/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=SHALLOWEST --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/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:28:33,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:28:33,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:28:33,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:28:33,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:28:33,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:28:33,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:28:33,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:28:33,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:28:33,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:28:33,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:28:33,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:28:33,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:28:33,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:28:33,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:28:33,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:28:33,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:28:33,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:28:33,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:28:33,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:28:33,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:28:33,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:28:33,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:28:33,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:28:33,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:28:33,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:28:33,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:28:33,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:28:33,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:28:33,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:28:33,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:28:33,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:28:33,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:28:33,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:28:33,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:28:33,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:28:33,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:28:33,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:28:33,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:28:33,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:28:33,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:28:33,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:28:33,372 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:28:33,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:28:33,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:28:33,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:28:33,375 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:28:33,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:28:33,375 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:28:33,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:28:33,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:28:33,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:28:33,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:28:33,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:28:33,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:28:33,377 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:28:33,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:28:33,377 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:28:33,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:28:33,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:28:33,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:28:33,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:28:33,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:28:33,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:28:33,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:28:33,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:28:33,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:28:33,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:28:33,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:28:33,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:28:33,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:28:33,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:28:33,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:28:33,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:28:33,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:28:33,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:28:33,818 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:28:33,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-10-27 01:28:33,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bdf593bf/437cca25280f4e1d81c7235852170001/FLAGfe6a4a236 [2020-10-27 01:28:34,562 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:28:34,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-10-27 01:28:34,574 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bdf593bf/437cca25280f4e1d81c7235852170001/FLAGfe6a4a236 [2020-10-27 01:28:34,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bdf593bf/437cca25280f4e1d81c7235852170001 [2020-10-27 01:28:34,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:28:34,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:28:34,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:28:34,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:28:34,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:28:34,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:28:34" (1/1) ... [2020-10-27 01:28:34,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcb6a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:34, skipping insertion in model container [2020-10-27 01:28:34,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:28:34" (1/1) ... [2020-10-27 01:28:34,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:28:34,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:28:35,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:28:35,178 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:28:35,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:28:35,217 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:28:35,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:35 WrapperNode [2020-10-27 01:28:35,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:28:35,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:28:35,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:28:35,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:28:35,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:35" (1/1) ... [2020-10-27 01:28:35,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:35" (1/1) ... [2020-10-27 01:28:35,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:35" (1/1) ... [2020-10-27 01:28:35,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:35" (1/1) ... [2020-10-27 01:28:35,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:35" (1/1) ... [2020-10-27 01:28:35,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:35" (1/1) ... [2020-10-27 01:28:35,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:35" (1/1) ... [2020-10-27 01:28:35,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:28:35,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:28:35,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:28:35,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:28:35,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:28:35,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:28:35,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:28:35,360 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:28:35,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:28:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:28:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:28:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:28:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:28:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:28:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:28:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:28:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:28:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:28:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:28:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:28:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:28:35,919 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:28:35,919 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:28:35,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:28:35 BoogieIcfgContainer [2020-10-27 01:28:35,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:28:35,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:28:35,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:28:35,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:28:35,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:28:34" (1/3) ... [2020-10-27 01:28:35,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420dd920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:28:35, skipping insertion in model container [2020-10-27 01:28:35,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:28:35" (2/3) ... [2020-10-27 01:28:35,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420dd920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:28:35, skipping insertion in model container [2020-10-27 01:28:35,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:28:35" (3/3) ... [2020-10-27 01:28:35,931 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-10-27 01:28:35,945 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:28:35,950 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:28:35,965 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:28:35,996 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:28:35,996 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:28:35,997 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:28:35,997 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:28:35,997 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:28:35,997 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:28:35,997 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:28:35,997 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:28:36,017 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 01:28:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:28:36,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:36,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:36,024 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:36,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2118099465, now seen corresponding path program 1 times [2020-10-27 01:28:36,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:36,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630731715] [2020-10-27 01:28:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:36,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:36,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:36,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:28:36,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:36,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-27 01:28:36,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:36,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:28:36,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:28:36,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:28:36,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:36,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:36,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:36,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:36,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:36,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:28:36,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:36,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:36,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:36,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:36,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:36,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630731715] [2020-10-27 01:28:36,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:36,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:36,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340662244] [2020-10-27 01:28:36,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:36,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:36,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:36,657 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-27 01:28:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:37,006 INFO L93 Difference]: Finished difference Result 68 states and 109 transitions. [2020-10-27 01:28:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:37,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 01:28:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:37,039 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:28:37,039 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:28:37,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:28:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-27 01:28:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:28:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 59 transitions. [2020-10-27 01:28:37,117 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 59 transitions. Word has length 18 [2020-10-27 01:28:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:37,118 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 59 transitions. [2020-10-27 01:28:37,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 59 transitions. [2020-10-27 01:28:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:28:37,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:37,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:37,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:28:37,122 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:37,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:37,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1783840821, now seen corresponding path program 1 times [2020-10-27 01:28:37,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:37,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108020112] [2020-10-27 01:28:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:37,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:37,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:37,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:28:37,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:37,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 01:28:37,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:37,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:37,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:28:37,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:28:37,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:37,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:37,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:37,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:37,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:37,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:37,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:28:37,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:37,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:37,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:37,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:37,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:28:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:37,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108020112] [2020-10-27 01:28:37,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:37,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:37,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094899485] [2020-10-27 01:28:37,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:37,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:37,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:37,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:37,472 INFO L87 Difference]: Start difference. First operand 36 states and 59 transitions. Second operand 4 states. [2020-10-27 01:28:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:37,646 INFO L93 Difference]: Finished difference Result 79 states and 135 transitions. [2020-10-27 01:28:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:37,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 01:28:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:37,648 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:28:37,648 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:28:37,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:28:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 01:28:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:28:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 79 transitions. [2020-10-27 01:28:37,661 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 79 transitions. Word has length 18 [2020-10-27 01:28:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:37,662 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 79 transitions. [2020-10-27 01:28:37,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 79 transitions. [2020-10-27 01:28:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:28:37,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:37,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:37,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:28:37,664 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1229925405, now seen corresponding path program 1 times [2020-10-27 01:28:37,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:37,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906815659] [2020-10-27 01:28:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:37,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:37,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:37,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:37,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:28:37,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:37,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-27 01:28:37,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:37,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:37,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:28:37,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:28:37,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:37,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:37,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:37,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:37,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:37,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:37,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:28:37,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:37,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:37,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:37,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:37,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:37,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906815659] [2020-10-27 01:28:37,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:37,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:37,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480745598] [2020-10-27 01:28:37,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:37,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:37,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:37,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:37,941 INFO L87 Difference]: Start difference. First operand 48 states and 79 transitions. Second operand 4 states. [2020-10-27 01:28:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:38,077 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2020-10-27 01:28:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:38,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 01:28:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:38,079 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:28:38,079 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:28:38,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:28:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 01:28:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:28:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 81 transitions. [2020-10-27 01:28:38,090 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 81 transitions. Word has length 19 [2020-10-27 01:28:38,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:38,091 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 81 transitions. [2020-10-27 01:28:38,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:38,091 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 81 transitions. [2020-10-27 01:28:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:28:38,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:38,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:38,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:28:38,093 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:38,093 INFO L82 PathProgramCache]: Analyzing trace with hash -528860827, now seen corresponding path program 1 times [2020-10-27 01:28:38,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:38,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266657671] [2020-10-27 01:28:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:38,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:38,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:28:38,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:38,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 01:28:38,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:38,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:38,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:28:38,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:28:38,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:38,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:38,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:38,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:38,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:38,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:28:38,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:38,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:38,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:38,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:38,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:38,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266657671] [2020-10-27 01:28:38,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:38,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:38,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586528415] [2020-10-27 01:28:38,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:38,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:38,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:38,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:38,211 INFO L87 Difference]: Start difference. First operand 51 states and 81 transitions. Second operand 4 states. [2020-10-27 01:28:38,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:38,373 INFO L93 Difference]: Finished difference Result 131 states and 218 transitions. [2020-10-27 01:28:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:38,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 01:28:38,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:38,376 INFO L225 Difference]: With dead ends: 131 [2020-10-27 01:28:38,376 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:28:38,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:28:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 01:28:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:28:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 142 transitions. [2020-10-27 01:28:38,391 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 142 transitions. Word has length 19 [2020-10-27 01:28:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:38,391 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 142 transitions. [2020-10-27 01:28:38,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 142 transitions. [2020-10-27 01:28:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:28:38,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:38,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:28:38,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:28:38,393 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:38,394 INFO L82 PathProgramCache]: Analyzing trace with hash -135833817, now seen corresponding path program 1 times [2020-10-27 01:28:38,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:38,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879693582] [2020-10-27 01:28:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:38,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:38,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:28:38,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:38,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 01:28:38,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:38,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:38,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:28:38,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:28:38,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:38,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:38,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:38,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:38,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:38,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:28:38,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:38,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:38,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:38,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879693582] [2020-10-27 01:28:38,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:38,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:38,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577222717] [2020-10-27 01:28:38,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:38,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:38,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:38,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:38,507 INFO L87 Difference]: Start difference. First operand 88 states and 142 transitions. Second operand 4 states. [2020-10-27 01:28:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:38,628 INFO L93 Difference]: Finished difference Result 112 states and 181 transitions. [2020-10-27 01:28:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:38,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 01:28:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:38,630 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:28:38,630 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:28:38,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:28:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2020-10-27 01:28:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:28:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 140 transitions. [2020-10-27 01:28:38,642 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 140 transitions. Word has length 19 [2020-10-27 01:28:38,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:38,643 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 140 transitions. [2020-10-27 01:28:38,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 140 transitions. [2020-10-27 01:28:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:28:38,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:38,644 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] [2020-10-27 01:28:38,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:28:38,645 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash 791842688, now seen corresponding path program 1 times [2020-10-27 01:28:38,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:38,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686076696] [2020-10-27 01:28:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:38,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:38,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:28:38,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:38,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 01:28:38,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:38,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:38,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:28:38,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:28:38,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:38,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:38,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:38,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:38,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:38,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:28:38,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:38,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:38,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:38,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:38,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:38,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686076696] [2020-10-27 01:28:38,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:38,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:38,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396920532] [2020-10-27 01:28:38,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:38,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:38,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:38,795 INFO L87 Difference]: Start difference. First operand 88 states and 140 transitions. Second operand 4 states. [2020-10-27 01:28:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:38,913 INFO L93 Difference]: Finished difference Result 156 states and 253 transitions. [2020-10-27 01:28:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:38,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 01:28:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:38,915 INFO L225 Difference]: With dead ends: 156 [2020-10-27 01:28:38,915 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 01:28:38,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 01:28:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-10-27 01:28:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:28:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 190 transitions. [2020-10-27 01:28:38,929 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 190 transitions. Word has length 20 [2020-10-27 01:28:38,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:38,930 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 190 transitions. [2020-10-27 01:28:38,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:38,930 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 190 transitions. [2020-10-27 01:28:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:28:38,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:38,931 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] [2020-10-27 01:28:38,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:28:38,932 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:38,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash 398815678, now seen corresponding path program 1 times [2020-10-27 01:28:38,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:38,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015453407] [2020-10-27 01:28:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:38,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:39,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:28:39,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:39,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 01:28:39,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:39,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:39,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:28:39,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:28:39,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:39,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:39,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:39,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:39,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:39,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:28:39,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:39,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:39,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015453407] [2020-10-27 01:28:39,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:39,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:39,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347871601] [2020-10-27 01:28:39,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:39,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:39,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:39,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:39,076 INFO L87 Difference]: Start difference. First operand 120 states and 190 transitions. Second operand 4 states. [2020-10-27 01:28:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:39,200 INFO L93 Difference]: Finished difference Result 272 states and 437 transitions. [2020-10-27 01:28:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:39,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 01:28:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:39,202 INFO L225 Difference]: With dead ends: 272 [2020-10-27 01:28:39,202 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 01:28:39,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 01:28:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-27 01:28:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 01:28:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 248 transitions. [2020-10-27 01:28:39,219 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 248 transitions. Word has length 20 [2020-10-27 01:28:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:39,219 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 248 transitions. [2020-10-27 01:28:39,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 248 transitions. [2020-10-27 01:28:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:28:39,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:39,221 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] [2020-10-27 01:28:39,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:28:39,222 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:39,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1216010736, now seen corresponding path program 1 times [2020-10-27 01:28:39,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:39,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352745338] [2020-10-27 01:28:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:39,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:39,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:28:39,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:39,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 01:28:39,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:28:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:28:39,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:39,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:39,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:39,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:39,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:39,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:28:39,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:39,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:39,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352745338] [2020-10-27 01:28:39,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:39,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:39,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256586561] [2020-10-27 01:28:39,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:39,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:39,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:39,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:39,385 INFO L87 Difference]: Start difference. First operand 160 states and 248 transitions. Second operand 4 states. [2020-10-27 01:28:39,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:39,507 INFO L93 Difference]: Finished difference Result 242 states and 375 transitions. [2020-10-27 01:28:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:39,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 01:28:39,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:39,510 INFO L225 Difference]: With dead ends: 242 [2020-10-27 01:28:39,510 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 01:28:39,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 01:28:39,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-27 01:28:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 01:28:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 252 transitions. [2020-10-27 01:28:39,522 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 252 transitions. Word has length 21 [2020-10-27 01:28:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:39,522 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 252 transitions. [2020-10-27 01:28:39,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 252 transitions. [2020-10-27 01:28:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:28:39,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:39,524 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] [2020-10-27 01:28:39,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:28:39,525 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash -514946158, now seen corresponding path program 1 times [2020-10-27 01:28:39,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:39,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508317268] [2020-10-27 01:28:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:39,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:39,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:28:39,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:39,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 01:28:39,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:39,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:39,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:28:39,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:28:39,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:28:39,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:39,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:39,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:39,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:39,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:28:39,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508317268] [2020-10-27 01:28:39,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:39,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410159755] [2020-10-27 01:28:39,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:39,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:39,681 INFO L87 Difference]: Start difference. First operand 166 states and 252 transitions. Second operand 4 states. [2020-10-27 01:28:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:39,814 INFO L93 Difference]: Finished difference Result 286 states and 439 transitions. [2020-10-27 01:28:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:39,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 01:28:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:39,817 INFO L225 Difference]: With dead ends: 286 [2020-10-27 01:28:39,817 INFO L226 Difference]: Without dead ends: 283 [2020-10-27 01:28:39,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-27 01:28:39,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 234. [2020-10-27 01:28:39,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 01:28:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 348 transitions. [2020-10-27 01:28:39,830 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 348 transitions. Word has length 21 [2020-10-27 01:28:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:39,830 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 348 transitions. [2020-10-27 01:28:39,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 348 transitions. [2020-10-27 01:28:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:28:39,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:39,832 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] [2020-10-27 01:28:39,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:28:39,833 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:39,833 INFO L82 PathProgramCache]: Analyzing trace with hash -907973168, now seen corresponding path program 1 times [2020-10-27 01:28:39,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:39,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451189321] [2020-10-27 01:28:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:39,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:28:39,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:39,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 01:28:39,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:28:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:28:39,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:39,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:39,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:39,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:39,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:39,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:39,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:28:39,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:39,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:39,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:39,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:39,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:39,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451189321] [2020-10-27 01:28:39,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:39,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:39,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903538064] [2020-10-27 01:28:39,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:39,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:39,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:39,931 INFO L87 Difference]: Start difference. First operand 234 states and 348 transitions. Second operand 4 states. [2020-10-27 01:28:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:40,071 INFO L93 Difference]: Finished difference Result 526 states and 783 transitions. [2020-10-27 01:28:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:40,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 01:28:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:40,075 INFO L225 Difference]: With dead ends: 526 [2020-10-27 01:28:40,075 INFO L226 Difference]: Without dead ends: 307 [2020-10-27 01:28:40,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-27 01:28:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-10-27 01:28:40,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-27 01:28:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 440 transitions. [2020-10-27 01:28:40,096 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 440 transitions. Word has length 21 [2020-10-27 01:28:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:40,096 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 440 transitions. [2020-10-27 01:28:40,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 440 transitions. [2020-10-27 01:28:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:28:40,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:40,103 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] [2020-10-27 01:28:40,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:28:40,103 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1223218569, now seen corresponding path program 1 times [2020-10-27 01:28:40,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:40,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267676264] [2020-10-27 01:28:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:40,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:40,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:28:40,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:40,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 01:28:40,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:28:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:28:40,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:40,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:40,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:40,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:40,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:40,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:28:40,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:40,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:40,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:40,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:40,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:40,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267676264] [2020-10-27 01:28:40,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:40,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:40,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441588407] [2020-10-27 01:28:40,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:40,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:40,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:40,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:40,306 INFO L87 Difference]: Start difference. First operand 306 states and 440 transitions. Second operand 4 states. [2020-10-27 01:28:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:40,454 INFO L93 Difference]: Finished difference Result 458 states and 655 transitions. [2020-10-27 01:28:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:40,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 01:28:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:40,456 INFO L225 Difference]: With dead ends: 458 [2020-10-27 01:28:40,457 INFO L226 Difference]: Without dead ends: 315 [2020-10-27 01:28:40,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-27 01:28:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2020-10-27 01:28:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-27 01:28:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 440 transitions. [2020-10-27 01:28:40,473 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 440 transitions. Word has length 22 [2020-10-27 01:28:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:40,473 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 440 transitions. [2020-10-27 01:28:40,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 440 transitions. [2020-10-27 01:28:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:28:40,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:40,474 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] [2020-10-27 01:28:40,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:28:40,475 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1924283147, now seen corresponding path program 1 times [2020-10-27 01:28:40,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:40,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048116856] [2020-10-27 01:28:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:40,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:40,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:28:40,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:40,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 01:28:40,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:28:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:28:40,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:40,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:40,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:40,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:40,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:40,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:28:40,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:40,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:40,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:40,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:40,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:40,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048116856] [2020-10-27 01:28:40,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:40,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:40,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312714699] [2020-10-27 01:28:40,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:40,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:40,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:40,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:40,568 INFO L87 Difference]: Start difference. First operand 314 states and 440 transitions. Second operand 4 states. [2020-10-27 01:28:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:40,703 INFO L93 Difference]: Finished difference Result 526 states and 739 transitions. [2020-10-27 01:28:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:40,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 01:28:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:40,707 INFO L225 Difference]: With dead ends: 526 [2020-10-27 01:28:40,707 INFO L226 Difference]: Without dead ends: 523 [2020-10-27 01:28:40,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-27 01:28:40,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 458. [2020-10-27 01:28:40,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-27 01:28:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 624 transitions. [2020-10-27 01:28:40,730 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 624 transitions. Word has length 22 [2020-10-27 01:28:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:40,730 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 624 transitions. [2020-10-27 01:28:40,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 624 transitions. [2020-10-27 01:28:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:28:40,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:40,732 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] [2020-10-27 01:28:40,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:28:40,732 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:40,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1531256137, now seen corresponding path program 1 times [2020-10-27 01:28:40,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:40,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772419862] [2020-10-27 01:28:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:40,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:40,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:28:40,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:40,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:28:40,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:28:40,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:28:40,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:40,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:40,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:40,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:40,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:40,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:40,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:28:40,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:40,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:40,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:40,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:40,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:40,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772419862] [2020-10-27 01:28:40,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:40,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:40,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119019436] [2020-10-27 01:28:40,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:40,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:40,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:40,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:40,829 INFO L87 Difference]: Start difference. First operand 458 states and 624 transitions. Second operand 4 states. [2020-10-27 01:28:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:40,983 INFO L93 Difference]: Finished difference Result 1022 states and 1379 transitions. [2020-10-27 01:28:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:40,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 01:28:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:40,987 INFO L225 Difference]: With dead ends: 1022 [2020-10-27 01:28:40,987 INFO L226 Difference]: Without dead ends: 587 [2020-10-27 01:28:40,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:40,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-27 01:28:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 586. [2020-10-27 01:28:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-27 01:28:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2020-10-27 01:28:41,019 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 22 [2020-10-27 01:28:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:41,020 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2020-10-27 01:28:41,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2020-10-27 01:28:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:28:41,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:41,021 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] [2020-10-27 01:28:41,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:28:41,022 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:41,023 INFO L82 PathProgramCache]: Analyzing trace with hash -470073733, now seen corresponding path program 1 times [2020-10-27 01:28:41,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:41,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220138334] [2020-10-27 01:28:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:41,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:41,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:41,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:41,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:28:41,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:28:41,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 01:28:41,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:41,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:41,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:28:41,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:28:41,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:41,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:41,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:41,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:41,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:41,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:41,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:41,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:41,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:41,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220138334] [2020-10-27 01:28:41,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:41,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:41,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065111270] [2020-10-27 01:28:41,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:41,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:41,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:41,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:41,167 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand 4 states. [2020-10-27 01:28:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:41,291 INFO L93 Difference]: Finished difference Result 878 states and 1131 transitions. [2020-10-27 01:28:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:41,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 01:28:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:41,295 INFO L225 Difference]: With dead ends: 878 [2020-10-27 01:28:41,295 INFO L226 Difference]: Without dead ends: 603 [2020-10-27 01:28:41,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-27 01:28:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 602. [2020-10-27 01:28:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-27 01:28:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 760 transitions. [2020-10-27 01:28:41,351 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 760 transitions. Word has length 23 [2020-10-27 01:28:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:41,351 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 760 transitions. [2020-10-27 01:28:41,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 760 transitions. [2020-10-27 01:28:41,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:28:41,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:41,353 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] [2020-10-27 01:28:41,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:28:41,353 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash 230990845, now seen corresponding path program 1 times [2020-10-27 01:28:41,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:41,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852331078] [2020-10-27 01:28:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:41,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:41,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:28:41,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:41,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:28:41,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:41,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:41,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:28:41,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:28:41,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:41,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:41,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:41,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:41,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:41,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:41,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:41,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:41,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:41,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:41,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:41,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:41,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852331078] [2020-10-27 01:28:41,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:41,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:41,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051646513] [2020-10-27 01:28:41,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:41,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:41,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:41,457 INFO L87 Difference]: Start difference. First operand 602 states and 760 transitions. Second operand 4 states. [2020-10-27 01:28:41,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:41,601 INFO L93 Difference]: Finished difference Result 973 states and 1210 transitions. [2020-10-27 01:28:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:41,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 01:28:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:41,607 INFO L225 Difference]: With dead ends: 973 [2020-10-27 01:28:41,607 INFO L226 Difference]: Without dead ends: 970 [2020-10-27 01:28:41,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-27 01:28:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 906. [2020-10-27 01:28:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2020-10-27 01:28:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1112 transitions. [2020-10-27 01:28:41,677 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1112 transitions. Word has length 23 [2020-10-27 01:28:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:41,677 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 1112 transitions. [2020-10-27 01:28:41,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1112 transitions. [2020-10-27 01:28:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:28:41,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:28:41,679 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] [2020-10-27 01:28:41,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:28:41,680 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:28:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:28:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash -162036165, now seen corresponding path program 1 times [2020-10-27 01:28:41,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:28:41,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235218971] [2020-10-27 01:28:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:28:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:41,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:41,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:41,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:28:41,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:41,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 01:28:41,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:28:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:28:41,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:28:41,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:41,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:28:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:28:41,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:28:41,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:28:41,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:28:41,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:28:41,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:28:41,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:28:41,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:28:41,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:28:41,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:28:41,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:28:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:28:41,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235218971] [2020-10-27 01:28:41,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:28:41,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:28:41,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282857288] [2020-10-27 01:28:41,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:28:41,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:28:41,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:28:41,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:28:41,769 INFO L87 Difference]: Start difference. First operand 906 states and 1112 transitions. Second operand 4 states. [2020-10-27 01:28:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:28:41,939 INFO L93 Difference]: Finished difference Result 1994 states and 2392 transitions. [2020-10-27 01:28:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:28:41,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 01:28:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:28:41,942 INFO L225 Difference]: With dead ends: 1994 [2020-10-27 01:28:41,942 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 01:28:41,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:28:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 01:28:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 01:28:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 01:28:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 01:28:41,948 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-27 01:28:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:28:41,948 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 01:28:41,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:28:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 01:28:41,949 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 01:28:41,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:28:41,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 01:28:42,894 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 32 [2020-10-27 01:28:42,941 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 01:28:42,942 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 01:28:42,942 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 01:28:42,942 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 01:28:42,942 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:28:42,943 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-27 01:28:42,943 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:28:42,943 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:28:42,943 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 01:28:42,943 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 01:28:42,943 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:28:42,943 INFO L274 CegarLoopResult]: For program point L60-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,943 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 109) no Hoare annotation was computed. [2020-10-27 01:28:42,943 INFO L274 CegarLoopResult]: For program point L85(line 85) no Hoare annotation was computed. [2020-10-27 01:28:42,944 INFO L274 CegarLoopResult]: For program point L52-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,944 INFO L274 CegarLoopResult]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,944 INFO L274 CegarLoopResult]: For program point L95(line 95) no Hoare annotation was computed. [2020-10-27 01:28:42,944 INFO L274 CegarLoopResult]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,944 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 109) no Hoare annotation was computed. [2020-10-27 01:28:42,944 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 109) the Hoare annotation is: true [2020-10-27 01:28:42,944 INFO L274 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-10-27 01:28:42,944 INFO L277 CegarLoopResult]: At program point L105(lines 7 109) the Hoare annotation is: true [2020-10-27 01:28:42,944 INFO L274 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-10-27 01:28:42,945 INFO L274 CegarLoopResult]: For program point L64-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,945 INFO L274 CegarLoopResult]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,945 INFO L274 CegarLoopResult]: For program point L56-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,945 INFO L274 CegarLoopResult]: For program point L48(lines 48 50) no Hoare annotation was computed. [2020-10-27 01:28:42,945 INFO L274 CegarLoopResult]: For program point L48-2(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,946 INFO L274 CegarLoopResult]: For program point L90(line 90) no Hoare annotation was computed. [2020-10-27 01:28:42,946 INFO L274 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-10-27 01:28:42,947 INFO L274 CegarLoopResult]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,948 INFO L277 CegarLoopResult]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2020-10-27 01:28:42,948 INFO L274 CegarLoopResult]: For program point L75(line 75) no Hoare annotation was computed. [2020-10-27 01:28:42,948 INFO L274 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-10-27 01:28:42,949 INFO L270 CegarLoopResult]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2020-10-27 01:28:42,949 INFO L274 CegarLoopResult]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,949 INFO L274 CegarLoopResult]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2020-10-27 01:28:42,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:28:42 BoogieIcfgContainer [2020-10-27 01:28:42,963 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:28:42,966 INFO L168 Benchmark]: Toolchain (without parser) took 8020.20 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 129.0 MB in the beginning and 175.9 MB in the end (delta: -46.9 MB). Peak memory consumption was 123.3 MB. Max. memory is 8.0 GB. [2020-10-27 01:28:42,966 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 153.1 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:28:42,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.61 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 118.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:28:42,978 INFO L168 Benchmark]: Boogie Preprocessor took 40.59 ms. Allocated memory is still 153.1 MB. Free memory was 118.6 MB in the beginning and 117.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:28:42,980 INFO L168 Benchmark]: RCFGBuilder took 661.03 ms. Allocated memory is still 153.1 MB. Free memory was 117.0 MB in the beginning and 133.4 MB in the end (delta: -16.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:28:42,981 INFO L168 Benchmark]: TraceAbstraction took 7039.96 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 132.9 MB in the beginning and 175.9 MB in the end (delta: -43.0 MB). Peak memory consumption was 126.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:28:42,989 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 153.1 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.61 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 118.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.59 ms. Allocated memory is still 153.1 MB. Free memory was 118.6 MB in the beginning and 117.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 661.03 ms. Allocated memory is still 153.1 MB. Free memory was 117.0 MB in the beginning and 133.4 MB in the end (delta: -16.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7039.96 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 132.9 MB in the beginning and 175.9 MB in the end (delta: -43.0 MB). Peak memory consumption was 126.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.9s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 893 SDtfs, 1206 SDslu, 125 SDs, 0 SdLazy, 644 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=906occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 254 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 90 NumberOfFragments, 38 HoareAnnotationTreeSize, 23 FomulaSimplifications, 212294 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 20197 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...