/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/condm.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:38:09,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:38:09,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:38:09,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:38:09,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:38:09,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:38:09,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:38:09,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:38:09,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:38:09,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:38:09,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:38:09,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:38:09,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:38:09,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:38:09,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:38:09,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:38:09,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:38:09,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:38:09,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:38:09,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:38:09,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:38:09,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:38:09,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:38:09,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:38:09,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:38:09,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:38:09,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:38:09,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:38:09,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:38:09,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:38:09,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:38:09,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:38:09,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:38:09,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:38:09,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:38:09,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:38:09,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:38:09,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:38:09,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:38:09,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:38:09,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:38:09,965 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 14:38:09,993 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:38:09,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:38:09,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:38:09,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:38:09,995 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:38:09,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:38:09,996 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:38:09,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:38:09,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:38:09,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:38:09,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:38:09,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:38:09,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:38:09,998 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:38:09,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:38:09,999 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:38:09,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:38:09,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:38:09,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:38:10,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:38:10,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:38:10,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:38:10,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:38:10,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:38:10,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:38:10,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:38:10,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:38:10,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:38:10,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:38:10,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:38:10,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:38:10,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:38:10,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:38:10,431 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:38:10,432 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:38:10,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condm.c [2020-10-27 14:38:10,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/136f4410b/f9881a1b980b4bd18fdb9bb184dcfa3e/FLAG24d6c0f7a [2020-10-27 14:38:11,166 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:38:11,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condm.c [2020-10-27 14:38:11,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/136f4410b/f9881a1b980b4bd18fdb9bb184dcfa3e/FLAG24d6c0f7a [2020-10-27 14:38:11,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/136f4410b/f9881a1b980b4bd18fdb9bb184dcfa3e [2020-10-27 14:38:11,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:38:11,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:38:11,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:38:11,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:38:11,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:38:11,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:38:11" (1/1) ... [2020-10-27 14:38:11,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a4f94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11, skipping insertion in model container [2020-10-27 14:38:11,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:38:11" (1/1) ... [2020-10-27 14:38:11,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:38:11,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:38:11,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:38:11,743 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:38:11,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:38:11,784 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:38:11,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11 WrapperNode [2020-10-27 14:38:11,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:38:11,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:38:11,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:38:11,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:38:11,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11" (1/1) ... [2020-10-27 14:38:11,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11" (1/1) ... [2020-10-27 14:38:11,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11" (1/1) ... [2020-10-27 14:38:11,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11" (1/1) ... [2020-10-27 14:38:11,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11" (1/1) ... [2020-10-27 14:38:11,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11" (1/1) ... [2020-10-27 14:38:11,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11" (1/1) ... [2020-10-27 14:38:11,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:38:11,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:38:11,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:38:11,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:38:11,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11" (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 14:38:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:38:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:38:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:38:11,923 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:38:11,923 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:38:11,923 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:38:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:38:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:38:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:38:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:38:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:38:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:38:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:38:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:38:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:38:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:38:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:38:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:38:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:38:11,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:38:11,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:38:11,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:38:12,342 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:38:12,343 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:38:12,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:38:12 BoogieIcfgContainer [2020-10-27 14:38:12,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:38:12,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:38:12,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:38:12,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:38:12,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:38:11" (1/3) ... [2020-10-27 14:38:12,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afff318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:38:12, skipping insertion in model container [2020-10-27 14:38:12,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:11" (2/3) ... [2020-10-27 14:38:12,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afff318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:38:12, skipping insertion in model container [2020-10-27 14:38:12,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:38:12" (3/3) ... [2020-10-27 14:38:12,380 INFO L111 eAbstractionObserver]: Analyzing ICFG condm.c [2020-10-27 14:38:12,395 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:38:12,400 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:38:12,415 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:38:12,448 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:38:12,448 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:38:12,449 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:38:12,449 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:38:12,449 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:38:12,449 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:38:12,449 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:38:12,449 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:38:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-27 14:38:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:38:12,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:12,475 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 14:38:12,476 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:12,482 INFO L82 PathProgramCache]: Analyzing trace with hash -603566119, now seen corresponding path program 1 times [2020-10-27 14:38:12,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:12,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006815063] [2020-10-27 14:38:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:12,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:12,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:12,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:12,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:13,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:38:13,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:38:13,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 961 [2020-10-27 14:38:13,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:13,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:13,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:38:13,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:13,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 14:38:13,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:13,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:13,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:13,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:13,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:38:13,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:13,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:13,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:13,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:13,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:38:13,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:13,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:13,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:13,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:38:13,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:38:13,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:13,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:13,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:38:13,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:13,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:38:13,819 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 14:38:13,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006815063] [2020-10-27 14:38:13,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:38:13,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:38:13,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181773230] [2020-10-27 14:38:13,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:38:13,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:38:13,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:38:13,847 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-27 14:38:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:14,030 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-27 14:38:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:38:14,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-27 14:38:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:14,041 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:38:14,041 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:38:14,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:38:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:38:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 14:38:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:38:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-27 14:38:14,093 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-27 14:38:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:14,093 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-27 14:38:14,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:38:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-27 14:38:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:38:14,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:14,095 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 14:38:14,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:38:14,096 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:14,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:14,097 INFO L82 PathProgramCache]: Analyzing trace with hash 689239426, now seen corresponding path program 1 times [2020-10-27 14:38:14,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:14,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552072180] [2020-10-27 14:38:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:14,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:14,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:38:14,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:38:14,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-27 14:38:14,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:14,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:38:14,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:38:14,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:38:14,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:14,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:14,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:14,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:14,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:14,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:38:14,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:14,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:14,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:14,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:14,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:14,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:14,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:14,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:14,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:14,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:38:14,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:14,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:14,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:14,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:14,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:14,951 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 14:38:14,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552072180] [2020-10-27 14:38:14,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:38:14,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:38:14,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148915260] [2020-10-27 14:38:14,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:38:14,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:14,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:38:14,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:38:14,956 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 6 states. [2020-10-27 14:38:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:15,345 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-10-27 14:38:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:38:15,346 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 14:38:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:15,349 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:38:15,349 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:38:15,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:38:15,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:38:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-10-27 14:38:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:38:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-27 14:38:15,364 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 23 [2020-10-27 14:38:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:15,365 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-27 14:38:15,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:38:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-27 14:38:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 14:38:15,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:15,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:15,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:38:15,367 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:15,367 INFO L82 PathProgramCache]: Analyzing trace with hash 493588519, now seen corresponding path program 1 times [2020-10-27 14:38:15,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:15,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580703359] [2020-10-27 14:38:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:15,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:15,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:15,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:15,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:15,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:16,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:16,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:20,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:20,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 14:38:20,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:38:20,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4961 [2020-10-27 14:38:20,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:38:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:38:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:38:20,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:20,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:20,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:20,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:20,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:20,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:20,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:38:20,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:20,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:20,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:20,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:20,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:38:20,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:20,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:20,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:20,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:20,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:20,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:20,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:20,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:38:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:38:20,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580703359] [2020-10-27 14:38:20,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:20,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:38:20,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180929553] [2020-10-27 14:38:20,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:38:20,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:20,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:38:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:38:20,664 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 8 states. [2020-10-27 14:38:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:21,211 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-27 14:38:21,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:38:21,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-27 14:38:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:21,217 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:38:21,218 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 14:38:21,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:38:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 14:38:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-10-27 14:38:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:38:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-27 14:38:21,241 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 28 [2020-10-27 14:38:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:21,243 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-27 14:38:21,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:38:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-27 14:38:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 14:38:21,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:21,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:21,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:38:21,245 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash 100561509, now seen corresponding path program 1 times [2020-10-27 14:38:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:21,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757707555] [2020-10-27 14:38:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:21,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:21,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:21,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:22,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:22,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 14:38:22,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:38:22,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-10-27 14:38:22,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:22,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:38:22,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:38:22,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:38:22,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:22,726 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-10-27 14:38:22,943 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2020-10-27 14:38:23,091 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-27 14:38:23,235 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-10-27 14:38:23,522 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2020-10-27 14:38:23,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:23,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:23,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:23,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:23,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:23,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:23,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:23,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:23,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:23,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:23,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:23,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:23,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:23,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:23,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:23,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:23,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:23,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:23,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:23,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:38:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:38:23,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757707555] [2020-10-27 14:38:23,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:23,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:38:23,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832294210] [2020-10-27 14:38:23,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:38:23,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:23,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:38:23,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:38:23,720 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 14 states. [2020-10-27 14:38:25,117 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-27 14:38:25,805 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-27 14:38:25,988 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2020-10-27 14:38:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:26,108 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-27 14:38:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:38:26,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-27 14:38:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:26,115 INFO L225 Difference]: With dead ends: 66 [2020-10-27 14:38:26,116 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:38:26,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:38:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:38:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2020-10-27 14:38:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:38:26,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-27 14:38:26,143 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 28 [2020-10-27 14:38:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:26,147 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-27 14:38:26,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:38:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-27 14:38:26,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:38:26,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:26,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:26,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:38:26,153 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2060613828, now seen corresponding path program 2 times [2020-10-27 14:38:26,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:26,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001127899] [2020-10-27 14:38:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:26,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:28,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:28,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:38:28,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:38:28,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2377 [2020-10-27 14:38:28,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:28,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:38:28,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:38:28,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:38:28,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:38:28,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:28,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:28,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:28,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:28,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:28,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:28,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:28,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:28,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:28,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:28,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:28,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:28,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:28,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:28,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:28,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:28,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:28,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:28,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:28,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:38:28,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001127899] [2020-10-27 14:38:28,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:28,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:38:28,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805828456] [2020-10-27 14:38:28,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:38:28,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:28,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:38:28,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:38:28,696 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 8 states. [2020-10-27 14:38:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:29,080 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-10-27 14:38:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:38:29,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-27 14:38:29,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:29,084 INFO L225 Difference]: With dead ends: 106 [2020-10-27 14:38:29,084 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:38:29,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:38:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:38:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2020-10-27 14:38:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:38:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-27 14:38:29,107 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 31 [2020-10-27 14:38:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:29,108 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-27 14:38:29,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:38:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-27 14:38:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:38:29,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:29,110 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:29,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:38:29,110 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:29,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1080780804, now seen corresponding path program 2 times [2020-10-27 14:38:29,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:29,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052382928] [2020-10-27 14:38:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:29,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:29,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:29,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:29,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:30,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:30,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:31,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:32,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:32,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:38:32,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:38:32,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3152 [2020-10-27 14:38:32,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:38:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:38:32,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:38:32,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:38:32,554 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 20 [2020-10-27 14:38:32,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:32,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:32,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:32,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:32,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:32,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:38:32,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:32,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:32,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:32,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:32,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:32,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:32,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:32,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:32,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:32,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:32,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:32,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:32,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:38:32,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052382928] [2020-10-27 14:38:32,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:32,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:38:32,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032076844] [2020-10-27 14:38:32,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:38:32,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:38:32,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:38:32,726 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 8 states. [2020-10-27 14:38:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:33,094 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-27 14:38:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:38:33,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-27 14:38:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:33,098 INFO L225 Difference]: With dead ends: 85 [2020-10-27 14:38:33,098 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 14:38:33,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:38:33,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 14:38:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-10-27 14:38:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:38:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-27 14:38:33,136 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 31 [2020-10-27 14:38:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:33,136 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-27 14:38:33,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:38:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-27 14:38:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:38:33,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:33,142 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:33,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:38:33,144 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:33,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1903668454, now seen corresponding path program 3 times [2020-10-27 14:38:33,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:33,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439528929] [2020-10-27 14:38:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:33,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:33,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:33,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:33,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:38:33,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:38:33,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-27 14:38:33,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:33,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:38:33,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:38:33,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:38:33,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:34,539 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2020-10-27 14:38:34,688 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2020-10-27 14:38:34,831 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 20 [2020-10-27 14:38:34,991 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 22 [2020-10-27 14:38:35,720 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 21 [2020-10-27 14:38:35,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:35,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:35,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:35,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:35,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:35,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:38:35,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:35,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:35,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:35,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:35,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:35,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:35,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:35,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:35,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:38:35,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:35,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:35,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:35,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:35,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:38:35,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439528929] [2020-10-27 14:38:35,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:35,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:38:35,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472504609] [2020-10-27 14:38:35,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:38:35,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:35,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:38:35,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:38:35,872 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 18 states. [2020-10-27 14:38:36,175 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2020-10-27 14:38:38,624 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2020-10-27 14:38:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:38,910 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-27 14:38:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:38:38,911 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-27 14:38:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:38,912 INFO L225 Difference]: With dead ends: 116 [2020-10-27 14:38:38,913 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 14:38:38,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=314, Invalid=1492, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:38:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 14:38:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2020-10-27 14:38:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:38:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-10-27 14:38:38,931 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 33 [2020-10-27 14:38:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:38,931 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-10-27 14:38:38,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:38:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-10-27 14:38:38,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 14:38:38,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:38,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:38,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:38:38,933 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:38,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1311152645, now seen corresponding path program 3 times [2020-10-27 14:38:38,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:38,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128078217] [2020-10-27 14:38:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:38,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:39,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:39,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:39,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:40,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:40,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:42,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:42,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 14:38:42,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:38:42,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3363 [2020-10-27 14:38:42,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:42,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:38:42,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:38:42,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:38:42,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:38:42,624 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 24 [2020-10-27 14:38:42,782 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 25 [2020-10-27 14:38:42,937 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 29 [2020-10-27 14:38:43,115 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2020-10-27 14:38:43,267 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 19 [2020-10-27 14:38:43,437 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 23 [2020-10-27 14:38:43,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:43,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:43,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:43,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:43,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:43,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:43,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:43,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:43,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:43,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:43,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:43,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:43,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:43,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:43,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:43,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:43,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:38:43,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128078217] [2020-10-27 14:38:43,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:43,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:38:43,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126299007] [2020-10-27 14:38:43,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:38:43,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:43,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:38:43,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:38:43,709 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-10-27 14:38:44,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:44,478 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2020-10-27 14:38:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:38:44,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 14:38:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:44,481 INFO L225 Difference]: With dead ends: 114 [2020-10-27 14:38:44,481 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 14:38:44,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:38:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 14:38:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-10-27 14:38:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:38:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-27 14:38:44,501 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 34 [2020-10-27 14:38:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:44,501 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-27 14:38:44,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:38:44,502 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-27 14:38:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:38:44,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:44,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:44,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:38:44,509 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:44,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:44,514 INFO L82 PathProgramCache]: Analyzing trace with hash 676835237, now seen corresponding path program 4 times [2020-10-27 14:38:44,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:44,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8743361] [2020-10-27 14:38:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:44,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:44,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:44,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:45,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:45,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:48,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:48,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:38:48,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:38:48,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4231 [2020-10-27 14:38:48,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:48,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:38:48,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:38:48,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:38:48,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:48,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:48,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:48,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:48,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:48,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:48,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:38:48,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:48,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:48,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:48,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:48,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:48,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:48,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:48,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:48,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:48,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:48,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:48,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:48,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:38:48,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8743361] [2020-10-27 14:38:48,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:48,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:38:48,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619891464] [2020-10-27 14:38:48,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:38:48,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:48,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:38:48,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:38:48,956 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 9 states. [2020-10-27 14:38:49,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:49,470 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-10-27 14:38:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:38:49,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 14:38:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:49,473 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:38:49,473 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:38:49,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:38:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:38:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2020-10-27 14:38:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:38:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-10-27 14:38:49,492 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 36 [2020-10-27 14:38:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:49,492 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-10-27 14:38:49,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:38:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-10-27 14:38:49,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:38:49,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:49,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:49,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:38:49,495 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:49,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:49,495 INFO L82 PathProgramCache]: Analyzing trace with hash 90029223, now seen corresponding path program 1 times [2020-10-27 14:38:49,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:49,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685871367] [2020-10-27 14:38:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:49,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:50,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:50,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:50,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:38:50,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:38:50,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-27 14:38:50,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:50,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:38:50,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:38:50,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:38:50,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:50,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:50,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:50,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:50,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:50,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:50,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:38:50,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:50,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:50,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:50,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:50,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:50,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:50,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:51,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:51,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:51,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:51,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:51,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:38:51,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685871367] [2020-10-27 14:38:51,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:38:51,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:38:51,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077808129] [2020-10-27 14:38:51,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:38:51,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:51,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:38:51,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:38:51,007 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 4 states. [2020-10-27 14:38:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:51,172 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-27 14:38:51,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:38:51,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-27 14:38:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:51,175 INFO L225 Difference]: With dead ends: 110 [2020-10-27 14:38:51,175 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 14:38:51,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 14:38:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 14:38:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-27 14:38:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:38:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-27 14:38:51,206 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-10-27 14:38:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:51,209 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-27 14:38:51,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:38:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-27 14:38:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:38:51,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:51,215 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:51,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:38:51,215 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:51,217 INFO L82 PathProgramCache]: Analyzing trace with hash -302997787, now seen corresponding path program 2 times [2020-10-27 14:38:51,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:51,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174512462] [2020-10-27 14:38:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:51,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:52,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:52,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:38:52,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:38:52,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1545 [2020-10-27 14:38:52,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:52,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:38:52,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:38:52,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:38:52,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:52,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:52,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:52,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:52,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:52,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:52,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:38:52,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:52,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:52,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:52,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:52,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:52,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:52,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:52,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:52,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:52,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:52,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:52,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:52,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:52,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:38:52,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174512462] [2020-10-27 14:38:52,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:38:52,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:38:52,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033824617] [2020-10-27 14:38:52,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:38:52,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:52,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:38:52,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:38:52,861 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 4 states. [2020-10-27 14:38:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:53,025 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2020-10-27 14:38:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:38:53,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-27 14:38:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:53,028 INFO L225 Difference]: With dead ends: 106 [2020-10-27 14:38:53,028 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:38:53,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 14:38:53,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:38:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2020-10-27 14:38:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:38:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-10-27 14:38:53,047 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 36 [2020-10-27 14:38:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:53,048 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-10-27 14:38:53,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:38:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-10-27 14:38:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:38:53,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:53,050 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:53,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:38:53,051 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:53,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2034810746, now seen corresponding path program 5 times [2020-10-27 14:38:53,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:53,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292298101] [2020-10-27 14:38:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:53,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:53,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:54,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:54,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:38:54,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:38:54,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-27 14:38:54,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:38:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:38:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:38:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:55,269 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 19 [2020-10-27 14:38:55,613 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-27 14:38:55,858 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2020-10-27 14:38:56,106 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 24 [2020-10-27 14:38:56,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:56,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:56,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:56,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:56,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:56,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:56,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:56,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:56,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:56,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:56,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:56,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:56,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:56,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:56,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:56,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:56,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:56,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:56,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:38:56,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292298101] [2020-10-27 14:38:56,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:56,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:38:56,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217241434] [2020-10-27 14:38:56,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:38:56,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:56,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:38:56,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:38:56,230 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 13 states. [2020-10-27 14:38:57,550 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-10-27 14:38:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:57,680 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-10-27 14:38:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:38:57,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 14:38:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:57,683 INFO L225 Difference]: With dead ends: 104 [2020-10-27 14:38:57,683 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:38:57,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:38:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:38:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-27 14:38:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:38:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-10-27 14:38:57,702 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 39 [2020-10-27 14:38:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:57,703 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-10-27 14:38:57,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:38:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-10-27 14:38:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:38:57,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:57,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:57,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:38:57,706 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash -2146708784, now seen corresponding path program 1 times [2020-10-27 14:38:57,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:57,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907311175] [2020-10-27 14:38:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:57,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:57,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:58,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:58,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:38:58,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:38:58,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 956 [2020-10-27 14:38:58,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:38:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:38:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:38:58,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:59,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:59,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:59,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:59,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:59,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:59,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:38:59,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:59,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:59,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:59,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:59,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:59,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:59,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:59,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:59,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:59,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:59,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:59,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:59,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:59,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:59,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:59,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:59,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 14:38:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:59,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:59,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:59,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:59,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:59,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:38:59,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:59,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:38:59,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:59,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:38:59,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:38:59,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907311175] [2020-10-27 14:38:59,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:59,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:38:59,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189734258] [2020-10-27 14:38:59,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:38:59,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:38:59,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:38:59,769 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 17 states. [2020-10-27 14:39:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:01,728 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2020-10-27 14:39:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:39:01,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 14:39:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:01,730 INFO L225 Difference]: With dead ends: 91 [2020-10-27 14:39:01,730 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 14:39:01,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:39:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 14:39:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-27 14:39:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:39:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-27 14:39:01,744 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 41 [2020-10-27 14:39:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:01,745 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-27 14:39:01,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:39:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-27 14:39:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:39:01,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:01,746 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:01,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:39:01,746 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:01,747 INFO L82 PathProgramCache]: Analyzing trace with hash 499593455, now seen corresponding path program 1 times [2020-10-27 14:39:01,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:01,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481499578] [2020-10-27 14:39:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:04,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 14:39:04,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:39:04,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2486 [2020-10-27 14:39:04,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:39:04,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:04,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:39:04,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:04,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:04,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:04,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:04,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:04,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:04,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:04,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:04,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:04,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:04,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:04,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:04,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:04,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:04,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:04,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:04,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:04,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:04,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:04,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 14:39:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:04,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:04,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:04,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:04,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:04,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:04,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:04,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:39:04,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:04,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:39:04,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481499578] [2020-10-27 14:39:04,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:04,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:39:04,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260632593] [2020-10-27 14:39:04,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:39:04,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:04,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:39:04,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:39:04,365 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 9 states. [2020-10-27 14:39:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:04,699 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2020-10-27 14:39:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:39:04,700 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-27 14:39:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:04,702 INFO L225 Difference]: With dead ends: 110 [2020-10-27 14:39:04,702 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:39:04,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:39:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:39:04,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2020-10-27 14:39:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 14:39:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-27 14:39:04,714 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 42 [2020-10-27 14:39:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:04,714 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-27 14:39:04,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:39:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-27 14:39:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:39:04,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:04,715 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:04,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:39:04,715 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:04,716 INFO L82 PathProgramCache]: Analyzing trace with hash -640419835, now seen corresponding path program 6 times [2020-10-27 14:39:04,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:04,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071990384] [2020-10-27 14:39:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:04,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:09,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:39:09,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:39:09,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:39:09,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:39:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:39:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:39:09,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:09,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:09,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:09,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:09,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:09,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:39:09,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:09,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:09,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:09,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:09,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:09,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:09,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:09,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:09,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:09,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:09,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:09,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:39:10,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071990384] [2020-10-27 14:39:10,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:10,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:39:10,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275340400] [2020-10-27 14:39:10,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:39:10,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:39:10,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:39:10,005 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 11 states. [2020-10-27 14:39:10,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:10,949 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2020-10-27 14:39:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:39:10,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-27 14:39:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:10,952 INFO L225 Difference]: With dead ends: 119 [2020-10-27 14:39:10,952 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 14:39:10,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:39:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 14:39:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2020-10-27 14:39:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:39:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-27 14:39:10,967 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 42 [2020-10-27 14:39:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:10,968 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-27 14:39:10,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:39:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-27 14:39:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 14:39:10,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:10,969 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:10,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:39:10,969 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:10,970 INFO L82 PathProgramCache]: Analyzing trace with hash 422671245, now seen corresponding path program 2 times [2020-10-27 14:39:10,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:10,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630284147] [2020-10-27 14:39:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:10,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:14,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:39:14,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:39:14,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3717 [2020-10-27 14:39:14,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:14,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:39:14,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:39:14,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:39:14,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:15,903 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 19 [2020-10-27 14:39:16,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:16,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:16,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:16,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:16,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:16,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:39:16,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:16,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:16,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:16,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:16,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:16,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:16,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:16,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:16,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:16,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:16,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:16,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:16,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:16,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:16,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:16,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:16,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 14:39:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:16,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:16,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:16,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:16,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:16,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:39:16,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:16,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:39:16,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:39:16,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:16,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630284147] [2020-10-27 14:39:16,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:16,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:39:16,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530975448] [2020-10-27 14:39:16,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:39:16,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:16,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:39:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:39:16,068 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 19 states. [2020-10-27 14:39:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:18,864 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2020-10-27 14:39:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:39:18,865 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-27 14:39:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:18,866 INFO L225 Difference]: With dead ends: 112 [2020-10-27 14:39:18,866 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 14:39:18,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:39:18,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 14:39:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2020-10-27 14:39:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 14:39:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2020-10-27 14:39:18,885 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 44 [2020-10-27 14:39:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:18,885 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2020-10-27 14:39:18,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:39:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2020-10-27 14:39:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:39:18,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:18,886 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:18,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:39:18,887 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1264477146, now seen corresponding path program 7 times [2020-10-27 14:39:18,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:18,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472064835] [2020-10-27 14:39:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:18,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:21,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:39:21,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:39:21,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3029 [2020-10-27 14:39:21,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:39:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:39:21,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:22,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:22,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:22,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:22,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:22,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:22,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:22,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:22,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:22,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:22,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:22,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:22,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:39:22,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:22,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:39:22,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472064835] [2020-10-27 14:39:22,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:22,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:39:22,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793156242] [2020-10-27 14:39:22,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:39:22,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:22,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:39:22,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:39:22,083 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 12 states. [2020-10-27 14:39:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:22,532 INFO L93 Difference]: Finished difference Result 161 states and 178 transitions. [2020-10-27 14:39:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:39:22,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-27 14:39:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:22,533 INFO L225 Difference]: With dead ends: 161 [2020-10-27 14:39:22,534 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 14:39:22,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:39:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 14:39:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2020-10-27 14:39:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 14:39:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-10-27 14:39:22,547 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 45 [2020-10-27 14:39:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:22,547 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-10-27 14:39:22,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:39:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-10-27 14:39:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:39:22,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:22,548 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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 14:39:22,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:39:22,548 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:22,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:22,549 INFO L82 PathProgramCache]: Analyzing trace with hash 658500808, now seen corresponding path program 8 times [2020-10-27 14:39:22,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:22,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370138661] [2020-10-27 14:39:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:22,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:26,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:27,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:39:27,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:39:27,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:39:27,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:39:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:39:27,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:27,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:27,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:27,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:27,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:27,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:39:27,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:27,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:27,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:27,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:27,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:27,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:27,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:27,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:27,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:27,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:27,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:27,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:27,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 51 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:27,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370138661] [2020-10-27 14:39:27,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:27,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:39:27,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085017581] [2020-10-27 14:39:27,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:39:27,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:27,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:39:27,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:39:27,790 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 14 states. [2020-10-27 14:39:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:28,448 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2020-10-27 14:39:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:39:28,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-27 14:39:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:28,450 INFO L225 Difference]: With dead ends: 174 [2020-10-27 14:39:28,450 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 14:39:28,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:39:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 14:39:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2020-10-27 14:39:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 14:39:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2020-10-27 14:39:28,475 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 47 [2020-10-27 14:39:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:28,475 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2020-10-27 14:39:28,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:39:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2020-10-27 14:39:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:39:28,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:28,477 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 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 14:39:28,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:39:28,477 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:28,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1804377322, now seen corresponding path program 9 times [2020-10-27 14:39:28,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:28,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825405619] [2020-10-27 14:39:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:28,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:28,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:31,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:39:31,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:39:31,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3079 [2020-10-27 14:39:31,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:31,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:39:31,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:31,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:39:31,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:39,336 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 12 [2020-10-27 14:39:40,179 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 17 [2020-10-27 14:39:41,983 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 241 DAG size of output: 21 [2020-10-27 14:39:42,738 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 33 [2020-10-27 14:39:44,157 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 201 DAG size of output: 37 [2020-10-27 14:39:44,702 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 42 [2020-10-27 14:39:45,837 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 147 DAG size of output: 51 [2020-10-27 14:39:47,318 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 230 DAG size of output: 22 [2020-10-27 14:39:47,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:47,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:47,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:47,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:47,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:47,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:47,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:47,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:47,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:47,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:47,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:47,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:47,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:47,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:47,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:47,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:47,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:47,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:47,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:47,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:39:47,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825405619] [2020-10-27 14:39:47,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:47,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:39:47,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766599757] [2020-10-27 14:39:47,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:39:47,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:39:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:39:47,449 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 15 states. [2020-10-27 14:39:48,297 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-27 14:39:48,555 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-27 14:39:48,980 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-27 14:39:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:49,122 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-10-27 14:39:49,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:39:49,123 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 14:39:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:49,125 INFO L225 Difference]: With dead ends: 144 [2020-10-27 14:39:49,125 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:39:49,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:39:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:39:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 110. [2020-10-27 14:39:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 14:39:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-10-27 14:39:49,148 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 49 [2020-10-27 14:39:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:49,148 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-10-27 14:39:49,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:39:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-10-27 14:39:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:39:49,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:49,149 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:49,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:39:49,150 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2063882700, now seen corresponding path program 2 times [2020-10-27 14:39:49,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:49,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502024503] [2020-10-27 14:39:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:49,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:49,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:50,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:50,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:39:50,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:39:50,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1252 [2020-10-27 14:39:50,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:39:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:39:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:39:50,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:50,711 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-27 14:39:50,919 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-27 14:39:52,343 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 12 [2020-10-27 14:39:52,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:52,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:52,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:52,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:52,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:52,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:52,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:52,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:52,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:52,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:52,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:52,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:52,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:52,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:52,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:52,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:52,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:52,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:52,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:52,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:52,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:52,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:52,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:39:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:52,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:52,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:52,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:52,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:52,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:39:52,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:52,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:39:52,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:52,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:39:52,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:52,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502024503] [2020-10-27 14:39:52,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:52,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:39:52,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538205035] [2020-10-27 14:39:52,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:39:52,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:52,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:39:52,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:39:52,542 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 24 states. [2020-10-27 14:39:53,827 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-27 14:39:54,405 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 14:39:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:55,223 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2020-10-27 14:39:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:39:55,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-10-27 14:39:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:55,227 INFO L225 Difference]: With dead ends: 130 [2020-10-27 14:39:55,227 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 14:39:55,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:39:55,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 14:39:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2020-10-27 14:39:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 14:39:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2020-10-27 14:39:55,252 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 51 [2020-10-27 14:39:55,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:55,253 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2020-10-27 14:39:55,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:39:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2020-10-27 14:39:55,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:39:55,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:55,254 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:55,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:39:55,254 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:55,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:55,255 INFO L82 PathProgramCache]: Analyzing trace with hash 527046549, now seen corresponding path program 3 times [2020-10-27 14:39:55,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:55,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600493607] [2020-10-27 14:39:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:55,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:56,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:56,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:59,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:59,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:00,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:00,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:40:00,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:40:00,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:40:00,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:00,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:40:00,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:40:00,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:40:00,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:00,965 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2020-10-27 14:40:01,120 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-27 14:40:01,261 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 22 [2020-10-27 14:40:01,510 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 18 [2020-10-27 14:40:01,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:01,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:01,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:01,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:01,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:01,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:01,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:01,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:01,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:01,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:01,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:01,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:01,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:01,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:01,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:01,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:01,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:01,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:01,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:01,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:01,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:01,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:01,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 14:40:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:01,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:01,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:01,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:01,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:01,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:40:01,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:01,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:40:01,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:01,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:40:01,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:01,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:40:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:01,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:01,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:01,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:01,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:01,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:40:01,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:40:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:40:01,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 14:40:01,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600493607] [2020-10-27 14:40:01,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:01,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:40:01,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111883771] [2020-10-27 14:40:01,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:40:01,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:01,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:40:01,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:40:01,684 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand 18 states. [2020-10-27 14:40:02,642 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-27 14:40:03,533 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-10-27 14:40:03,730 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-27 14:40:04,026 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-27 14:40:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:04,289 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2020-10-27 14:40:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:40:04,290 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-27 14:40:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:04,292 INFO L225 Difference]: With dead ends: 132 [2020-10-27 14:40:04,292 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 14:40:04,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:40:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 14:40:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-10-27 14:40:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:40:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-10-27 14:40:04,310 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 54 [2020-10-27 14:40:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:04,311 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-10-27 14:40:04,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:40:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-10-27 14:40:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:40:04,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:04,312 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 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 14:40:04,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:40:04,312 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:04,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1927188769, now seen corresponding path program 10 times [2020-10-27 14:40:04,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:04,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342333684] [2020-10-27 14:40:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:04,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:06,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:09,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:09,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:40:09,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:40:09,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:40:09,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:40:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:40:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:40:09,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:09,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:09,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:09,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:09,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:09,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:09,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:09,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:09,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:09,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:09,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:09,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:09,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:09,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:09,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:09,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:09,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:09,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:09,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:09,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:40:09,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342333684] [2020-10-27 14:40:09,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:09,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:40:09,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828633682] [2020-10-27 14:40:09,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:40:09,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:09,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:40:09,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:40:09,602 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 13 states. [2020-10-27 14:40:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:11,236 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2020-10-27 14:40:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:40:11,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-27 14:40:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:11,242 INFO L225 Difference]: With dead ends: 139 [2020-10-27 14:40:11,242 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 14:40:11,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:40:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 14:40:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2020-10-27 14:40:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:40:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-10-27 14:40:11,258 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 52 [2020-10-27 14:40:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:11,258 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-10-27 14:40:11,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:40:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-10-27 14:40:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:40:11,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:11,259 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:11,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:40:11,259 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:11,260 INFO L82 PathProgramCache]: Analyzing trace with hash 234204777, now seen corresponding path program 4 times [2020-10-27 14:40:11,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:11,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128797056] [2020-10-27 14:40:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:11,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:12,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:13,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:15,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:16,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:16,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:40:16,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:40:16,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:40:16,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:40:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:40:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 14:40:16,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:17,325 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 39 [2020-10-27 14:40:18,973 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 404 DAG size of output: 47 [2020-10-27 14:40:19,213 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 32 [2020-10-27 14:40:21,491 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 503 DAG size of output: 49 [2020-10-27 14:40:22,020 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 31 [2020-10-27 14:40:22,423 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 31 [2020-10-27 14:40:22,694 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 30 [2020-10-27 14:40:23,018 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 27 [2020-10-27 14:40:23,277 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 33 [2020-10-27 14:40:23,637 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 30 [2020-10-27 14:40:23,985 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 25 [2020-10-27 14:40:24,211 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 21 [2020-10-27 14:40:24,458 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 24 [2020-10-27 14:40:24,804 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 33 [2020-10-27 14:40:25,207 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 18 [2020-10-27 14:40:25,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:25,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:25,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:25,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:25,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:25,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:25,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:25,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:25,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:25,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:25,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:25,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:25,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:25,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:25,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:25,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:25,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:40:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:25,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:25,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:25,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:25,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:25,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:40:25,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:25,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:40:25,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:25,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:40:25,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:40:25,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128797056] [2020-10-27 14:40:25,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:25,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:40:25,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122067639] [2020-10-27 14:40:25,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:40:25,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:25,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:40:25,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:40:25,446 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 26 states. [2020-10-27 14:40:25,830 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 38 [2020-10-27 14:40:26,217 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-27 14:40:26,686 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-27 14:40:26,906 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-27 14:40:27,115 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-27 14:40:27,452 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-27 14:40:27,630 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-27 14:40:28,373 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 41 [2020-10-27 14:40:28,549 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-10-27 14:40:28,796 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 44 [2020-10-27 14:40:29,248 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-27 14:40:29,409 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-27 14:40:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:29,868 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-27 14:40:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:40:29,870 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-10-27 14:40:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:29,872 INFO L225 Difference]: With dead ends: 140 [2020-10-27 14:40:29,872 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 14:40:29,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:40:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 14:40:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-10-27 14:40:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 14:40:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2020-10-27 14:40:29,892 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 54 [2020-10-27 14:40:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:29,892 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2020-10-27 14:40:29,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:40:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2020-10-27 14:40:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:40:29,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:29,893 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 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 14:40:29,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:40:29,893 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:29,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:29,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1290870154, now seen corresponding path program 11 times [2020-10-27 14:40:29,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:29,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096739203] [2020-10-27 14:40:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:29,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:29,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:30,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:30,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:30,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:34,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:34,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:40:34,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:40:34,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:40:34,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:34,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:40:34,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:34,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 14:40:34,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0