/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/bitvector-loops/overflow_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 15:00:01,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 15:00:01,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 15:00:01,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 15:00:01,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 15:00:01,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 15:00:01,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 15:00:01,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 15:00:01,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 15:00:01,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 15:00:01,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 15:00:01,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 15:00:01,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 15:00:01,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 15:00:01,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 15:00:01,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 15:00:01,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 15:00:01,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 15:00:01,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 15:00:01,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 15:00:01,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 15:00:01,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 15:00:01,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 15:00:01,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 15:00:01,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 15:00:01,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 15:00:01,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 15:00:01,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 15:00:01,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 15:00:01,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 15:00:01,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 15:00:01,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 15:00:01,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 15:00:01,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 15:00:01,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 15:00:01,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 15:00:01,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 15:00:01,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 15:00:01,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 15:00:01,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 15:00:01,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 15:00:01,974 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 15:00:02,001 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 15:00:02,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 15:00:02,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 15:00:02,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 15:00:02,003 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 15:00:02,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 15:00:02,004 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 15:00:02,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 15:00:02,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 15:00:02,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 15:00:02,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 15:00:02,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 15:00:02,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 15:00:02,005 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 15:00:02,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 15:00:02,005 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 15:00:02,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 15:00:02,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 15:00:02,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 15:00:02,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 15:00:02,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 15:00:02,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 15:00:02,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 15:00:02,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 15:00:02,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 15:00:02,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 15:00:02,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 15:00:02,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 15:00:02,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 15:00:02,008 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 15:00:02,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 15:00:02,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 15:00:02,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 15:00:02,397 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 15:00:02,397 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 15:00:02,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/overflow_1-2.c [2020-10-27 15:00:02,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa60beb89/9b9e01f3be684455a21ea3c89bf85f20/FLAG509dd7cd9 [2020-10-27 15:00:03,118 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 15:00:03,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/overflow_1-2.c [2020-10-27 15:00:03,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa60beb89/9b9e01f3be684455a21ea3c89bf85f20/FLAG509dd7cd9 [2020-10-27 15:00:03,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa60beb89/9b9e01f3be684455a21ea3c89bf85f20 [2020-10-27 15:00:03,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 15:00:03,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 15:00:03,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 15:00:03,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 15:00:03,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 15:00:03,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:00:03" (1/1) ... [2020-10-27 15:00:03,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f45be95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03, skipping insertion in model container [2020-10-27 15:00:03,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:00:03" (1/1) ... [2020-10-27 15:00:03,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 15:00:03,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 15:00:03,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:00:03,714 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 15:00:03,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:00:03,748 INFO L208 MainTranslator]: Completed translation [2020-10-27 15:00:03,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03 WrapperNode [2020-10-27 15:00:03,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 15:00:03,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 15:00:03,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 15:00:03,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 15:00:03,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03" (1/1) ... [2020-10-27 15:00:03,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03" (1/1) ... [2020-10-27 15:00:03,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03" (1/1) ... [2020-10-27 15:00:03,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03" (1/1) ... [2020-10-27 15:00:03,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03" (1/1) ... [2020-10-27 15:00:03,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03" (1/1) ... [2020-10-27 15:00:03,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03" (1/1) ... [2020-10-27 15:00:03,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 15:00:03,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 15:00:03,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 15:00:03,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 15:00:03,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03" (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 15:00:03,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 15:00:03,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 15:00:03,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 15:00:03,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 15:00:03,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 15:00:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 15:00:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 15:00:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 15:00:03,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 15:00:03,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 15:00:03,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 15:00:03,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 15:00:03,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 15:00:03,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 15:00:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 15:00:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 15:00:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 15:00:04,303 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 15:00:04,303 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 15:00:04,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:00:04 BoogieIcfgContainer [2020-10-27 15:00:04,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 15:00:04,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 15:00:04,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 15:00:04,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 15:00:04,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:00:03" (1/3) ... [2020-10-27 15:00:04,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d934d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:00:04, skipping insertion in model container [2020-10-27 15:00:04,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:00:03" (2/3) ... [2020-10-27 15:00:04,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d934d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:00:04, skipping insertion in model container [2020-10-27 15:00:04,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:00:04" (3/3) ... [2020-10-27 15:00:04,319 INFO L111 eAbstractionObserver]: Analyzing ICFG overflow_1-2.c [2020-10-27 15:00:04,332 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 15:00:04,337 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 15:00:04,352 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 15:00:04,394 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 15:00:04,394 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 15:00:04,394 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 15:00:04,395 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 15:00:04,395 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 15:00:04,395 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 15:00:04,395 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 15:00:04,395 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 15:00:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 15:00:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 15:00:04,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:04,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:04,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:04,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:04,443 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 15:00:04,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:04,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316881808] [2020-10-27 15:00:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:04,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:04,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:04,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:00:04,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:04,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-27 15:00:04,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:04,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:04,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 15:00:04,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:04,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:04,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:04,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:04,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:04,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 15:00:04,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:04,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:05,008 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 15:00:05,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316881808] [2020-10-27 15:00:05,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 15:00:05,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 15:00:05,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549705215] [2020-10-27 15:00:05,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 15:00:05,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:05,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 15:00:05,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 15:00:05,033 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 15:00:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:05,090 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-27 15:00:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 15:00:05,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 15:00:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:05,099 INFO L225 Difference]: With dead ends: 34 [2020-10-27 15:00:05,100 INFO L226 Difference]: Without dead ends: 13 [2020-10-27 15:00:05,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 15:00:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-27 15:00:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-27 15:00:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-27 15:00:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-27 15:00:05,144 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-27 15:00:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:05,144 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-27 15:00:05,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 15:00:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-27 15:00:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 15:00:05,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:05,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:05,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 15:00:05,146 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:05,147 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-27 15:00:05,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:05,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136493801] [2020-10-27 15:00:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:05,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:05,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:05,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:00:05,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:05,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 15:00:05,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:05,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:05,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:05,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 15:00:05,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:05,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:05,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:05,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:05,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:05,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:05,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 15:00:05,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:05,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:05,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:05,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:05,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:05,400 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 15:00:05,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136493801] [2020-10-27 15:00:05,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 15:00:05,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 15:00:05,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919789428] [2020-10-27 15:00:05,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 15:00:05,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:05,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 15:00:05,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 15:00:05,405 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-27 15:00:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:05,486 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 15:00:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 15:00:05,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 15:00:05,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:05,487 INFO L225 Difference]: With dead ends: 20 [2020-10-27 15:00:05,488 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 15:00:05,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:00:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 15:00:05,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 15:00:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 15:00:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 15:00:05,498 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 15:00:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:05,499 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 15:00:05,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 15:00:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 15:00:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 15:00:05,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:05,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:05,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 15:00:05,500 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:05,501 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 15:00:05,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:05,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396505855] [2020-10-27 15:00:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:05,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:05,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:05,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 15:00:05,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 15:00:05,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 15:00:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 15:00:05,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:05,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:05,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:05,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:05,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:05,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:05,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:00:05,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:05,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:05,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:05,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:05,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:05,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396505855] [2020-10-27 15:00:05,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:05,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:00:05,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764127673] [2020-10-27 15:00:05,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:00:05,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:05,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:00:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:00:05,748 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-27 15:00:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:05,888 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 15:00:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:00:05,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 15:00:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:05,889 INFO L225 Difference]: With dead ends: 21 [2020-10-27 15:00:05,890 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 15:00:05,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:00:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 15:00:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 15:00:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 15:00:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 15:00:05,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 15:00:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:05,900 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 15:00:05,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:00:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 15:00:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 15:00:05,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:05,901 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:05,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 15:00:05,902 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:05,902 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 15:00:05,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:05,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266639961] [2020-10-27 15:00:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:05,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:06,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:06,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 15:00:06,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:06,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 15:00:06,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:06,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 15:00:06,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 15:00:06,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:06,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:06,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:06,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:06,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:06,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 15:00:06,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:06,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:06,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:06,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 15:00:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:06,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266639961] [2020-10-27 15:00:06,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:06,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 15:00:06,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352492120] [2020-10-27 15:00:06,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 15:00:06,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:06,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 15:00:06,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:00:06,255 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-27 15:00:06,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:06,451 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 15:00:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 15:00:06,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-27 15:00:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:06,454 INFO L225 Difference]: With dead ends: 22 [2020-10-27 15:00:06,454 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 15:00:06,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 15:00:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 15:00:06,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 15:00:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 15:00:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 15:00:06,468 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 15:00:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:06,468 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 15:00:06,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 15:00:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 15:00:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 15:00:06,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:06,470 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:06,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 15:00:06,470 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:06,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:06,471 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 15:00:06,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:06,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935762491] [2020-10-27 15:00:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:06,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:06,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:06,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 15:00:06,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:06,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 15:00:06,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:06,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 15:00:06,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:06,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 15:00:06,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:06,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:06,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:06,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:06,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:06,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:00:06,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:06,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:06,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935762491] [2020-10-27 15:00:06,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:06,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 15:00:06,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752751835] [2020-10-27 15:00:06,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 15:00:06,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:06,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 15:00:06,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:00:06,699 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-27 15:00:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:06,905 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 15:00:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 15:00:06,905 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-27 15:00:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:06,906 INFO L225 Difference]: With dead ends: 23 [2020-10-27 15:00:06,906 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 15:00:06,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 15:00:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 15:00:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 15:00:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 15:00:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 15:00:06,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 15:00:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:06,914 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 15:00:06,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 15:00:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 15:00:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 15:00:06,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:06,915 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:06,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 15:00:06,915 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:06,916 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 15:00:06,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:06,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443540529] [2020-10-27 15:00:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:06,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:07,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:07,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 15:00:07,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:07,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 15:00:07,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:07,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 15:00:07,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:07,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:07,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:07,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:07,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:07,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:07,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:07,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:07,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:00:07,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:07,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:07,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443540529] [2020-10-27 15:00:07,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:07,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 15:00:07,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403139708] [2020-10-27 15:00:07,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 15:00:07,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:07,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 15:00:07,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 15:00:07,227 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-27 15:00:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:07,498 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 15:00:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 15:00:07,500 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 15:00:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:07,501 INFO L225 Difference]: With dead ends: 24 [2020-10-27 15:00:07,501 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 15:00:07,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 15:00:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 15:00:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 15:00:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 15:00:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 15:00:07,514 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 15:00:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:07,514 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 15:00:07,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 15:00:07,515 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 15:00:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 15:00:07,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:07,518 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:07,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 15:00:07,518 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:07,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 15:00:07,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:07,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59209302] [2020-10-27 15:00:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:07,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:07,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:07,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 15:00:07,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:07,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-27 15:00:07,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:07,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 15:00:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 15:00:07,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:07,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:07,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:07,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:07,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:07,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:07,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:07,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:07,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:07,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:07,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59209302] [2020-10-27 15:00:07,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:07,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 15:00:07,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980694923] [2020-10-27 15:00:07,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 15:00:07,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 15:00:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 15:00:07,885 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 15:00:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:08,175 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 15:00:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 15:00:08,175 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 15:00:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:08,176 INFO L225 Difference]: With dead ends: 25 [2020-10-27 15:00:08,176 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 15:00:08,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 15:00:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 15:00:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 15:00:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 15:00:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 15:00:08,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 15:00:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:08,184 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 15:00:08,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 15:00:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 15:00:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 15:00:08,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:08,185 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:08,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 15:00:08,185 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:08,185 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 15:00:08,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:08,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30530717] [2020-10-27 15:00:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 15:00:08,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 15:00:08,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 15:00:08,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:08,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 15:00:08,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:08,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:00:08,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:08,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:08,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30530717] [2020-10-27 15:00:08,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:08,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 15:00:08,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766855518] [2020-10-27 15:00:08,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 15:00:08,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 15:00:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 15:00:08,535 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-27 15:00:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:09,078 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 15:00:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 15:00:09,079 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-27 15:00:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:09,080 INFO L225 Difference]: With dead ends: 26 [2020-10-27 15:00:09,080 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 15:00:09,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 15:00:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 15:00:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 15:00:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 15:00:09,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 15:00:09,087 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-27 15:00:09,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:09,088 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 15:00:09,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 15:00:09,088 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 15:00:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 15:00:09,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:09,089 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:09,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 15:00:09,089 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:09,090 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-27 15:00:09,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:09,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026832822] [2020-10-27 15:00:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:09,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:09,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:09,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 15:00:09,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:09,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-27 15:00:09,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 15:00:09,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:09,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 15:00:09,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:09,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:09,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:09,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:09,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:09,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:09,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:09,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:09,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:09,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:09,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:09,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:09,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026832822] [2020-10-27 15:00:09,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:09,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 15:00:09,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226686793] [2020-10-27 15:00:09,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 15:00:09,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:09,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 15:00:09,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 15:00:09,470 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-27 15:00:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:09,906 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-27 15:00:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 15:00:09,906 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-27 15:00:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:09,907 INFO L225 Difference]: With dead ends: 27 [2020-10-27 15:00:09,907 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 15:00:09,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-27 15:00:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 15:00:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 15:00:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 15:00:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-27 15:00:09,913 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-27 15:00:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:09,914 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-27 15:00:09,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 15:00:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-27 15:00:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 15:00:09,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:09,915 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:09,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 15:00:09,915 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:09,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1396409001, now seen corresponding path program 8 times [2020-10-27 15:00:09,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:09,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634247791] [2020-10-27 15:00:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:09,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:10,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:10,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 15:00:10,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:10,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-27 15:00:10,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:10,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:00:10,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:10,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 15:00:10,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:10,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:10,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:10,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:10,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:10,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:10,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:10,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:10,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:10,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:10,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:10,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:10,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634247791] [2020-10-27 15:00:10,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:10,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 15:00:10,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614387788] [2020-10-27 15:00:10,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 15:00:10,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 15:00:10,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 15:00:10,341 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-27 15:00:10,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:10,814 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 15:00:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 15:00:10,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-27 15:00:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:10,816 INFO L225 Difference]: With dead ends: 28 [2020-10-27 15:00:10,816 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 15:00:10,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-27 15:00:10,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 15:00:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 15:00:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 15:00:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-27 15:00:10,831 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-27 15:00:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:10,831 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-27 15:00:10,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 15:00:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-27 15:00:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 15:00:10,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:10,834 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:10,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 15:00:10,834 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:10,835 INFO L82 PathProgramCache]: Analyzing trace with hash 791282046, now seen corresponding path program 9 times [2020-10-27 15:00:10,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:10,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307391405] [2020-10-27 15:00:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:10,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:11,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:11,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 15:00:11,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:11,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-27 15:00:11,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 15:00:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:11,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 15:00:11,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:11,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:11,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:11,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:11,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:11,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:11,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:11,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:11,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:11,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:11,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:11,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:11,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307391405] [2020-10-27 15:00:11,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:11,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 15:00:11,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286313911] [2020-10-27 15:00:11,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 15:00:11,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 15:00:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 15:00:11,408 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-27 15:00:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:11,988 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-27 15:00:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 15:00:11,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-27 15:00:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:11,989 INFO L225 Difference]: With dead ends: 29 [2020-10-27 15:00:11,990 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 15:00:11,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-27 15:00:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 15:00:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 15:00:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 15:00:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-27 15:00:11,997 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-27 15:00:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:11,998 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-27 15:00:11,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 15:00:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-27 15:00:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 15:00:11,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:11,999 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:11,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 15:00:11,999 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:12,000 INFO L82 PathProgramCache]: Analyzing trace with hash -109772233, now seen corresponding path program 10 times [2020-10-27 15:00:12,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:12,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448570750] [2020-10-27 15:00:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:12,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:12,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:12,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 15:00:12,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:12,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-27 15:00:12,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:12,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 15:00:12,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:12,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 15:00:12,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:12,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:12,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:12,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:12,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:12,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:12,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:12,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:12,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:12,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:12,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448570750] [2020-10-27 15:00:12,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:12,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 15:00:12,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810953250] [2020-10-27 15:00:12,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 15:00:12,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:12,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 15:00:12,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 15:00:12,497 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-27 15:00:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:13,144 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 15:00:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 15:00:13,145 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-27 15:00:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:13,146 INFO L225 Difference]: With dead ends: 30 [2020-10-27 15:00:13,146 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 15:00:13,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-27 15:00:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 15:00:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 15:00:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 15:00:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 15:00:13,153 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-27 15:00:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:13,154 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 15:00:13,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 15:00:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 15:00:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 15:00:13,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:13,155 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:13,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 15:00:13,155 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:13,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:13,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2022316190, now seen corresponding path program 11 times [2020-10-27 15:00:13,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:13,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864737835] [2020-10-27 15:00:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:13,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:13,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:13,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 15:00:13,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:13,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-27 15:00:13,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:13,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 15:00:13,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:13,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 15:00:13,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:13,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:13,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:13,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:13,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:13,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:13,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:13,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:13,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:13,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864737835] [2020-10-27 15:00:13,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:13,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 15:00:13,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131172650] [2020-10-27 15:00:13,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 15:00:13,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:13,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 15:00:13,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 15:00:13,709 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-27 15:00:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:14,388 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-27 15:00:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 15:00:14,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-27 15:00:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:14,389 INFO L225 Difference]: With dead ends: 31 [2020-10-27 15:00:14,389 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 15:00:14,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-27 15:00:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 15:00:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 15:00:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 15:00:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-27 15:00:14,402 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-27 15:00:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:14,402 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-27 15:00:14,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 15:00:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-27 15:00:14,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 15:00:14,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:14,409 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:14,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 15:00:14,409 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:14,409 INFO L82 PathProgramCache]: Analyzing trace with hash -602419433, now seen corresponding path program 12 times [2020-10-27 15:00:14,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:14,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241799668] [2020-10-27 15:00:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:14,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:14,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:14,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 15:00:14,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:14,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-27 15:00:14,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 15:00:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 15:00:14,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 15:00:15,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:15,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:15,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:15,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:15,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:15,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:15,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:15,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:15,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:15,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:15,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:15,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241799668] [2020-10-27 15:00:15,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:15,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 15:00:15,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624654558] [2020-10-27 15:00:15,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 15:00:15,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:15,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 15:00:15,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 15:00:15,058 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-27 15:00:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:15,865 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 15:00:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 15:00:15,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-27 15:00:15,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:15,867 INFO L225 Difference]: With dead ends: 32 [2020-10-27 15:00:15,867 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 15:00:15,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-27 15:00:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 15:00:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 15:00:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 15:00:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 15:00:15,876 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-27 15:00:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:15,877 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 15:00:15,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 15:00:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 15:00:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 15:00:15,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:15,878 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:15,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 15:00:15,878 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash -364845122, now seen corresponding path program 13 times [2020-10-27 15:00:15,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:15,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762311502] [2020-10-27 15:00:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:15,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:16,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:16,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 15:00:16,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:16,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-27 15:00:16,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:16,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 15:00:16,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:16,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 15:00:16,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:16,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:16,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:16,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:16,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:16,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:16,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:16,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:16,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:16,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:16,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:16,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:16,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762311502] [2020-10-27 15:00:16,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:16,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 15:00:16,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85722223] [2020-10-27 15:00:16,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 15:00:16,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 15:00:16,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 15:00:16,658 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-27 15:00:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:17,557 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-27 15:00:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 15:00:17,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-27 15:00:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:17,559 INFO L225 Difference]: With dead ends: 33 [2020-10-27 15:00:17,559 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 15:00:17,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-27 15:00:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 15:00:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 15:00:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 15:00:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-27 15:00:17,567 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-27 15:00:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:17,568 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-27 15:00:17,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 15:00:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-27 15:00:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 15:00:17,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:17,569 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:17,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 15:00:17,569 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:17,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1589976073, now seen corresponding path program 14 times [2020-10-27 15:00:17,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:17,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212403420] [2020-10-27 15:00:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:17,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:18,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:18,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 15:00:18,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:18,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-27 15:00:18,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:18,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 15:00:18,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:18,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 15:00:18,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:18,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:18,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:18,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:18,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:18,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:18,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:18,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:18,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:18,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:18,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212403420] [2020-10-27 15:00:18,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:18,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 15:00:18,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421737541] [2020-10-27 15:00:18,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 15:00:18,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:18,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 15:00:18,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-27 15:00:18,436 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-27 15:00:19,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:19,373 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 15:00:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 15:00:19,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-27 15:00:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:19,375 INFO L225 Difference]: With dead ends: 34 [2020-10-27 15:00:19,375 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 15:00:19,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 15:00:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 15:00:19,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 15:00:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 15:00:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 15:00:19,384 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-27 15:00:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:19,384 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 15:00:19,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 15:00:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 15:00:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 15:00:19,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:19,385 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:19,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 15:00:19,386 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:19,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:19,386 INFO L82 PathProgramCache]: Analyzing trace with hash -914329890, now seen corresponding path program 15 times [2020-10-27 15:00:19,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:19,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530974341] [2020-10-27 15:00:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:19,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:19,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:19,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 15:00:19,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:19,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-27 15:00:19,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:19,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 15:00:19,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:19,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 15:00:19,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:20,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:20,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:20,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:20,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:20,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:20,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:20,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:20,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:20,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:20,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:20,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530974341] [2020-10-27 15:00:20,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:20,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 15:00:20,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043636186] [2020-10-27 15:00:20,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 15:00:20,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:20,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 15:00:20,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 15:00:20,283 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-27 15:00:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:21,318 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-27 15:00:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 15:00:21,319 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-27 15:00:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:21,320 INFO L225 Difference]: With dead ends: 35 [2020-10-27 15:00:21,320 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 15:00:21,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 15:00:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 15:00:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 15:00:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 15:00:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-27 15:00:21,329 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-27 15:00:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:21,329 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-27 15:00:21,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 15:00:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-27 15:00:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 15:00:21,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:21,330 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:21,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 15:00:21,330 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:21,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:21,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1444134697, now seen corresponding path program 16 times [2020-10-27 15:00:21,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:21,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675951552] [2020-10-27 15:00:21,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:21,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:21,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:21,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 15:00:21,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:21,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-27 15:00:21,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:21,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 15:00:21,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:21,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 15:00:21,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:22,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:22,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:22,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:22,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:22,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:22,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:22,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:22,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:22,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:22,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:22,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675951552] [2020-10-27 15:00:22,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:22,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 15:00:22,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221448701] [2020-10-27 15:00:22,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 15:00:22,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:22,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 15:00:22,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-27 15:00:22,240 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-27 15:00:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:23,363 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 15:00:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 15:00:23,364 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-27 15:00:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:23,365 INFO L225 Difference]: With dead ends: 36 [2020-10-27 15:00:23,365 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 15:00:23,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 15:00:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 15:00:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 15:00:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 15:00:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 15:00:23,374 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-27 15:00:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:23,374 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 15:00:23,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 15:00:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 15:00:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 15:00:23,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:23,375 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:23,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 15:00:23,376 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:23,376 INFO L82 PathProgramCache]: Analyzing trace with hash -688214530, now seen corresponding path program 17 times [2020-10-27 15:00:23,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:23,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022252347] [2020-10-27 15:00:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:23,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:24,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:24,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 15:00:24,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:24,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-27 15:00:24,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:24,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 15:00:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:24,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 15:00:24,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:24,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:24,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:24,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:24,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:24,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:24,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:24,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:24,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:24,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:24,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:24,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:24,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022252347] [2020-10-27 15:00:24,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:24,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 15:00:24,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506994439] [2020-10-27 15:00:24,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 15:00:24,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:24,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 15:00:24,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 15:00:24,476 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-27 15:00:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:25,714 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-27 15:00:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 15:00:25,715 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-27 15:00:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:25,715 INFO L225 Difference]: With dead ends: 37 [2020-10-27 15:00:25,715 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 15:00:25,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 15:00:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 15:00:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 15:00:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 15:00:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-27 15:00:25,724 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-27 15:00:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:25,724 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-27 15:00:25,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 15:00:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-27 15:00:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 15:00:25,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:25,725 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:25,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 15:00:25,725 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1270474167, now seen corresponding path program 18 times [2020-10-27 15:00:25,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:25,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141291923] [2020-10-27 15:00:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:25,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:26,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:26,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 15:00:26,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:26,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-27 15:00:26,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:26,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 15:00:26,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:26,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 15:00:26,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:26,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:26,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:26,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:26,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:26,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:26,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:26,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:26,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:26,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141291923] [2020-10-27 15:00:26,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:26,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 15:00:26,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250662461] [2020-10-27 15:00:26,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 15:00:26,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:26,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 15:00:26,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-27 15:00:26,812 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-27 15:00:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:28,122 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 15:00:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 15:00:28,126 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-27 15:00:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:28,127 INFO L225 Difference]: With dead ends: 38 [2020-10-27 15:00:28,127 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 15:00:28,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 15:00:28,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 15:00:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 15:00:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 15:00:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 15:00:28,136 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-27 15:00:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:28,136 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 15:00:28,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 15:00:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 15:00:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 15:00:28,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:28,137 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:28,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 15:00:28,137 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1860281630, now seen corresponding path program 19 times [2020-10-27 15:00:28,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:28,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670193270] [2020-10-27 15:00:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:28,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:28,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:28,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 15:00:28,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:28,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-27 15:00:28,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:28,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 15:00:28,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:28,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 15:00:28,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:29,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:29,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:29,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:29,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:29,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:29,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:29,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:29,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:29,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:29,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:29,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:29,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670193270] [2020-10-27 15:00:29,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:29,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 15:00:29,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845601857] [2020-10-27 15:00:29,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 15:00:29,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:29,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 15:00:29,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 15:00:29,547 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-27 15:00:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:30,929 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-27 15:00:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 15:00:30,929 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-27 15:00:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:30,930 INFO L225 Difference]: With dead ends: 39 [2020-10-27 15:00:30,930 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 15:00:30,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 15:00:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 15:00:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 15:00:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 15:00:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-27 15:00:30,938 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-27 15:00:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:30,938 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-27 15:00:30,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 15:00:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-27 15:00:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 15:00:30,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:30,939 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:30,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 15:00:30,939 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:30,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:30,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1330523497, now seen corresponding path program 20 times [2020-10-27 15:00:30,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:30,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418694629] [2020-10-27 15:00:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:30,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:31,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:31,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 15:00:31,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:31,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-27 15:00:31,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 15:00:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 15:00:31,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:32,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:32,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:32,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:32,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:32,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:32,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:32,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:32,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:32,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:32,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:32,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:32,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418694629] [2020-10-27 15:00:32,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:32,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 15:00:32,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846414499] [2020-10-27 15:00:32,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 15:00:32,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:32,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 15:00:32,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-27 15:00:32,219 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-10-27 15:00:33,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:33,707 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 15:00:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 15:00:33,710 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-27 15:00:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:33,711 INFO L225 Difference]: With dead ends: 40 [2020-10-27 15:00:33,711 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 15:00:33,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 15:00:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 15:00:33,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 15:00:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 15:00:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-27 15:00:33,719 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-27 15:00:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:33,719 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-27 15:00:33,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 15:00:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-27 15:00:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 15:00:33,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:33,720 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:33,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 15:00:33,720 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:33,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1461234626, now seen corresponding path program 21 times [2020-10-27 15:00:33,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:33,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145931346] [2020-10-27 15:00:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:33,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:34,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 15:00:34,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:34,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 856 [2020-10-27 15:00:34,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 15:00:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 15:00:34,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:35,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:35,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:35,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:35,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:35,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:35,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:00:35,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:35,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:35,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:35,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:35,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:35,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145931346] [2020-10-27 15:00:35,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:35,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 15:00:35,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785061949] [2020-10-27 15:00:35,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 15:00:35,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 15:00:35,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-27 15:00:35,201 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-27 15:00:36,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:36,816 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-27 15:00:36,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 15:00:36,816 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-27 15:00:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:36,817 INFO L225 Difference]: With dead ends: 41 [2020-10-27 15:00:36,817 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 15:00:36,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 15:00:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 15:00:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 15:00:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 15:00:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 15:00:36,828 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-27 15:00:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:36,828 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 15:00:36,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 15:00:36,829 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 15:00:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 15:00:36,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:36,833 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:36,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 15:00:36,833 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1218312329, now seen corresponding path program 22 times [2020-10-27 15:00:36,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:36,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944555525] [2020-10-27 15:00:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:36,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:37,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:37,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 15:00:37,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:37,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-27 15:00:37,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:37,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 15:00:37,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:37,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 15:00:37,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:38,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:38,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:38,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:38,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:38,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:38,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:38,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944555525] [2020-10-27 15:00:38,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:38,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 15:00:38,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256325164] [2020-10-27 15:00:38,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 15:00:38,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:38,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 15:00:38,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-27 15:00:38,398 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 26 states. [2020-10-27 15:00:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:40,182 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 15:00:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 15:00:40,182 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-27 15:00:40,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:40,183 INFO L225 Difference]: With dead ends: 42 [2020-10-27 15:00:40,183 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 15:00:40,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 15:00:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 15:00:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 15:00:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 15:00:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-27 15:00:40,192 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-27 15:00:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:40,192 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-27 15:00:40,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 15:00:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-27 15:00:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 15:00:40,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:40,196 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:40,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 15:00:40,197 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:40,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:40,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2017311582, now seen corresponding path program 23 times [2020-10-27 15:00:40,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:40,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579975688] [2020-10-27 15:00:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:40,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:41,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:41,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 15:00:41,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:41,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-27 15:00:41,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 15:00:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 15:00:41,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:41,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:41,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:41,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:41,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:41,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:41,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:41,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:41,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:41,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:41,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:41,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:41,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579975688] [2020-10-27 15:00:41,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:41,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 15:00:41,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523510476] [2020-10-27 15:00:41,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 15:00:41,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:41,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 15:00:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-27 15:00:41,883 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-27 15:00:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:43,739 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-27 15:00:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 15:00:43,740 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-27 15:00:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:43,741 INFO L225 Difference]: With dead ends: 43 [2020-10-27 15:00:43,741 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 15:00:43,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 15:00:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 15:00:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 15:00:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 15:00:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-27 15:00:43,751 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-27 15:00:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:43,751 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-27 15:00:43,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 15:00:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-27 15:00:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 15:00:43,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:43,752 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:43,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 15:00:43,752 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:43,753 INFO L82 PathProgramCache]: Analyzing trace with hash -757562281, now seen corresponding path program 24 times [2020-10-27 15:00:43,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:43,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263939713] [2020-10-27 15:00:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:43,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:44,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:44,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 15:00:44,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-10-27 15:00:44,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 15:00:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 15:00:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:45,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:45,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:45,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:45,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:45,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:45,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:45,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:45,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:45,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:45,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:45,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:45,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263939713] [2020-10-27 15:00:45,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:45,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 15:00:45,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591065201] [2020-10-27 15:00:45,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 15:00:45,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:45,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 15:00:45,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-27 15:00:45,468 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-27 15:00:47,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:47,472 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 15:00:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 15:00:47,473 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-27 15:00:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:47,474 INFO L225 Difference]: With dead ends: 44 [2020-10-27 15:00:47,474 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 15:00:47,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 15:00:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 15:00:47,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 15:00:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 15:00:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 15:00:47,492 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-27 15:00:47,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:47,493 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 15:00:47,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 15:00:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 15:00:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 15:00:47,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:47,493 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:47,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 15:00:47,494 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:47,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:47,497 INFO L82 PathProgramCache]: Analyzing trace with hash -879306114, now seen corresponding path program 25 times [2020-10-27 15:00:47,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:47,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301300167] [2020-10-27 15:00:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:47,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:48,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:48,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 15:00:48,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:48,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 892 [2020-10-27 15:00:48,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 15:00:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 15:00:48,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:49,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:49,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:49,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:49,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:49,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:49,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:49,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:49,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:49,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:49,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:49,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301300167] [2020-10-27 15:00:49,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:49,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 15:00:49,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744905031] [2020-10-27 15:00:49,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 15:00:49,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 15:00:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-27 15:00:49,194 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-27 15:00:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:51,315 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-27 15:00:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 15:00:51,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-27 15:00:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:51,316 INFO L225 Difference]: With dead ends: 45 [2020-10-27 15:00:51,316 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 15:00:51,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 15:00:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 15:00:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 15:00:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 15:00:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-27 15:00:51,324 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-27 15:00:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:51,325 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-27 15:00:51,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 15:00:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-27 15:00:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 15:00:51,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:51,325 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:51,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 15:00:51,325 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:51,326 INFO L82 PathProgramCache]: Analyzing trace with hash -358397641, now seen corresponding path program 26 times [2020-10-27 15:00:51,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:51,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189675600] [2020-10-27 15:00:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:51,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:52,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:52,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 15:00:52,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:52,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-27 15:00:52,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:52,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 15:00:52,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:52,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 15:00:52,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:53,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:53,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:53,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:53,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:53,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:53,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:53,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:53,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:53,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:53,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189675600] [2020-10-27 15:00:53,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:53,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 15:00:53,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215565793] [2020-10-27 15:00:53,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 15:00:53,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 15:00:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-27 15:00:53,192 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 30 states. [2020-10-27 15:00:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:55,426 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 15:00:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 15:00:55,427 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-27 15:00:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:55,427 INFO L225 Difference]: With dead ends: 46 [2020-10-27 15:00:55,428 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 15:00:55,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 15:00:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 15:00:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 15:00:55,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 15:00:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 15:00:55,436 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-27 15:00:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:55,436 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 15:00:55,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 15:00:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 15:00:55,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 15:00:55,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:55,437 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:55,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 15:00:55,437 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:55,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:55,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1390104162, now seen corresponding path program 27 times [2020-10-27 15:00:55,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:55,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91609271] [2020-10-27 15:00:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:55,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:56,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:56,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 15:00:56,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:56,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-10-27 15:00:56,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:56,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 15:00:56,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:00:56,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 15:00:56,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:57,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:57,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:57,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:57,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:57,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:57,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:57,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:57,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:57,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:57,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:57,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:00:57,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91609271] [2020-10-27 15:00:57,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:57,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 15:00:57,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982286556] [2020-10-27 15:00:57,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 15:00:57,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:57,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 15:00:57,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-27 15:00:57,306 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 31 states. [2020-10-27 15:00:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:59,678 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-27 15:00:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 15:00:59,679 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-27 15:00:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:59,679 INFO L225 Difference]: With dead ends: 47 [2020-10-27 15:00:59,680 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 15:00:59,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 15:00:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 15:00:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 15:00:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 15:00:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-27 15:00:59,689 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-27 15:00:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:59,689 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-27 15:00:59,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 15:00:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-27 15:00:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 15:00:59,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:59,690 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:59,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 15:00:59,690 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:59,690 INFO L82 PathProgramCache]: Analyzing trace with hash 986732055, now seen corresponding path program 28 times [2020-10-27 15:00:59,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:59,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964058386] [2020-10-27 15:00:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:59,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:00,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:00,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 15:01:00,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:00,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1210 [2020-10-27 15:01:00,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 15:01:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:01:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 15:01:00,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:01,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:01,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:01,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:01,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:01,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:01,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:01,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:01,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:01:01,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964058386] [2020-10-27 15:01:01,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:01,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 15:01:01,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87532790] [2020-10-27 15:01:01,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 15:01:01,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:01,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 15:01:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-27 15:01:01,865 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-27 15:01:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:04,408 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 15:01:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 15:01:04,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-27 15:01:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:04,410 INFO L225 Difference]: With dead ends: 48 [2020-10-27 15:01:04,410 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 15:01:04,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 15:01:04,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 15:01:04,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 15:01:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 15:01:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-27 15:01:04,418 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-27 15:01:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:04,419 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-27 15:01:04,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 15:01:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-27 15:01:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 15:01:04,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:04,419 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:01:04,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 15:01:04,419 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1654210750, now seen corresponding path program 29 times [2020-10-27 15:01:04,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:04,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522075739] [2020-10-27 15:01:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:04,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:05,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:05,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 15:01:05,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:05,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-10-27 15:01:05,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:05,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 15:01:05,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:01:05,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 15:01:05,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:06,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:06,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:06,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:06,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:06,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:06,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:06,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:01:06,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522075739] [2020-10-27 15:01:06,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:06,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 15:01:06,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336669498] [2020-10-27 15:01:06,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 15:01:06,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 15:01:06,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 15:01:06,695 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-27 15:01:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:09,355 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-27 15:01:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 15:01:09,356 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-27 15:01:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:09,356 INFO L225 Difference]: With dead ends: 49 [2020-10-27 15:01:09,356 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 15:01:09,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 15:01:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 15:01:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 15:01:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 15:01:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 15:01:09,365 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-27 15:01:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:09,365 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 15:01:09,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 15:01:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 15:01:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 15:01:09,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:09,366 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:01:09,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 15:01:09,366 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:09,366 INFO L82 PathProgramCache]: Analyzing trace with hash 871213815, now seen corresponding path program 30 times [2020-10-27 15:01:09,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:09,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871430821] [2020-10-27 15:01:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:09,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:10,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:10,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 15:01:10,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:10,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1220 [2020-10-27 15:01:10,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:10,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 15:01:10,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:01:10,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 15:01:10,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:11,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:11,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:11,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:11,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:11,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:11,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:01:11,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:11,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:11,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:11,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:11,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:01:11,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871430821] [2020-10-27 15:01:11,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:11,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 15:01:11,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497588853] [2020-10-27 15:01:11,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 15:01:11,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:11,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 15:01:11,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 15:01:11,645 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-27 15:01:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:14,455 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 15:01:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 15:01:14,456 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-27 15:01:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:14,457 INFO L225 Difference]: With dead ends: 50 [2020-10-27 15:01:14,457 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 15:01:14,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 15:01:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 15:01:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 15:01:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 15:01:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-27 15:01:14,465 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-27 15:01:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:14,466 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-27 15:01:14,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 15:01:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-27 15:01:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 15:01:14,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:14,466 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:01:14,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 15:01:14,467 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1926854690, now seen corresponding path program 31 times [2020-10-27 15:01:14,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:14,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528358507] [2020-10-27 15:01:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:14,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:15,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:15,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 15:01:15,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:15,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1351 [2020-10-27 15:01:15,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:15,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 15:01:15,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:01:15,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 15:01:15,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:16,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:16,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:16,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:16,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:16,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:16,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:16,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:16,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:16,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:16,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:16,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:01:16,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528358507] [2020-10-27 15:01:16,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:16,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 15:01:16,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32643789] [2020-10-27 15:01:16,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 15:01:16,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:16,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 15:01:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 15:01:16,957 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 35 states. [2020-10-27 15:01:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:19,900 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-27 15:01:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 15:01:19,902 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-27 15:01:19,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:19,902 INFO L225 Difference]: With dead ends: 51 [2020-10-27 15:01:19,903 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 15:01:19,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=373, Invalid=4049, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 15:01:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 15:01:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 15:01:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 15:01:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-27 15:01:19,910 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-27 15:01:19,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:19,911 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-27 15:01:19,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 15:01:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-27 15:01:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 15:01:19,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:19,911 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:01:19,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 15:01:19,912 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1527334871, now seen corresponding path program 32 times [2020-10-27 15:01:19,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:19,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967600370] [2020-10-27 15:01:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:19,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:21,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:21,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 15:01:21,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:21,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-27 15:01:21,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:21,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 15:01:21,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:01:21,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 15:01:21,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:22,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:22,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:22,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:22,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:22,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:22,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:22,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:22,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:22,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:22,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:01:22,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967600370] [2020-10-27 15:01:22,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:22,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 15:01:22,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759434648] [2020-10-27 15:01:22,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 15:01:22,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 15:01:22,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 15:01:22,479 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-27 15:01:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:25,601 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 15:01:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 15:01:25,603 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-27 15:01:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:25,604 INFO L225 Difference]: With dead ends: 52 [2020-10-27 15:01:25,604 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 15:01:25,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 15:01:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 15:01:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 15:01:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 15:01:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 15:01:25,614 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-27 15:01:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:25,614 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 15:01:25,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 15:01:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 15:01:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 15:01:25,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:25,615 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:01:25,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 15:01:25,615 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1233028862, now seen corresponding path program 33 times [2020-10-27 15:01:25,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:25,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132717179] [2020-10-27 15:01:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:25,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:27,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:27,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 15:01:27,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:27,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1760 [2020-10-27 15:01:27,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:27,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 15:01:27,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:01:27,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 15:01:27,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:28,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:28,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:28,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:28,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:28,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:28,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:28,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:28,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:28,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:28,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:28,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:01:28,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132717179] [2020-10-27 15:01:28,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:28,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 15:01:28,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449876173] [2020-10-27 15:01:28,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 15:01:28,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:28,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 15:01:28,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 15:01:28,630 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 37 states. [2020-10-27 15:01:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:31,942 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-27 15:01:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 15:01:31,943 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-27 15:01:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:31,944 INFO L225 Difference]: With dead ends: 53 [2020-10-27 15:01:31,944 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 15:01:31,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 15:01:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 15:01:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 15:01:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 15:01:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-27 15:01:31,953 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-27 15:01:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:31,953 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-27 15:01:31,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 15:01:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-27 15:01:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 15:01:31,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:31,954 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:01:31,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 15:01:31,954 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:31,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:31,955 INFO L82 PathProgramCache]: Analyzing trace with hash 699477175, now seen corresponding path program 34 times [2020-10-27 15:01:31,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:31,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016041429] [2020-10-27 15:01:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:32,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:33,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:33,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 15:01:33,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:33,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1607 [2020-10-27 15:01:33,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:33,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 15:01:33,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:01:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 15:01:33,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:34,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:34,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:34,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:34,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:34,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:34,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:34,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:01:34,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016041429] [2020-10-27 15:01:34,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:34,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 15:01:34,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119846268] [2020-10-27 15:01:34,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 15:01:34,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:34,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 15:01:34,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 15:01:34,868 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 38 states. [2020-10-27 15:01:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:38,396 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 15:01:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 15:01:38,397 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-27 15:01:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:38,398 INFO L225 Difference]: With dead ends: 54 [2020-10-27 15:01:38,398 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 15:01:38,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 15:01:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 15:01:38,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 15:01:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 15:01:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-27 15:01:38,406 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-27 15:01:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:38,406 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-27 15:01:38,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 15:01:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-27 15:01:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 15:01:38,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:38,407 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:01:38,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 15:01:38,407 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:38,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1339244062, now seen corresponding path program 35 times [2020-10-27 15:01:38,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:38,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549499751] [2020-10-27 15:01:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:38,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:40,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:40,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 15:01:40,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:40,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1938 [2020-10-27 15:01:40,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:40,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 15:01:40,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:01:40,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 15:01:40,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:41,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:41,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:41,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:41,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:41,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:41,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:41,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:41,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:41,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:41,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:41,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:01:41,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549499751] [2020-10-27 15:01:41,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:41,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 15:01:41,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497496063] [2020-10-27 15:01:41,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 15:01:41,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 15:01:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 15:01:41,718 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 39 states. [2020-10-27 15:01:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:45,346 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-27 15:01:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 15:01:45,346 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-27 15:01:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:45,347 INFO L225 Difference]: With dead ends: 55 [2020-10-27 15:01:45,347 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 15:01:45,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 15:01:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 15:01:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 15:01:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 15:01:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-27 15:01:45,354 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-27 15:01:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:45,355 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-27 15:01:45,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 15:01:45,355 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-27 15:01:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 15:01:45,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:45,356 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:01:45,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 15:01:45,356 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:45,356 INFO L82 PathProgramCache]: Analyzing trace with hash -302818921, now seen corresponding path program 36 times [2020-10-27 15:01:45,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:45,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370434018] [2020-10-27 15:01:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:45,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:47,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:47,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 15:01:47,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:47,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2435 [2020-10-27 15:01:47,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:47,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 15:01:47,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:01:47,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 15:01:47,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:49,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:49,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:49,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:49,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:49,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:49,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:49,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:49,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:01:49,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370434018] [2020-10-27 15:01:49,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:49,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 15:01:49,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745032437] [2020-10-27 15:01:49,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 15:01:49,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:49,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 15:01:49,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 15:01:49,232 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-27 15:01:53,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:01:53,045 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 15:01:53,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 15:01:53,046 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-27 15:01:53,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:01:53,047 INFO L225 Difference]: With dead ends: 56 [2020-10-27 15:01:53,047 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 15:01:53,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 15:01:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 15:01:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 15:01:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 15:01:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-27 15:01:53,053 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-27 15:01:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:01:53,053 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-27 15:01:53,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 15:01:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-27 15:01:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 15:01:53,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:01:53,054 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:01:53,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 15:01:53,054 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:01:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:01:53,054 INFO L82 PathProgramCache]: Analyzing trace with hash 332836158, now seen corresponding path program 37 times [2020-10-27 15:01:53,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:01:53,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489019874] [2020-10-27 15:01:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:01:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:53,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:55,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:55,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 15:01:55,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:55,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2059 [2020-10-27 15:01:55,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:55,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 15:01:55,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:01:55,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 15:01:55,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:56,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:01:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:01:56,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:01:56,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:01:56,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:01:56,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:01:56,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:01:56,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:01:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:01:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:01:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:01:56,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:01:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:01:56,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489019874] [2020-10-27 15:01:56,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:01:56,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 15:01:56,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861297110] [2020-10-27 15:01:56,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 15:01:56,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:01:56,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 15:01:56,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 15:01:56,607 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-27 15:02:00,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:00,581 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-27 15:02:00,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 15:02:00,582 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-27 15:02:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:00,582 INFO L225 Difference]: With dead ends: 57 [2020-10-27 15:02:00,583 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 15:02:00,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 15:02:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 15:02:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 15:02:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 15:02:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-27 15:02:00,591 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-27 15:02:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:00,591 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-27 15:02:00,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 15:02:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-27 15:02:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 15:02:00,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:00,592 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:02:00,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 15:02:00,593 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:00,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1436692873, now seen corresponding path program 38 times [2020-10-27 15:02:00,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:00,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425673832] [2020-10-27 15:02:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:00,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:03,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:03,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 15:02:03,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:03,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2562 [2020-10-27 15:02:03,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:03,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 15:02:03,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:02:03,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 15:02:03,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:04,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:04,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:04,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:04,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:04,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:04,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:04,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:04,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:02:04,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425673832] [2020-10-27 15:02:04,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:04,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 15:02:04,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993987162] [2020-10-27 15:02:04,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 15:02:04,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:04,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 15:02:04,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 15:02:04,720 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-27 15:02:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:08,874 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 15:02:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 15:02:08,874 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-27 15:02:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:08,875 INFO L225 Difference]: With dead ends: 58 [2020-10-27 15:02:08,875 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 15:02:08,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 15:02:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 15:02:08,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 15:02:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 15:02:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-27 15:02:08,884 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-27 15:02:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:08,884 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-27 15:02:08,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 15:02:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-27 15:02:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 15:02:08,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:08,885 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:02:08,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 15:02:08,885 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:08,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:08,885 INFO L82 PathProgramCache]: Analyzing trace with hash -457517986, now seen corresponding path program 39 times [2020-10-27 15:02:08,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:08,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814997617] [2020-10-27 15:02:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:08,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:11,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:11,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 15:02:11,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:11,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2183 [2020-10-27 15:02:11,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:11,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 15:02:11,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:02:11,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 15:02:11,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:12,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:12,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:12,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:12,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:12,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:12,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:02:12,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:12,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:02:12,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814997617] [2020-10-27 15:02:12,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:12,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 15:02:12,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074641637] [2020-10-27 15:02:12,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 15:02:12,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:12,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 15:02:12,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 15:02:12,710 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 43 states. [2020-10-27 15:02:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:17,056 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-27 15:02:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 15:02:17,057 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-27 15:02:17,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:17,058 INFO L225 Difference]: With dead ends: 59 [2020-10-27 15:02:17,058 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 15:02:17,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 15:02:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 15:02:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 15:02:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 15:02:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-27 15:02:17,067 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-27 15:02:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:17,067 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-27 15:02:17,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 15:02:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-27 15:02:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 15:02:17,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:17,068 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:02:17,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 15:02:17,068 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:17,068 INFO L82 PathProgramCache]: Analyzing trace with hash -167867561, now seen corresponding path program 40 times [2020-10-27 15:02:17,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:17,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586962439] [2020-10-27 15:02:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:17,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:20,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:20,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 15:02:20,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:20,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3086 [2020-10-27 15:02:20,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:20,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 15:02:20,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:02:20,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 15:02:20,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:21,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:21,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:21,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:21,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:21,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:21,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:21,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:21,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:21,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:21,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:21,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:02:21,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586962439] [2020-10-27 15:02:21,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:21,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 15:02:21,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166140110] [2020-10-27 15:02:21,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 15:02:21,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:21,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 15:02:21,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 15:02:21,885 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-27 15:02:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:26,492 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 15:02:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 15:02:26,493 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-27 15:02:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:26,494 INFO L225 Difference]: With dead ends: 60 [2020-10-27 15:02:26,494 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 15:02:26,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 15:02:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 15:02:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 15:02:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 15:02:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-27 15:02:26,500 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-27 15:02:26,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:26,500 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-27 15:02:26,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 15:02:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-27 15:02:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 15:02:26,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:26,501 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:02:26,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 15:02:26,501 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:26,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:26,502 INFO L82 PathProgramCache]: Analyzing trace with hash 221361022, now seen corresponding path program 41 times [2020-10-27 15:02:26,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:26,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359029375] [2020-10-27 15:02:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:26,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:29,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:29,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 15:02:29,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:29,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3172 [2020-10-27 15:02:29,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 15:02:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:02:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 15:02:29,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:31,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:31,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:31,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:31,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:31,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:31,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:31,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:31,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:31,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:31,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:31,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:02:31,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359029375] [2020-10-27 15:02:31,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:31,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 15:02:31,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818031602] [2020-10-27 15:02:31,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 15:02:31,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:31,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 15:02:31,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 15:02:31,509 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 45 states. [2020-10-27 15:02:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:36,244 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-27 15:02:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 15:02:36,244 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-27 15:02:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:36,246 INFO L225 Difference]: With dead ends: 61 [2020-10-27 15:02:36,246 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 15:02:36,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=493, Invalid=6989, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 15:02:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 15:02:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 15:02:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 15:02:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-27 15:02:36,255 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-27 15:02:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:36,255 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-27 15:02:36,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 15:02:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-27 15:02:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 15:02:36,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:36,256 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:02:36,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 15:02:36,256 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:36,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:36,257 INFO L82 PathProgramCache]: Analyzing trace with hash -597454793, now seen corresponding path program 42 times [2020-10-27 15:02:36,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:36,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730207870] [2020-10-27 15:02:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:36,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:39,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:39,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 15:02:39,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:39,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3457 [2020-10-27 15:02:39,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:39,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 15:02:39,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:02:39,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 15:02:39,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:41,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:41,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:41,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:41,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:41,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:41,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:41,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:41,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:02:41,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730207870] [2020-10-27 15:02:41,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:41,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 15:02:41,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315614016] [2020-10-27 15:02:41,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 15:02:41,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 15:02:41,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 15:02:41,593 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-27 15:02:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:46,598 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 15:02:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 15:02:46,599 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-27 15:02:46,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:46,600 INFO L225 Difference]: With dead ends: 62 [2020-10-27 15:02:46,600 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 15:02:46,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 15:02:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 15:02:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 15:02:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 15:02:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-27 15:02:46,609 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-27 15:02:46,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:46,609 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-27 15:02:46,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 15:02:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-27 15:02:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 15:02:46,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:46,610 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:02:46,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 15:02:46,610 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:46,610 INFO L82 PathProgramCache]: Analyzing trace with hash -210941282, now seen corresponding path program 43 times [2020-10-27 15:02:46,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:46,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324239650] [2020-10-27 15:02:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:46,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:49,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:49,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 15:02:49,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:49,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3144 [2020-10-27 15:02:49,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:49,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 15:02:49,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:02:49,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 15:02:49,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:51,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:02:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:51,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:02:51,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:02:51,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:02:51,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:02:51,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:02:51,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:02:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:02:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:02:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:02:51,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:02:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:02:51,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324239650] [2020-10-27 15:02:51,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:02:51,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 15:02:51,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112882588] [2020-10-27 15:02:51,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 15:02:51,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:02:51,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 15:02:51,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 15:02:51,716 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 47 states. [2020-10-27 15:02:56,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:02:56,940 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-27 15:02:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 15:02:56,941 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-27 15:02:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:02:56,942 INFO L225 Difference]: With dead ends: 63 [2020-10-27 15:02:56,942 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 15:02:56,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=267, Invalid=7923, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 15:02:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 15:02:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 15:02:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 15:02:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-27 15:02:56,948 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-27 15:02:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:02:56,949 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-27 15:02:56,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 15:02:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-27 15:02:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 15:02:56,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:02:56,949 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:02:56,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 15:02:56,950 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:02:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:02:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1113924329, now seen corresponding path program 44 times [2020-10-27 15:02:56,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:02:56,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521383784] [2020-10-27 15:02:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:02:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:02:57,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:00,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:00,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 15:03:00,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:00,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3398 [2020-10-27 15:03:00,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 15:03:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:03:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 15:03:00,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:02,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:03:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:02,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:02,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:02,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:03:02,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:02,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:03:02,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:02,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:03:02,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:02,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:03:02,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:03:02,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521383784] [2020-10-27 15:03:02,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:03:02,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 15:03:02,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006392543] [2020-10-27 15:03:02,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 15:03:02,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:03:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 15:03:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 15:03:02,414 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-10-27 15:03:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:03:07,821 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 15:03:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 15:03:07,822 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-27 15:03:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:03:07,823 INFO L225 Difference]: With dead ends: 64 [2020-10-27 15:03:07,823 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 15:03:07,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 15:03:07,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 15:03:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 15:03:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 15:03:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-27 15:03:07,831 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-27 15:03:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:03:07,832 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-27 15:03:07,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 15:03:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-27 15:03:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 15:03:07,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:03:07,832 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:03:07,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 15:03:07,833 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:03:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:03:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash 958372286, now seen corresponding path program 45 times [2020-10-27 15:03:07,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:03:07,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140428260] [2020-10-27 15:03:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:03:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:07,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:12,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:12,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 15:03:12,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:12,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4195 [2020-10-27 15:03:12,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:12,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 15:03:12,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:03:12,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 15:03:12,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:14,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:03:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:14,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:14,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:14,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:03:14,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:14,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:03:14,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:03:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:03:14,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:03:14,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140428260] [2020-10-27 15:03:14,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:03:14,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 15:03:14,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204397285] [2020-10-27 15:03:14,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 15:03:14,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:03:14,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 15:03:14,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 15:03:14,166 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-27 15:03:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:03:19,819 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-27 15:03:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 15:03:19,820 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-27 15:03:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:03:19,821 INFO L225 Difference]: With dead ends: 65 [2020-10-27 15:03:19,821 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 15:03:19,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=279, Invalid=8651, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 15:03:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 15:03:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 15:03:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 15:03:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-27 15:03:19,830 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-27 15:03:19,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:03:19,830 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-27 15:03:19,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 15:03:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-27 15:03:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 15:03:19,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:03:19,831 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:03:19,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 15:03:19,831 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:03:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:03:19,832 INFO L82 PathProgramCache]: Analyzing trace with hash 775057911, now seen corresponding path program 46 times [2020-10-27 15:03:19,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:03:19,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104207006] [2020-10-27 15:03:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:03:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:19,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:24,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:24,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 15:03:24,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:24,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4458 [2020-10-27 15:03:24,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:24,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 15:03:24,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:03:24,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 15:03:24,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:26,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:03:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:26,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:26,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:26,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:03:26,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:26,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:03:26,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:03:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:03:26,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:03:26,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104207006] [2020-10-27 15:03:26,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:03:26,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 15:03:26,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158162640] [2020-10-27 15:03:26,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 15:03:26,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:03:26,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 15:03:26,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 15:03:26,529 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 50 states. [2020-10-27 15:03:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:03:32,420 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 15:03:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 15:03:32,421 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-27 15:03:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:03:32,422 INFO L225 Difference]: With dead ends: 66 [2020-10-27 15:03:32,422 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 15:03:32,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=285, Invalid=9027, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 15:03:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 15:03:32,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 15:03:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 15:03:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-27 15:03:32,431 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-27 15:03:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:03:32,431 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-27 15:03:32,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 15:03:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-27 15:03:32,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 15:03:32,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:03:32,432 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:03:32,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 15:03:32,432 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:03:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:03:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash -612720418, now seen corresponding path program 47 times [2020-10-27 15:03:32,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:03:32,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589053908] [2020-10-27 15:03:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:03:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:32,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:36,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:36,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 15:03:36,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:36,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4434 [2020-10-27 15:03:36,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:36,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 15:03:36,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:03:36,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 15:03:36,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:39,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:03:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:39,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:39,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:39,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:03:39,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:39,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:03:39,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:39,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:03:39,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:39,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:03:39,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:03:39,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589053908] [2020-10-27 15:03:39,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:03:39,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 15:03:39,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099614111] [2020-10-27 15:03:39,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 15:03:39,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:03:39,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 15:03:39,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 15:03:39,301 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 51 states. [2020-10-27 15:03:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:03:45,409 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-27 15:03:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 15:03:45,410 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 59 [2020-10-27 15:03:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:03:45,411 INFO L225 Difference]: With dead ends: 67 [2020-10-27 15:03:45,412 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 15:03:45,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=291, Invalid=9411, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 15:03:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 15:03:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 15:03:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 15:03:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-27 15:03:45,419 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-27 15:03:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:03:45,419 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-27 15:03:45,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 15:03:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-27 15:03:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 15:03:45,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:03:45,420 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:03:45,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 15:03:45,420 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:03:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:03:45,421 INFO L82 PathProgramCache]: Analyzing trace with hash -684175657, now seen corresponding path program 48 times [2020-10-27 15:03:45,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:03:45,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114783389] [2020-10-27 15:03:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:03:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:45,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:50,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:50,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 15:03:50,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:50,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4613 [2020-10-27 15:03:50,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:50,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 15:03:50,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 15:03:50,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 15:03:50,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:52,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:03:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:52,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:03:52,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:03:52,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:03:52,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:03:52,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:03:52,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:03:52,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:03:52,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:03:52,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:03:52,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:03:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:03:52,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114783389] [2020-10-27 15:03:52,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:03:52,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 15:03:52,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603257839] [2020-10-27 15:03:52,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 15:03:52,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:03:52,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 15:03:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 15:03:52,439 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 52 states. [2020-10-27 15:03:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:03:58,812 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 15:03:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 15:03:58,813 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-27 15:03:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:03:58,814 INFO L225 Difference]: With dead ends: 68 [2020-10-27 15:03:58,814 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 15:03:58,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=297, Invalid=9803, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 15:03:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 15:03:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-27 15:03:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 15:03:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-27 15:03:58,823 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-27 15:03:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:03:58,824 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-27 15:03:58,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 15:03:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-27 15:03:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 15:03:58,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:03:58,824 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:03:58,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 15:03:58,825 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:03:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:03:58,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1395679230, now seen corresponding path program 49 times [2020-10-27 15:03:58,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:03:58,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505533441] [2020-10-27 15:03:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:03:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:03:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking...