:04:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:39,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:04:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:04:39,775 INFO L87 Difference]: Start difference. First operand 2937 states and 3794 transitions. Second operand 7 states. [2020-10-28 13:04:51,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:51,112 INFO L93 Difference]: Finished difference Result 8148 states and 10939 transitions. [2020-10-28 13:04:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:04:51,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2020-10-28 13:04:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:51,140 INFO L225 Difference]: With dead ends: 8148 [2020-10-28 13:04:51,140 INFO L226 Difference]: Without dead ends: 4247 [2020-10-28 13:04:51,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:04:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2020-10-28 13:04:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3882. [2020-10-28 13:04:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3882 states. [2020-10-28 13:04:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3882 states to 3882 states and 4565 transitions. [2020-10-28 13:04:51,286 INFO L78 Accepts]: Start accepts. Automaton has 3882 states and 4565 transitions. Word has length 219 [2020-10-28 13:04:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:51,286 INFO L481 AbstractCegarLoop]: Abstraction has 3882 states and 4565 transitions. [2020-10-28 13:04:51,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:04:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3882 states and 4565 transitions. [2020-10-28 13:04:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-28 13:04:51,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:51,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:51,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:04:51,292 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:51,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:51,292 INFO L82 PathProgramCache]: Analyzing trace with hash -827791033, now seen corresponding path program 1 times [2020-10-28 13:04:51,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:51,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816128697] [2020-10-28 13:04:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:51,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:52,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:53,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:53,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-28 13:04:53,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:04:53,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2426 [2020-10-28 13:04:53,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:53,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:53,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 13:04:53,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:04:53,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 292 [2020-10-28 13:04:53,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:53,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:53,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:54,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:54,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:54,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:54,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 13:04:54,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:54,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:54,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:54,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:04:54,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:54,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:54,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:54,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:54,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-28 13:04:54,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:54,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-28 13:04:54,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:54,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 13:04:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:54,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-28 13:04:54,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:04:55,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816128697] [2020-10-28 13:04:55,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:04:55,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:04:55,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076179338] [2020-10-28 13:04:55,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:04:55,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:55,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:04:55,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:04:55,185 INFO L87 Difference]: Start difference. First operand 3882 states and 4565 transitions. Second operand 8 states. [2020-10-28 13:05:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:07,237 INFO L93 Difference]: Finished difference Result 9983 states and 11611 transitions. [2020-10-28 13:05:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:05:07,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 289 [2020-10-28 13:05:07,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:07,266 INFO L225 Difference]: With dead ends: 9983 [2020-10-28 13:05:07,267 INFO L226 Difference]: Without dead ends: 5798 [2020-10-28 13:05:07,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:05:07,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-10-28 13:05:07,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5773. [2020-10-28 13:05:07,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5773 states. [2020-10-28 13:05:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5773 states to 5773 states and 6665 transitions. [2020-10-28 13:05:07,446 INFO L78 Accepts]: Start accepts. Automaton has 5773 states and 6665 transitions. Word has length 289 [2020-10-28 13:05:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:07,447 INFO L481 AbstractCegarLoop]: Abstraction has 5773 states and 6665 transitions. [2020-10-28 13:05:07,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:05:07,447 INFO L276 IsEmpty]: Start isEmpty. Operand 5773 states and 6665 transitions. [2020-10-28 13:05:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-28 13:05:07,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:07,455 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:07,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:05:07,456 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:07,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:07,458 INFO L82 PathProgramCache]: Analyzing trace with hash -113267975, now seen corresponding path program 1 times [2020-10-28 13:05:07,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:07,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663707260] [2020-10-28 13:05:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:07,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:07,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:09,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:12,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:12,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 351 [2020-10-28 13:05:12,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:05:12,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 13:05:12,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:12,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:05:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:05:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-28 13:05:12,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:05:12,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:12,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:12,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:12,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:12,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:12,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 13:05:12,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:12,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:05:12,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:12,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:12,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:13,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:13,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 13:05:13,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:13,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-28 13:05:13,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:13,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:05:13,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-28 13:05:13,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:13,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-28 13:05:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:13,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:13,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:13,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 13:05:13,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:13,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 13:05:13,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:13,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:13,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:13,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 13:05:13,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:13,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 88 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 13:05:13,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663707260] [2020-10-28 13:05:13,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:13,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:05:13,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265325404] [2020-10-28 13:05:13,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:05:13,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:13,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:05:13,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:05:13,960 INFO L87 Difference]: Start difference. First operand 5773 states and 6665 transitions. Second operand 7 states. [2020-10-28 13:05:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:22,002 INFO L93 Difference]: Finished difference Result 11309 states and 13169 transitions. [2020-10-28 13:05:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 13:05:22,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 337 [2020-10-28 13:05:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:22,035 INFO L225 Difference]: With dead ends: 11309 [2020-10-28 13:05:22,035 INFO L226 Difference]: Without dead ends: 5849 [2020-10-28 13:05:22,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-28 13:05:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2020-10-28 13:05:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 5778. [2020-10-28 13:05:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5778 states. [2020-10-28 13:05:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5778 states to 5778 states and 6670 transitions. [2020-10-28 13:05:22,220 INFO L78 Accepts]: Start accepts. Automaton has 5778 states and 6670 transitions. Word has length 337 [2020-10-28 13:05:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:22,221 INFO L481 AbstractCegarLoop]: Abstraction has 5778 states and 6670 transitions. [2020-10-28 13:05:22,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:05:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5778 states and 6670 transitions. [2020-10-28 13:05:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-10-28 13:05:22,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:22,231 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:22,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:05:22,232 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:22,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1878082494, now seen corresponding path program 1 times [2020-10-28 13:05:22,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:22,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630989792] [2020-10-28 13:05:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:22,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:24,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:24,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-10-28 13:05:24,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:05:24,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2370 [2020-10-28 13:05:24,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:24,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:24,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:05:24,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 13:05:24,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:24,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:24,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:24,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:24,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:24,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:24,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:05:24,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:24,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:24,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:24,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:24,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:24,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:24,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:25,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:25,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:25,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:05:25,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:25,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-28 13:05:25,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:25,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:25,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:25,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:25,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:05:25,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:25,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:05:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:25,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:25,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:25,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 13:05:25,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:25,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-28 13:05:25,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:25,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:25,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:25,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:05:25,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 13:05:25,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:05:25,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630989792] [2020-10-28 13:05:25,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:25,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:05:25,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321526681] [2020-10-28 13:05:25,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:05:25,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:05:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:05:25,917 INFO L87 Difference]: Start difference. First operand 5778 states and 6670 transitions. Second operand 7 states. [2020-10-28 13:05:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:35,093 INFO L93 Difference]: Finished difference Result 13233 states and 15605 transitions. [2020-10-28 13:05:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:05:35,095 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 411 [2020-10-28 13:05:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:35,129 INFO L225 Difference]: With dead ends: 13233 [2020-10-28 13:05:35,129 INFO L226 Difference]: Without dead ends: 7768 [2020-10-28 13:05:35,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:05:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2020-10-28 13:05:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7718. [2020-10-28 13:05:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7718 states. [2020-10-28 13:05:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7718 states to 7718 states and 8833 transitions. [2020-10-28 13:05:35,365 INFO L78 Accepts]: Start accepts. Automaton has 7718 states and 8833 transitions. Word has length 411 [2020-10-28 13:05:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:35,366 INFO L481 AbstractCegarLoop]: Abstraction has 7718 states and 8833 transitions. [2020-10-28 13:05:35,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:05:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7718 states and 8833 transitions. [2020-10-28 13:05:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-10-28 13:05:35,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:35,377 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:35,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:05:35,378 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:35,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1392353088, now seen corresponding path program 1 times [2020-10-28 13:05:35,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:35,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274339215] [2020-10-28 13:05:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:35,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:35,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:38,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:38,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 451 [2020-10-28 13:05:38,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:05:38,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2913 [2020-10-28 13:05:38,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:38,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:38,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:38,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:05:38,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 13:05:38,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:38,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:38,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:38,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:38,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:38,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:38,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 13:05:38,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:38,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:38,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:38,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:38,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:38,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:38,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:38,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:39,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:39,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:05:39,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:39,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-28 13:05:39,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:39,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:39,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:39,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:39,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:05:39,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:39,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:05:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:39,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:39,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:39,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:05:39,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:39,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-28 13:05:39,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:39,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:05:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:05:39,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:05:40,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274339215] [2020-10-28 13:05:40,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:40,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:05:40,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434347108] [2020-10-28 13:05:40,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:05:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:05:40,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:05:40,115 INFO L87 Difference]: Start difference. First operand 7718 states and 8833 transitions. Second operand 7 states. [2020-10-28 13:05:50,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:50,971 INFO L93 Difference]: Finished difference Result 16430 states and 18788 transitions. [2020-10-28 13:05:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:05:50,973 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 437 [2020-10-28 13:05:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:51,004 INFO L225 Difference]: With dead ends: 16430 [2020-10-28 13:05:51,004 INFO L226 Difference]: Without dead ends: 9025 [2020-10-28 13:05:51,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:05:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9025 states. [2020-10-28 13:05:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9025 to 8963. [2020-10-28 13:05:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8963 states. [2020-10-28 13:05:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 10117 transitions. [2020-10-28 13:05:51,246 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 10117 transitions. Word has length 437 [2020-10-28 13:05:51,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:51,247 INFO L481 AbstractCegarLoop]: Abstraction has 8963 states and 10117 transitions. [2020-10-28 13:05:51,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:05:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 10117 transitions. [2020-10-28 13:05:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-10-28 13:05:51,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:51,258 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:51,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:05:51,259 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:51,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:51,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1794523704, now seen corresponding path program 1 times [2020-10-28 13:05:51,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:51,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013632352] [2020-10-28 13:05:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:51,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:52,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:52,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-10-28 13:05:52,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:52,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-28 13:05:52,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:52,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:05:52,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 13:05:52,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:52,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:52,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:52,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:52,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:52,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:52,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:05:52,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:52,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:52,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:52,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:52,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:52,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:52,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:52,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:52,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:52,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:05:52,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:52,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-28 13:05:52,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:52,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:52,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:52,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:52,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:05:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:52,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:52,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:52,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:05:52,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:52,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-28 13:05:52,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:52,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:52,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:52,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:52,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:05:52,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 13:05:53,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013632352] [2020-10-28 13:05:53,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:53,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:05:53,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237825263] [2020-10-28 13:05:53,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:05:53,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:53,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:05:53,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:05:53,098 INFO L87 Difference]: Start difference. First operand 8963 states and 10117 transitions. Second operand 5 states. [2020-10-28 13:06:01,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:01,305 INFO L93 Difference]: Finished difference Result 17736 states and 20543 transitions. [2020-10-28 13:06:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:06:01,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-10-28 13:06:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:01,347 INFO L225 Difference]: With dead ends: 17736 [2020-10-28 13:06:01,348 INFO L226 Difference]: Without dead ends: 11584 [2020-10-28 13:06:01,366 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 [2020-10-28 13:06:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11584 states. [2020-10-28 13:06:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11584 to 11555. [2020-10-28 13:06:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11555 states. [2020-10-28 13:06:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11555 states to 11555 states and 13338 transitions. [2020-10-28 13:06:01,631 INFO L78 Accepts]: Start accepts. Automaton has 11555 states and 13338 transitions. Word has length 449 [2020-10-28 13:06:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:01,633 INFO L481 AbstractCegarLoop]: Abstraction has 11555 states and 13338 transitions. [2020-10-28 13:06:01,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:06:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 11555 states and 13338 transitions. [2020-10-28 13:06:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-10-28 13:06:01,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:01,647 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:01,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:06:01,648 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:01,648 INFO L82 PathProgramCache]: Analyzing trace with hash 234454050, now seen corresponding path program 1 times [2020-10-28 13:06:01,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:01,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775607215] [2020-10-28 13:06:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:01,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:03,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:05,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:05,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 499 [2020-10-28 13:06:05,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:06:05,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3720 [2020-10-28 13:06:05,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:05,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 13:06:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:06:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 490 [2020-10-28 13:06:05,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:05,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:05,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:05,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:05,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:05,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:05,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 13:06:05,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:05,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:05,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:05,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:05,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:06:05,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:05,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:05,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:06,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:06,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:06,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:06,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-28 13:06:06,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:06,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:06,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:06,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 287 [2020-10-28 13:06:06,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:06,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:06,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:06,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:06,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 13:06:06,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:06,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-28 13:06:06,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:06,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 13:06:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-28 13:06:06,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:06:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 13:06:07,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775607215] [2020-10-28 13:06:07,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:07,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 13:06:07,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057670913] [2020-10-28 13:06:07,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 13:06:07,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:07,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 13:06:07,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 13:06:07,082 INFO L87 Difference]: Start difference. First operand 11555 states and 13338 transitions. Second operand 9 states. [2020-10-28 13:06:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:26,150 INFO L93 Difference]: Finished difference Result 23429 states and 28607 transitions. [2020-10-28 13:06:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 13:06:26,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 485 [2020-10-28 13:06:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:26,221 INFO L225 Difference]: With dead ends: 23429 [2020-10-28 13:06:26,221 INFO L226 Difference]: Without dead ends: 14061 [2020-10-28 13:06:26,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-28 13:06:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14061 states. [2020-10-28 13:06:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14061 to 12545. [2020-10-28 13:06:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12545 states. [2020-10-28 13:06:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12545 states to 12545 states and 14462 transitions. [2020-10-28 13:06:26,627 INFO L78 Accepts]: Start accepts. Automaton has 12545 states and 14462 transitions. Word has length 485 [2020-10-28 13:06:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:26,628 INFO L481 AbstractCegarLoop]: Abstraction has 12545 states and 14462 transitions. [2020-10-28 13:06:26,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 13:06:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 12545 states and 14462 transitions. [2020-10-28 13:06:26,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-10-28 13:06:26,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:26,636 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:26,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 13:06:26,636 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1066329357, now seen corresponding path program 1 times [2020-10-28 13:06:26,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:26,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212783677] [2020-10-28 13:06:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:26,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:27,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:28,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:29,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:30,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:30,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 537 [2020-10-28 13:06:30,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:06:30,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3692 [2020-10-28 13:06:30,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:30,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:30,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:06:30,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:06:30,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 13:06:30,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:30,742 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:06:30,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:30,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:30,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:30,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:30,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:30,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:06:30,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:30,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:30,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:30,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:30,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:30,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:30,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:30,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:30,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:30,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:30,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:30,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-28 13:06:30,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:30,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:30,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:31,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:31,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:31,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:31,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:31,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:31,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 13:06:31,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:31,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:31,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:31,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:31,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:06:31,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:31,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:06:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:31,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:31,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:31,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:31,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:06:31,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:06:31,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-28 13:06:31,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:31,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:31,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:31,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:31,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 13:06:31,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 268 proven. 5 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-28 13:06:31,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212783677] [2020-10-28 13:06:31,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:31,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:06:31,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946644418] [2020-10-28 13:06:31,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:06:31,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:31,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:06:31,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:06:31,733 INFO L87 Difference]: Start difference. First operand 12545 states and 14462 transitions. Second operand 7 states. [2020-10-28 13:06:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:43,065 INFO L93 Difference]: Finished difference Result 24842 states and 28716 transitions. [2020-10-28 13:06:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:06:43,067 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 521 [2020-10-28 13:06:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:43,104 INFO L225 Difference]: With dead ends: 24842 [2020-10-28 13:06:43,104 INFO L226 Difference]: Without dead ends: 12610 [2020-10-28 13:06:43,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:06:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12610 states. [2020-10-28 13:06:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12610 to 12539. [2020-10-28 13:06:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12539 states. [2020-10-28 13:06:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12539 states to 12539 states and 13792 transitions. [2020-10-28 13:06:43,402 INFO L78 Accepts]: Start accepts. Automaton has 12539 states and 13792 transitions. Word has length 521 [2020-10-28 13:06:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:43,404 INFO L481 AbstractCegarLoop]: Abstraction has 12539 states and 13792 transitions. [2020-10-28 13:06:43,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:06:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 12539 states and 13792 transitions. [2020-10-28 13:06:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2020-10-28 13:06:43,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:43,412 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:43,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 13:06:43,412 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1136777174, now seen corresponding path program 1 times [2020-10-28 13:06:43,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:43,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200348971] [2020-10-28 13:06:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:43,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:43,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:44,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:47,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:47,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 566 [2020-10-28 13:06:47,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:06:47,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4008 [2020-10-28 13:06:47,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:47,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:47,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:47,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:06:47,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 13:06:47,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:47,776 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:06:47,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:47,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:47,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:47,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:47,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:47,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:06:47,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:47,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:47,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:47,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:47,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:47,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:47,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:47,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:47,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 13:06:47,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:47,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:47,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:47,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:47,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:47,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:48,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:48,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:48,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:48,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:48,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:48,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 13:06:48,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:48,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:48,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:48,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:48,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:06:48,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:48,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:06:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:48,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:48,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:48,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 13:06:48,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:48,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-28 13:06:48,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:48,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 13:06:48,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 333 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 13:06:48,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200348971] [2020-10-28 13:06:48,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:48,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:06:48,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984106451] [2020-10-28 13:06:48,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:06:48,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:48,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:06:48,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:06:48,567 INFO L87 Difference]: Start difference. First operand 12539 states and 13792 transitions. Second operand 7 states. [2020-10-28 13:06:51,099 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:06:52,267 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:07:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:07:04,463 INFO L93 Difference]: Finished difference Result 27675 states and 31098 transitions. [2020-10-28 13:07:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:07:04,466 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 550 [2020-10-28 13:07:04,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:07:04,523 INFO L225 Difference]: With dead ends: 27675 [2020-10-28 13:07:04,524 INFO L226 Difference]: Without dead ends: 16074 [2020-10-28 13:07:04,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:07:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16074 states. [2020-10-28 13:07:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16074 to 15694. [2020-10-28 13:07:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15694 states. [2020-10-28 13:07:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15694 states to 15694 states and 17331 transitions. [2020-10-28 13:07:04,894 INFO L78 Accepts]: Start accepts. Automaton has 15694 states and 17331 transitions. Word has length 550 [2020-10-28 13:07:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:07:04,895 INFO L481 AbstractCegarLoop]: Abstraction has 15694 states and 17331 transitions. [2020-10-28 13:07:04,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:07:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 15694 states and 17331 transitions. [2020-10-28 13:07:04,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2020-10-28 13:07:04,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:07:04,913 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 13:07:04,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 13:07:04,913 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:07:04,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:07:04,915 INFO L82 PathProgramCache]: Analyzing trace with hash -917977894, now seen corresponding path program 1 times [2020-10-28 13:07:04,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:07:04,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378707763] [2020-10-28 13:07:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:07:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:05,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:05,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:07,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking...