/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:32:37,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:32:37,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:32:37,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:32:37,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:32:37,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:32:37,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:32:37,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:32:37,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:32:37,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:32:37,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:32:37,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:32:37,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:32:37,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:32:37,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:32:37,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:32:37,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:32:37,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:32:37,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:32:37,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:32:37,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:32:37,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:32:37,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:32:37,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:32:37,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:32:37,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:32:37,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:32:37,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:32:37,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:32:37,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:32:37,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:32:37,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:32:37,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:32:37,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:32:37,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:32:37,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:32:37,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:32:37,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:32:37,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:32:37,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:32:37,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:32:37,983 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 [2020-09-25 12:32:38,031 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:32:38,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:32:38,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:32:38,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:32:38,035 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:32:38,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:32:38,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:32:38,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:32:38,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:32:38,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:32:38,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:32:38,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:32:38,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:32:38,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:32:38,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:32:38,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:32:38,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:32:38,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:32:38,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:32:38,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:32:38,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:32:38,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:32:38,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:32:38,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:32:38,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:32:38,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:32:38,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:32:38,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:32:38,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:32:38,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:32:38,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:32:38,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:32:38,511 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:32:38,513 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:32:38,513 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:32:38,514 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-25 12:32:38,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ca6ba46a/58730d02f16e426aa2b94b3a6b4fb2a7/FLAGf3fc3f3df [2020-09-25 12:32:39,150 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:32:39,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-25 12:32:39,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ca6ba46a/58730d02f16e426aa2b94b3a6b4fb2a7/FLAGf3fc3f3df [2020-09-25 12:32:39,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ca6ba46a/58730d02f16e426aa2b94b3a6b4fb2a7 [2020-09-25 12:32:39,502 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:32:39,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:32:39,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:32:39,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:32:39,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:32:39,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:32:39" (1/1) ... [2020-09-25 12:32:39,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243023c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39, skipping insertion in model container [2020-09-25 12:32:39,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:32:39" (1/1) ... [2020-09-25 12:32:39,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:32:39,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:32:39,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:32:39,778 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:32:39,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:32:39,820 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:32:39,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39 WrapperNode [2020-09-25 12:32:39,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:32:39,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:32:39,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:32:39,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:32:39,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39" (1/1) ... [2020-09-25 12:32:39,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39" (1/1) ... [2020-09-25 12:32:39,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39" (1/1) ... [2020-09-25 12:32:39,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39" (1/1) ... [2020-09-25 12:32:39,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39" (1/1) ... [2020-09-25 12:32:39,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39" (1/1) ... [2020-09-25 12:32:39,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39" (1/1) ... [2020-09-25 12:32:39,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:32:39,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:32:39,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:32:39,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:32:39,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39" (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 [2020-09-25 12:32:40,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:32:40,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:32:40,028 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 12:32:40,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 12:32:40,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:32:40,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:32:40,029 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 12:32:40,030 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 12:32:40,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 12:32:40,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 12:32:40,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:32:40,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:32:40,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:32:40,370 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:32:40,370 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 12:32:40,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:32:40 BoogieIcfgContainer [2020-09-25 12:32:40,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:32:40,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:32:40,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:32:40,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:32:40,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:32:39" (1/3) ... [2020-09-25 12:32:40,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3623ee4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:32:40, skipping insertion in model container [2020-09-25 12:32:40,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:32:39" (2/3) ... [2020-09-25 12:32:40,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3623ee4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:32:40, skipping insertion in model container [2020-09-25 12:32:40,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:32:40" (3/3) ... [2020-09-25 12:32:40,386 INFO L109 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-09-25 12:32:40,397 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:32:40,407 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:32:40,430 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:32:40,459 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:32:40,459 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:32:40,459 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:32:40,459 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:32:40,460 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:32:40,460 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:32:40,460 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:32:40,460 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:32:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-09-25 12:32:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 12:32:40,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:40,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:40,492 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:40,499 INFO L82 PathProgramCache]: Analyzing trace with hash 288343897, now seen corresponding path program 1 times [2020-09-25 12:32:40,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:40,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061797487] [2020-09-25 12:32:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:40,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:40,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:40,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 12:32:40,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:40,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-25 12:32:40,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:40,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:40,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:40,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 12:32:40,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:40,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 12:32:40,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:40,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:40,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:40,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:40,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:40,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:32:40,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:40,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:40,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:40,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:40,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061797487] [2020-09-25 12:32:40,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:32:40,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 12:32:40,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707664344] [2020-09-25 12:32:40,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 12:32:40,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:40,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 12:32:40,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 12:32:40,821 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 2 states. [2020-09-25 12:32:40,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:40,853 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-09-25 12:32:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 12:32:40,854 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-09-25 12:32:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:40,867 INFO L225 Difference]: With dead ends: 75 [2020-09-25 12:32:40,867 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 12:32:40,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 12:32:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 12:32:40,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-25 12:32:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-25 12:32:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-09-25 12:32:40,915 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 27 [2020-09-25 12:32:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:40,915 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-09-25 12:32:40,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 12:32:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-09-25 12:32:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 12:32:40,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:40,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:40,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:32:40,918 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:40,919 INFO L82 PathProgramCache]: Analyzing trace with hash 320540924, now seen corresponding path program 1 times [2020-09-25 12:32:40,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:40,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503884954] [2020-09-25 12:32:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:41,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:41,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 12:32:41,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:41,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-09-25 12:32:41,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:41,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:41,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:32:41,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 12:32:41,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 12:32:41,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:41,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:41,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:41,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:41,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:41,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:41,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:32:41,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:41,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:41,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:41,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:41,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:41,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:41,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503884954] [2020-09-25 12:32:41,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:32:41,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:32:41,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177657533] [2020-09-25 12:32:41,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:32:41,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:41,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:32:41,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:32:41,217 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2020-09-25 12:32:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:41,323 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-09-25 12:32:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:32:41,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-25 12:32:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:41,326 INFO L225 Difference]: With dead ends: 67 [2020-09-25 12:32:41,326 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 12:32:41,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:32:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 12:32:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-09-25 12:32:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 12:32:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-25 12:32:41,336 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2020-09-25 12:32:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:41,337 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-25 12:32:41,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:32:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-25 12:32:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 12:32:41,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:41,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:41,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:32:41,339 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:41,339 INFO L82 PathProgramCache]: Analyzing trace with hash 751787059, now seen corresponding path program 1 times [2020-09-25 12:32:41,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:41,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223346135] [2020-09-25 12:32:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:41,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:41,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:41,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 12:32:41,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:41,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-09-25 12:32:41,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:41,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:41,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:32:41,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:32:41,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 12:32:41,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:41,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:41,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:41,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:41,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:41,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:41,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:32:41,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:41,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:41,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:41,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:41,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:41,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:41,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223346135] [2020-09-25 12:32:41,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:41,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 12:32:41,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421364677] [2020-09-25 12:32:41,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 12:32:41,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:41,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 12:32:41,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:32:41,679 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 7 states. [2020-09-25 12:32:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:41,826 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-25 12:32:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 12:32:41,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-09-25 12:32:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:41,829 INFO L225 Difference]: With dead ends: 88 [2020-09-25 12:32:41,830 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 12:32:41,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:32:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 12:32:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-09-25 12:32:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-25 12:32:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-25 12:32:41,858 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 37 [2020-09-25 12:32:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:41,858 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-25 12:32:41,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 12:32:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-25 12:32:41,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 12:32:41,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:41,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:41,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:32:41,863 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash 3796503, now seen corresponding path program 1 times [2020-09-25 12:32:41,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:41,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689581555] [2020-09-25 12:32:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:41,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:42,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:42,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 12:32:42,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:42,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-25 12:32:42,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:42,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:42,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:32:42,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:32:42,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 12:32:42,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:42,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:42,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:42,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:42,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:42,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:42,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:32:42,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:42,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:42,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:42,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:42,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:42,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:42,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689581555] [2020-09-25 12:32:42,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:42,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 12:32:42,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434784251] [2020-09-25 12:32:42,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 12:32:42,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:42,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 12:32:42,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:32:42,094 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 7 states. [2020-09-25 12:32:42,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:42,247 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-09-25 12:32:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 12:32:42,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 12:32:42,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:42,259 INFO L225 Difference]: With dead ends: 105 [2020-09-25 12:32:42,259 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 12:32:42,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:32:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 12:32:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-09-25 12:32:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 12:32:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 12:32:42,284 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 38 [2020-09-25 12:32:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:42,285 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 12:32:42,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 12:32:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 12:32:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 12:32:42,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:42,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:42,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:32:42,289 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:42,291 INFO L82 PathProgramCache]: Analyzing trace with hash 197728887, now seen corresponding path program 1 times [2020-09-25 12:32:42,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:42,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223860375] [2020-09-25 12:32:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:42,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:42,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:42,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 12:32:42,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:42,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-09-25 12:32:42,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:42,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:32:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:32:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 12:32:42,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:42,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:42,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:42,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:42,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:42,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:42,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:32:42,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:42,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:42,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:42,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223860375] [2020-09-25 12:32:42,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:42,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 12:32:42,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141997340] [2020-09-25 12:32:42,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 12:32:42,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 12:32:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:32:42,515 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 7 states. [2020-09-25 12:32:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:42,623 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-09-25 12:32:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 12:32:42,623 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 12:32:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:42,625 INFO L225 Difference]: With dead ends: 116 [2020-09-25 12:32:42,625 INFO L226 Difference]: Without dead ends: 114 [2020-09-25 12:32:42,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:32:42,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-25 12:32:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2020-09-25 12:32:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-25 12:32:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2020-09-25 12:32:42,639 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 38 [2020-09-25 12:32:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:42,640 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2020-09-25 12:32:42,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 12:32:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2020-09-25 12:32:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 12:32:42,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:42,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:42,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:32:42,643 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 88652198, now seen corresponding path program 1 times [2020-09-25 12:32:42,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:42,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214326158] [2020-09-25 12:32:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:42,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:42,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:43,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:43,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 12:32:43,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:32:43,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-09-25 12:32:43,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:43,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:43,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:32:43,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:32:43,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 12:32:43,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:32:43,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:43,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:43,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:43,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:43,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:43,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:32:43,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:43,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:43,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:43,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:43,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:43,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 12:32:43,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 12:32:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:43,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:43,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:43,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:32:43,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:43,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 12:32:43,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:43,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:32:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:43,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:32:43,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:43,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214326158] [2020-09-25 12:32:43,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:43,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:32:43,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004643255] [2020-09-25 12:32:43,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:32:43,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:32:43,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:32:43,876 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand 9 states. [2020-09-25 12:32:44,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:44,076 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-09-25 12:32:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:32:44,077 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 12:32:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:44,079 INFO L225 Difference]: With dead ends: 129 [2020-09-25 12:32:44,082 INFO L226 Difference]: Without dead ends: 127 [2020-09-25 12:32:44,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:32:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-25 12:32:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 110. [2020-09-25 12:32:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 12:32:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-09-25 12:32:44,108 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 49 [2020-09-25 12:32:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:44,108 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-09-25 12:32:44,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:32:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-09-25 12:32:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 12:32:44,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:44,116 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:44,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 12:32:44,117 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:44,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:44,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1084443264, now seen corresponding path program 1 times [2020-09-25 12:32:44,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:44,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501036318] [2020-09-25 12:32:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:44,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:44,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:44,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:44,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:44,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 12:32:44,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:32:44,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-09-25 12:32:44,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:44,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:44,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:32:44,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:32:44,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 12:32:44,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:44,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:44,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:44,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:44,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:44,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:44,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:32:44,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:44,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:44,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:44,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501036318] [2020-09-25 12:32:44,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:44,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:32:44,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644941958] [2020-09-25 12:32:44,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:32:44,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:44,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:32:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:32:44,934 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 9 states. [2020-09-25 12:32:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:45,185 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2020-09-25 12:32:45,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:32:45,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 12:32:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:45,188 INFO L225 Difference]: With dead ends: 164 [2020-09-25 12:32:45,188 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 12:32:45,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:32:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 12:32:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-09-25 12:32:45,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-25 12:32:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-09-25 12:32:45,232 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 48 [2020-09-25 12:32:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:45,233 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-09-25 12:32:45,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:32:45,233 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-09-25 12:32:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 12:32:45,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:45,235 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:45,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 12:32:45,235 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:45,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1278375648, now seen corresponding path program 1 times [2020-09-25 12:32:45,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:45,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963767698] [2020-09-25 12:32:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:45,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:45,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:45,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:45,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 12:32:45,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:32:45,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-09-25 12:32:45,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:45,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:45,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:32:45,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:32:45,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 12:32:45,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 12:32:46,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:46,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:46,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:46,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:46,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:46,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:32:46,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:46,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:46,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:46,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:46,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963767698] [2020-09-25 12:32:46,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:46,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:32:46,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760805854] [2020-09-25 12:32:46,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:32:46,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:46,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:32:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:32:46,022 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 9 states. [2020-09-25 12:32:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:46,271 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2020-09-25 12:32:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:32:46,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 12:32:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:46,274 INFO L225 Difference]: With dead ends: 185 [2020-09-25 12:32:46,275 INFO L226 Difference]: Without dead ends: 183 [2020-09-25 12:32:46,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:32:46,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-25 12:32:46,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2020-09-25 12:32:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-25 12:32:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2020-09-25 12:32:46,300 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 48 [2020-09-25 12:32:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:46,301 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2020-09-25 12:32:46,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:32:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2020-09-25 12:32:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 12:32:46,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:46,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:46,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 12:32:46,304 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:46,304 INFO L82 PathProgramCache]: Analyzing trace with hash -287517810, now seen corresponding path program 2 times [2020-09-25 12:32:46,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:46,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112642611] [2020-09-25 12:32:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:46,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:46,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:46,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:46,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 12:32:46,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:32:46,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-09-25 12:32:46,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:46,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:46,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:32:46,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:32:46,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 12:32:46,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:46,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:46,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:46,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:46,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:46,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:46,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:32:46,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:46,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:46,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:46,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:46,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112642611] [2020-09-25 12:32:46,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:46,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:32:46,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156248998] [2020-09-25 12:32:46,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:32:46,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:32:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:32:46,955 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand 9 states. [2020-09-25 12:32:47,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:47,188 INFO L93 Difference]: Finished difference Result 227 states and 262 transitions. [2020-09-25 12:32:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 12:32:47,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 12:32:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:47,192 INFO L225 Difference]: With dead ends: 227 [2020-09-25 12:32:47,192 INFO L226 Difference]: Without dead ends: 225 [2020-09-25 12:32:47,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 12:32:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-25 12:32:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 184. [2020-09-25 12:32:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-25 12:32:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2020-09-25 12:32:47,207 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 48 [2020-09-25 12:32:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:47,207 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2020-09-25 12:32:47,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:32:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2020-09-25 12:32:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 12:32:47,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:47,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:47,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 12:32:47,210 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:47,211 INFO L82 PathProgramCache]: Analyzing trace with hash 942147566, now seen corresponding path program 2 times [2020-09-25 12:32:47,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:47,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267161748] [2020-09-25 12:32:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:47,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:47,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:47,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:47,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:47,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 12:32:47,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:32:47,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-09-25 12:32:47,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:47,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:47,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:32:47,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:32:47,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 12:32:47,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:47,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:47,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:47,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:47,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:47,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:47,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:32:47,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:47,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:47,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:47,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267161748] [2020-09-25 12:32:47,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:47,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:32:47,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152267642] [2020-09-25 12:32:47,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:32:47,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:32:47,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:32:47,838 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand 9 states. [2020-09-25 12:32:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:48,013 INFO L93 Difference]: Finished difference Result 257 states and 299 transitions. [2020-09-25 12:32:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 12:32:48,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-09-25 12:32:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:48,016 INFO L225 Difference]: With dead ends: 257 [2020-09-25 12:32:48,016 INFO L226 Difference]: Without dead ends: 255 [2020-09-25 12:32:48,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 12:32:48,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-25 12:32:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 215. [2020-09-25 12:32:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-25 12:32:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-25 12:32:48,029 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 48 [2020-09-25 12:32:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:48,030 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-25 12:32:48,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:32:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-25 12:32:48,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 12:32:48,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:48,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:48,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 12:32:48,031 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:48,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1391225462, now seen corresponding path program 1 times [2020-09-25 12:32:48,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:48,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58858759] [2020-09-25 12:32:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:48,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:48,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:48,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:48,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:48,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 12:32:48,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:32:48,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-09-25 12:32:48,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:48,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:48,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:32:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:32:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 12:32:48,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:48,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:48,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:48,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:48,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:48,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:48,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:32:48,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:48,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:48,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:49,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 12:32:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:49,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:49,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:49,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:32:49,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:49,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 12:32:49,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:49,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:49,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:32:49,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:49,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:32:49,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:49,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58858759] [2020-09-25 12:32:49,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:49,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:32:49,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188494373] [2020-09-25 12:32:49,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:32:49,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:49,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:32:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:32:49,019 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-25 12:32:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:49,188 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2020-09-25 12:32:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:32:49,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 12:32:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:49,190 INFO L225 Difference]: With dead ends: 245 [2020-09-25 12:32:49,190 INFO L226 Difference]: Without dead ends: 243 [2020-09-25 12:32:49,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:32:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-25 12:32:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2020-09-25 12:32:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-25 12:32:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2020-09-25 12:32:49,201 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 50 [2020-09-25 12:32:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:49,202 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2020-09-25 12:32:49,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:32:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2020-09-25 12:32:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 12:32:49,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:49,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:49,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 12:32:49,203 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:49,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1955950980, now seen corresponding path program 1 times [2020-09-25 12:32:49,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:49,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143511499] [2020-09-25 12:32:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:49,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:49,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:49,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:49,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:49,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 12:32:49,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:32:49,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-09-25 12:32:49,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:49,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:49,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:32:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:32:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 12:32:49,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:49,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:49,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:49,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:49,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:49,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:49,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:32:49,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:49,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:49,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:32:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:49,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143511499] [2020-09-25 12:32:49,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:49,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:32:49,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744295418] [2020-09-25 12:32:49,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:32:49,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:49,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:32:49,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:32:49,849 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand 9 states. [2020-09-25 12:32:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:50,049 INFO L93 Difference]: Finished difference Result 286 states and 334 transitions. [2020-09-25 12:32:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 12:32:50,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 12:32:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:50,052 INFO L225 Difference]: With dead ends: 286 [2020-09-25 12:32:50,052 INFO L226 Difference]: Without dead ends: 284 [2020-09-25 12:32:50,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-25 12:32:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-25 12:32:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2020-09-25 12:32:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-09-25 12:32:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 269 transitions. [2020-09-25 12:32:50,065 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 269 transitions. Word has length 49 [2020-09-25 12:32:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:50,066 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 269 transitions. [2020-09-25 12:32:50,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:32:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 269 transitions. [2020-09-25 12:32:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 12:32:50,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:50,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:50,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 12:32:50,068 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:50,068 INFO L82 PathProgramCache]: Analyzing trace with hash -798805526, now seen corresponding path program 1 times [2020-09-25 12:32:50,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:50,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212729837] [2020-09-25 12:32:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:50,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:50,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:50,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:50,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:50,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 12:32:50,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:32:50,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 794 [2020-09-25 12:32:50,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:50,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:50,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:32:50,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:32:50,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 12:32:50,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:50,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:50,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:50,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:50,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:50,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:50,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:32:50,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:50,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:50,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:50,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:50,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:50,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:50,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 12:32:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:50,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:50,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:50,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:32:50,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:50,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 12:32:50,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:50,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:32:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:50,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:32:50,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:32:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:50,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212729837] [2020-09-25 12:32:50,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:50,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:32:50,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109948386] [2020-09-25 12:32:50,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:32:50,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:50,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:32:50,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:32:50,963 INFO L87 Difference]: Start difference. First operand 227 states and 269 transitions. Second operand 9 states. [2020-09-25 12:32:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:51,135 INFO L93 Difference]: Finished difference Result 268 states and 313 transitions. [2020-09-25 12:32:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:32:51,136 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 12:32:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:51,138 INFO L225 Difference]: With dead ends: 268 [2020-09-25 12:32:51,138 INFO L226 Difference]: Without dead ends: 266 [2020-09-25 12:32:51,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:32:51,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-25 12:32:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 238. [2020-09-25 12:32:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-09-25 12:32:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 283 transitions. [2020-09-25 12:32:51,152 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 283 transitions. Word has length 50 [2020-09-25 12:32:51,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:51,152 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 283 transitions. [2020-09-25 12:32:51,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:32:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 283 transitions. [2020-09-25 12:32:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 12:32:51,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:51,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:51,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 12:32:51,154 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004924, now seen corresponding path program 2 times [2020-09-25 12:32:51,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:51,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593934008] [2020-09-25 12:32:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:51,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:51,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:51,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:51,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:51,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 12:32:51,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:32:51,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-09-25 12:32:51,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:51,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:32:51,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:32:51,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 12:32:51,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:51,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:51,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:51,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:51,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:51,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:51,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:32:51,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:51,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:51,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:51,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:51,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:51,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:32:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:51,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593934008] [2020-09-25 12:32:51,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:51,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:32:51,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734881640] [2020-09-25 12:32:51,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:32:51,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:32:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:32:51,721 INFO L87 Difference]: Start difference. First operand 238 states and 283 transitions. Second operand 9 states. [2020-09-25 12:32:51,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:51,924 INFO L93 Difference]: Finished difference Result 302 states and 354 transitions. [2020-09-25 12:32:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:32:51,925 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 12:32:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:51,927 INFO L225 Difference]: With dead ends: 302 [2020-09-25 12:32:51,927 INFO L226 Difference]: Without dead ends: 300 [2020-09-25 12:32:51,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:32:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-09-25 12:32:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 260. [2020-09-25 12:32:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-25 12:32:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 311 transitions. [2020-09-25 12:32:51,941 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 311 transitions. Word has length 49 [2020-09-25 12:32:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:51,942 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 311 transitions. [2020-09-25 12:32:51,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:32:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 311 transitions. [2020-09-25 12:32:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 12:32:51,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:51,943 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:51,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 12:32:51,944 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:51,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1367702887, now seen corresponding path program 2 times [2020-09-25 12:32:51,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:51,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050387444] [2020-09-25 12:32:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:51,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:51,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:52,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:52,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:52,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:54,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:54,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 12:32:54,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 12:32:54,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2105 [2020-09-25 12:32:54,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:54,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:32:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 12:32:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 12:32:54,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:54,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:54,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:54,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:54,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:54,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:54,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:32:54,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:54,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:54,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:54,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:54,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:54,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:54,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 12:32:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:54,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:54,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:54,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:32:54,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:54,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 12:32:54,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:54,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:32:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:32:54,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:54,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 12:32:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:54,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:54,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:54,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:32:54,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:54,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 12:32:54,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:54,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:54,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:32:54,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:54,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:32:54,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 12:32:54,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050387444] [2020-09-25 12:32:54,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:54,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:32:54,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342021563] [2020-09-25 12:32:54,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:32:54,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:54,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:32:54,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:32:54,218 INFO L87 Difference]: Start difference. First operand 260 states and 311 transitions. Second operand 11 states. [2020-09-25 12:32:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:54,445 INFO L93 Difference]: Finished difference Result 281 states and 332 transitions. [2020-09-25 12:32:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 12:32:54,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-09-25 12:32:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:54,447 INFO L225 Difference]: With dead ends: 281 [2020-09-25 12:32:54,447 INFO L226 Difference]: Without dead ends: 232 [2020-09-25 12:32:54,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-09-25 12:32:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-25 12:32:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 221. [2020-09-25 12:32:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-09-25 12:32:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 255 transitions. [2020-09-25 12:32:54,460 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 255 transitions. Word has length 61 [2020-09-25 12:32:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:54,460 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 255 transitions. [2020-09-25 12:32:54,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:32:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 255 transitions. [2020-09-25 12:32:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:32:54,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:54,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:54,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 12:32:54,468 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:54,469 INFO L82 PathProgramCache]: Analyzing trace with hash 320690707, now seen corresponding path program 3 times [2020-09-25 12:32:54,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:54,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393691610] [2020-09-25 12:32:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:54,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:54,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:54,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:54,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:54,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:54,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:54,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:56,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:56,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:32:56,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:32:56,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1893 [2020-09-25 12:32:56,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:56,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:32:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:32:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:32:56,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:56,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:56,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:56,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:56,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:56,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:56,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:32:56,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:56,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:56,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:56,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:56,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:32:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:56,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393691610] [2020-09-25 12:32:56,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:56,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 12:32:56,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483394842] [2020-09-25 12:32:56,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 12:32:56,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:56,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 12:32:56,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:32:56,494 INFO L87 Difference]: Start difference. First operand 221 states and 255 transitions. Second operand 10 states. [2020-09-25 12:32:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:56,819 INFO L93 Difference]: Finished difference Result 303 states and 349 transitions. [2020-09-25 12:32:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 12:32:56,819 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 12:32:56,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:56,821 INFO L225 Difference]: With dead ends: 303 [2020-09-25 12:32:56,822 INFO L226 Difference]: Without dead ends: 290 [2020-09-25 12:32:56,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:32:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-25 12:32:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 232. [2020-09-25 12:32:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-09-25 12:32:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 268 transitions. [2020-09-25 12:32:56,832 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 268 transitions. Word has length 59 [2020-09-25 12:32:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:56,833 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 268 transitions. [2020-09-25 12:32:56,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 12:32:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 268 transitions. [2020-09-25 12:32:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:32:56,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:56,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:56,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 12:32:56,835 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:56,835 INFO L82 PathProgramCache]: Analyzing trace with hash 514623091, now seen corresponding path program 1 times [2020-09-25 12:32:56,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:56,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118306849] [2020-09-25 12:32:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:56,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:56,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:56,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:56,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:56,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:56,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:57,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:59,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:59,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:32:59,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:32:59,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2200 [2020-09-25 12:32:59,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:59,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:59,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:32:59,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:32:59,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:32:59,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:32:59,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:59,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:59,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:59,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:59,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:59,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:32:59,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:59,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:59,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:59,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:59,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:59,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:32:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:32:59,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118306849] [2020-09-25 12:32:59,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:59,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:32:59,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969367847] [2020-09-25 12:32:59,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:32:59,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:32:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:32:59,168 INFO L87 Difference]: Start difference. First operand 232 states and 268 transitions. Second operand 11 states. [2020-09-25 12:32:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:59,427 INFO L93 Difference]: Finished difference Result 314 states and 363 transitions. [2020-09-25 12:32:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:32:59,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 12:32:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:59,429 INFO L225 Difference]: With dead ends: 314 [2020-09-25 12:32:59,430 INFO L226 Difference]: Without dead ends: 304 [2020-09-25 12:32:59,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:32:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-25 12:32:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 266. [2020-09-25 12:32:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-25 12:32:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 309 transitions. [2020-09-25 12:32:59,442 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 309 transitions. Word has length 59 [2020-09-25 12:32:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:59,443 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 309 transitions. [2020-09-25 12:32:59,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:32:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 309 transitions. [2020-09-25 12:32:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:32:59,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:59,444 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:59,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 12:32:59,444 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash -214388301, now seen corresponding path program 2 times [2020-09-25 12:32:59,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:59,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862065415] [2020-09-25 12:32:59,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:59,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:59,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:59,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:59,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:59,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:59,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:59,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:01,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:01,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:33:01,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:01,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1876 [2020-09-25 12:33:01,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:01,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:01,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:33:01,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:01,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:01,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:01,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:01,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:01,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:01,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:01,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:01,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:01,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:01,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:01,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:01,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:01,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:01,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:01,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862065415] [2020-09-25 12:33:01,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:01,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:33:01,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548326527] [2020-09-25 12:33:01,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:33:01,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:33:01,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:33:01,450 INFO L87 Difference]: Start difference. First operand 266 states and 309 transitions. Second operand 11 states. [2020-09-25 12:33:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:01,773 INFO L93 Difference]: Finished difference Result 383 states and 446 transitions. [2020-09-25 12:33:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 12:33:01,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 12:33:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:01,776 INFO L225 Difference]: With dead ends: 383 [2020-09-25 12:33:01,776 INFO L226 Difference]: Without dead ends: 373 [2020-09-25 12:33:01,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2020-09-25 12:33:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-09-25 12:33:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 351. [2020-09-25 12:33:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-09-25 12:33:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 409 transitions. [2020-09-25 12:33:01,793 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 409 transitions. Word has length 59 [2020-09-25 12:33:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:01,793 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 409 transitions. [2020-09-25 12:33:01,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:33:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 409 transitions. [2020-09-25 12:33:01,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:33:01,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:01,795 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:01,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 12:33:01,795 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:01,796 INFO L82 PathProgramCache]: Analyzing trace with hash -20455917, now seen corresponding path program 3 times [2020-09-25 12:33:01,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:01,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788664834] [2020-09-25 12:33:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:01,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:01,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:01,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:01,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:01,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:03,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:03,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:33:03,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:03,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1681 [2020-09-25 12:33:03,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:03,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:33:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:03,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:03,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:03,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:03,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:03,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:03,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:03,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:03,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:03,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:03,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:03,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:03,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:03,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:03,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:33:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:03,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788664834] [2020-09-25 12:33:03,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:03,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 12:33:03,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873087367] [2020-09-25 12:33:03,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 12:33:03,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:03,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 12:33:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:33:03,601 INFO L87 Difference]: Start difference. First operand 351 states and 409 transitions. Second operand 10 states. [2020-09-25 12:33:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:04,002 INFO L93 Difference]: Finished difference Result 456 states and 530 transitions. [2020-09-25 12:33:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 12:33:04,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 12:33:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:04,006 INFO L225 Difference]: With dead ends: 456 [2020-09-25 12:33:04,006 INFO L226 Difference]: Without dead ends: 443 [2020-09-25 12:33:04,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:33:04,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-09-25 12:33:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 405. [2020-09-25 12:33:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-09-25 12:33:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 472 transitions. [2020-09-25 12:33:04,030 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 472 transitions. Word has length 59 [2020-09-25 12:33:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:04,031 INFO L479 AbstractCegarLoop]: Abstraction has 405 states and 472 transitions. [2020-09-25 12:33:04,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 12:33:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 472 transitions. [2020-09-25 12:33:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:33:04,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:04,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:04,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 12:33:04,034 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:04,034 INFO L82 PathProgramCache]: Analyzing trace with hash -193250235, now seen corresponding path program 4 times [2020-09-25 12:33:04,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:04,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11840225] [2020-09-25 12:33:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:04,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:04,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:04,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:04,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:04,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:04,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:04,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:05,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:05,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:33:05,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:05,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1560 [2020-09-25 12:33:05,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:05,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:05,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:33:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:05,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:05,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:05,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:05,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:05,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:05,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:05,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:05,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:05,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:05,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:05,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:05,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:05,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:05,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:33:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:05,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11840225] [2020-09-25 12:33:05,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:05,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 12:33:05,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457889121] [2020-09-25 12:33:05,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 12:33:05,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:05,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 12:33:05,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:33:05,710 INFO L87 Difference]: Start difference. First operand 405 states and 472 transitions. Second operand 10 states. [2020-09-25 12:33:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:05,999 INFO L93 Difference]: Finished difference Result 540 states and 627 transitions. [2020-09-25 12:33:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:33:06,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 12:33:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:06,002 INFO L225 Difference]: With dead ends: 540 [2020-09-25 12:33:06,003 INFO L226 Difference]: Without dead ends: 530 [2020-09-25 12:33:06,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:33:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-09-25 12:33:06,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 426. [2020-09-25 12:33:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-09-25 12:33:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 497 transitions. [2020-09-25 12:33:06,021 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 497 transitions. Word has length 59 [2020-09-25 12:33:06,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:06,021 INFO L479 AbstractCegarLoop]: Abstraction has 426 states and 497 transitions. [2020-09-25 12:33:06,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 12:33:06,022 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 497 transitions. [2020-09-25 12:33:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:33:06,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:06,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:06,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-25 12:33:06,023 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:06,023 INFO L82 PathProgramCache]: Analyzing trace with hash 682149, now seen corresponding path program 3 times [2020-09-25 12:33:06,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:06,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871158549] [2020-09-25 12:33:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:06,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:06,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:06,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:06,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:06,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:06,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:06,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:07,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:07,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:33:07,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:07,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1770 [2020-09-25 12:33:07,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:07,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:07,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:33:07,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:07,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:07,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:07,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:07,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:07,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:07,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:07,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:07,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:07,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:07,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:07,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:07,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:07,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:33:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:07,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871158549] [2020-09-25 12:33:07,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:07,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:33:07,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71785935] [2020-09-25 12:33:07,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:33:07,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:07,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:33:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:33:07,906 INFO L87 Difference]: Start difference. First operand 426 states and 497 transitions. Second operand 11 states. [2020-09-25 12:33:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:08,203 INFO L93 Difference]: Finished difference Result 560 states and 653 transitions. [2020-09-25 12:33:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:33:08,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 12:33:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:08,206 INFO L225 Difference]: With dead ends: 560 [2020-09-25 12:33:08,207 INFO L226 Difference]: Without dead ends: 550 [2020-09-25 12:33:08,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:33:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-09-25 12:33:08,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 522. [2020-09-25 12:33:08,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-25 12:33:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 612 transitions. [2020-09-25 12:33:08,239 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 612 transitions. Word has length 59 [2020-09-25 12:33:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:08,239 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 612 transitions. [2020-09-25 12:33:08,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:33:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 612 transitions. [2020-09-25 12:33:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:33:08,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:08,241 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:08,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-25 12:33:08,242 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:08,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:08,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1565211309, now seen corresponding path program 5 times [2020-09-25 12:33:08,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:08,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511452664] [2020-09-25 12:33:08,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:08,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:08,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:08,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:08,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:08,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:08,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:08,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:09,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:09,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:33:09,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:09,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1638 [2020-09-25 12:33:09,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:09,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:09,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:33:09,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:09,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:09,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:09,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:09,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:09,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:09,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:09,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:09,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:09,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:09,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:09,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:09,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:09,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:09,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:33:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:09,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511452664] [2020-09-25 12:33:09,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:09,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 12:33:09,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887106016] [2020-09-25 12:33:09,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 12:33:09,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:09,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 12:33:09,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:33:09,989 INFO L87 Difference]: Start difference. First operand 522 states and 612 transitions. Second operand 10 states. [2020-09-25 12:33:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:10,251 INFO L93 Difference]: Finished difference Result 600 states and 700 transitions. [2020-09-25 12:33:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:33:10,257 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 12:33:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:10,260 INFO L225 Difference]: With dead ends: 600 [2020-09-25 12:33:10,261 INFO L226 Difference]: Without dead ends: 593 [2020-09-25 12:33:10,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-25 12:33:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-09-25 12:33:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 554. [2020-09-25 12:33:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-09-25 12:33:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 650 transitions. [2020-09-25 12:33:10,283 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 650 transitions. Word has length 59 [2020-09-25 12:33:10,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:10,284 INFO L479 AbstractCegarLoop]: Abstraction has 554 states and 650 transitions. [2020-09-25 12:33:10,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 12:33:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 650 transitions. [2020-09-25 12:33:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:33:10,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:10,285 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:10,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-25 12:33:10,285 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:10,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:10,286 INFO L82 PathProgramCache]: Analyzing trace with hash -335545933, now seen corresponding path program 4 times [2020-09-25 12:33:10,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:10,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542253773] [2020-09-25 12:33:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:10,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:10,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:10,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:10,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:10,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:10,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:10,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:12,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:12,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:33:12,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:12,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1799 [2020-09-25 12:33:12,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:12,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:12,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:33:12,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:12,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:12,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:12,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:12,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:12,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:12,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:12,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:12,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:12,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:12,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:12,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:12,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542253773] [2020-09-25 12:33:12,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:12,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:33:12,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363221863] [2020-09-25 12:33:12,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:33:12,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:33:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:33:12,208 INFO L87 Difference]: Start difference. First operand 554 states and 650 transitions. Second operand 11 states. [2020-09-25 12:33:12,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:12,482 INFO L93 Difference]: Finished difference Result 706 states and 827 transitions. [2020-09-25 12:33:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:33:12,483 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 12:33:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:12,487 INFO L225 Difference]: With dead ends: 706 [2020-09-25 12:33:12,488 INFO L226 Difference]: Without dead ends: 699 [2020-09-25 12:33:12,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-09-25 12:33:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-09-25 12:33:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 639. [2020-09-25 12:33:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2020-09-25 12:33:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 751 transitions. [2020-09-25 12:33:12,524 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 751 transitions. Word has length 59 [2020-09-25 12:33:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:12,524 INFO L479 AbstractCegarLoop]: Abstraction has 639 states and 751 transitions. [2020-09-25 12:33:12,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:33:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 751 transitions. [2020-09-25 12:33:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:33:12,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:12,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:12,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-25 12:33:12,529 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:12,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463589, now seen corresponding path program 5 times [2020-09-25 12:33:12,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:12,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036610093] [2020-09-25 12:33:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:12,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:12,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:12,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:12,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:12,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:12,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:12,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:14,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:14,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:33:14,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:14,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1662 [2020-09-25 12:33:14,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:14,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:14,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:33:14,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:14,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:14,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:14,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:14,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:14,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:14,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:14,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:14,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:14,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:14,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:14,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:14,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:14,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:14,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:33:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:14,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036610093] [2020-09-25 12:33:14,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:14,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:33:14,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602789615] [2020-09-25 12:33:14,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:33:14,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:14,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:33:14,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:33:14,314 INFO L87 Difference]: Start difference. First operand 639 states and 751 transitions. Second operand 11 states. [2020-09-25 12:33:14,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:14,571 INFO L93 Difference]: Finished difference Result 737 states and 865 transitions. [2020-09-25 12:33:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:33:14,572 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 12:33:14,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:14,577 INFO L225 Difference]: With dead ends: 737 [2020-09-25 12:33:14,577 INFO L226 Difference]: Without dead ends: 730 [2020-09-25 12:33:14,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-09-25 12:33:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-09-25 12:33:14,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 705. [2020-09-25 12:33:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2020-09-25 12:33:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 829 transitions. [2020-09-25 12:33:14,630 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 829 transitions. Word has length 59 [2020-09-25 12:33:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:14,631 INFO L479 AbstractCegarLoop]: Abstraction has 705 states and 829 transitions. [2020-09-25 12:33:14,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:33:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 829 transitions. [2020-09-25 12:33:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:33:14,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:14,633 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:14,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-25 12:33:14,633 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:14,634 INFO L82 PathProgramCache]: Analyzing trace with hash -2112571323, now seen corresponding path program 4 times [2020-09-25 12:33:14,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:14,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006398992] [2020-09-25 12:33:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:14,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:14,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:14,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:14,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:14,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:14,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:14,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:16,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:16,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:33:16,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:16,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1809 [2020-09-25 12:33:16,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:16,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:16,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:33:16,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:16,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:16,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:33:16,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:16,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:16,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:16,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:16,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:16,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:16,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:16,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:16,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:16,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:16,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:33:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:16,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006398992] [2020-09-25 12:33:16,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:16,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 12:33:16,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339675214] [2020-09-25 12:33:16,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 12:33:16,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:16,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 12:33:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:33:16,584 INFO L87 Difference]: Start difference. First operand 705 states and 829 transitions. Second operand 10 states. [2020-09-25 12:33:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:16,882 INFO L93 Difference]: Finished difference Result 868 states and 1017 transitions. [2020-09-25 12:33:16,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:33:16,883 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 12:33:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:16,888 INFO L225 Difference]: With dead ends: 868 [2020-09-25 12:33:16,888 INFO L226 Difference]: Without dead ends: 858 [2020-09-25 12:33:16,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:33:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2020-09-25 12:33:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 747. [2020-09-25 12:33:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2020-09-25 12:33:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 878 transitions. [2020-09-25 12:33:16,941 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 878 transitions. Word has length 59 [2020-09-25 12:33:16,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:16,942 INFO L479 AbstractCegarLoop]: Abstraction has 747 states and 878 transitions. [2020-09-25 12:33:16,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 12:33:16,942 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 878 transitions. [2020-09-25 12:33:16,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:33:16,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:16,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:16,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-25 12:33:16,945 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:16,945 INFO L82 PathProgramCache]: Analyzing trace with hash 616502515, now seen corresponding path program 6 times [2020-09-25 12:33:16,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:16,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179183037] [2020-09-25 12:33:16,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:16,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:16,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:17,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:17,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:17,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:17,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:17,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:18,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:18,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:33:18,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:18,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1838 [2020-09-25 12:33:18,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:18,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:33:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:18,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:18,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:18,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:18,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:18,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:18,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:18,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:18,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:18,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:18,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:18,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179183037] [2020-09-25 12:33:18,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:18,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:33:18,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385252480] [2020-09-25 12:33:18,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:33:18,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:18,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:33:18,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:33:18,920 INFO L87 Difference]: Start difference. First operand 747 states and 878 transitions. Second operand 11 states. [2020-09-25 12:33:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:19,313 INFO L93 Difference]: Finished difference Result 895 states and 1051 transitions. [2020-09-25 12:33:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 12:33:19,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 12:33:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:19,318 INFO L225 Difference]: With dead ends: 895 [2020-09-25 12:33:19,318 INFO L226 Difference]: Without dead ends: 885 [2020-09-25 12:33:19,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-09-25 12:33:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2020-09-25 12:33:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 844. [2020-09-25 12:33:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-09-25 12:33:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 993 transitions. [2020-09-25 12:33:19,357 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 993 transitions. Word has length 59 [2020-09-25 12:33:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:19,357 INFO L479 AbstractCegarLoop]: Abstraction has 844 states and 993 transitions. [2020-09-25 12:33:19,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:33:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 993 transitions. [2020-09-25 12:33:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:33:19,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:19,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:19,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-25 12:33:19,359 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:19,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1846167891, now seen corresponding path program 5 times [2020-09-25 12:33:19,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:19,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414550818] [2020-09-25 12:33:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:19,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:19,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:19,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:19,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:19,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:19,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:19,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:20,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:20,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:33:20,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:20,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1515 [2020-09-25 12:33:20,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:20,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:20,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:33:20,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:20,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:20,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:20,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:20,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:20,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:20,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:20,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:20,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:20,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:20,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:20,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:33:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:20,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414550818] [2020-09-25 12:33:20,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:20,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 12:33:20,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51271451] [2020-09-25 12:33:20,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 12:33:20,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:20,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 12:33:20,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:33:20,990 INFO L87 Difference]: Start difference. First operand 844 states and 993 transitions. Second operand 10 states. [2020-09-25 12:33:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:21,270 INFO L93 Difference]: Finished difference Result 960 states and 1125 transitions. [2020-09-25 12:33:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:33:21,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 12:33:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:21,276 INFO L225 Difference]: With dead ends: 960 [2020-09-25 12:33:21,277 INFO L226 Difference]: Without dead ends: 953 [2020-09-25 12:33:21,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-25 12:33:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2020-09-25 12:33:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 876. [2020-09-25 12:33:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2020-09-25 12:33:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1031 transitions. [2020-09-25 12:33:21,310 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1031 transitions. Word has length 59 [2020-09-25 12:33:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:21,310 INFO L479 AbstractCegarLoop]: Abstraction has 876 states and 1031 transitions. [2020-09-25 12:33:21,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 12:33:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1031 transitions. [2020-09-25 12:33:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 12:33:21,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:21,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:21,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-25 12:33:21,312 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:21,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1385223511, now seen corresponding path program 3 times [2020-09-25 12:33:21,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:21,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776732940] [2020-09-25 12:33:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:21,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:21,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:21,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:21,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:21,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:21,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:22,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:22,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 12:33:22,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:22,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1641 [2020-09-25 12:33:22,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:22,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:22,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:33:22,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:33:22,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:22,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:23,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:23,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:23,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:23,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:23,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:23,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:23,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:23,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:23,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776732940] [2020-09-25 12:33:23,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:23,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 12:33:23,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286418221] [2020-09-25 12:33:23,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 12:33:23,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:23,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 12:33:23,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:33:23,064 INFO L87 Difference]: Start difference. First operand 876 states and 1031 transitions. Second operand 10 states. [2020-09-25 12:33:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:23,284 INFO L93 Difference]: Finished difference Result 990 states and 1162 transitions. [2020-09-25 12:33:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:33:23,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-25 12:33:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:23,291 INFO L225 Difference]: With dead ends: 990 [2020-09-25 12:33:23,291 INFO L226 Difference]: Without dead ends: 983 [2020-09-25 12:33:23,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-25 12:33:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-09-25 12:33:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 888. [2020-09-25 12:33:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-09-25 12:33:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1047 transitions. [2020-09-25 12:33:23,323 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1047 transitions. Word has length 60 [2020-09-25 12:33:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:23,323 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1047 transitions. [2020-09-25 12:33:23,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 12:33:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1047 transitions. [2020-09-25 12:33:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 12:33:23,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:23,325 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:23,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-25 12:33:23,325 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash 656212119, now seen corresponding path program 4 times [2020-09-25 12:33:23,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:23,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719203092] [2020-09-25 12:33:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:23,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:23,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:23,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:23,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:23,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:23,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:23,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:24,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:24,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 12:33:24,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:24,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1652 [2020-09-25 12:33:24,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:24,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:33:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:33:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:24,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:33:25,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:25,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:25,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:25,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:25,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:25,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:25,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:25,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:25,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:25,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:25,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:25,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:33:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:25,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719203092] [2020-09-25 12:33:25,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:25,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 12:33:25,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48181762] [2020-09-25 12:33:25,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 12:33:25,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 12:33:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:33:25,088 INFO L87 Difference]: Start difference. First operand 888 states and 1047 transitions. Second operand 10 states. [2020-09-25 12:33:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:25,345 INFO L93 Difference]: Finished difference Result 994 states and 1168 transitions. [2020-09-25 12:33:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:33:25,345 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-25 12:33:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:25,349 INFO L225 Difference]: With dead ends: 994 [2020-09-25 12:33:25,349 INFO L226 Difference]: Without dead ends: 987 [2020-09-25 12:33:25,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:33:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-09-25 12:33:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 921. [2020-09-25 12:33:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 921 states. [2020-09-25 12:33:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1087 transitions. [2020-09-25 12:33:25,379 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1087 transitions. Word has length 60 [2020-09-25 12:33:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:25,379 INFO L479 AbstractCegarLoop]: Abstraction has 921 states and 1087 transitions. [2020-09-25 12:33:25,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 12:33:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1087 transitions. [2020-09-25 12:33:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 12:33:25,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:25,381 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:25,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-25 12:33:25,381 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:25,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:25,382 INFO L82 PathProgramCache]: Analyzing trace with hash 104942935, now seen corresponding path program 5 times [2020-09-25 12:33:25,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:25,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898606057] [2020-09-25 12:33:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:25,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:25,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:25,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:25,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:25,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:25,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:25,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:26,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:26,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 12:33:26,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:33:26,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1570 [2020-09-25 12:33:26,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:26,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:33:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:33:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 12:33:26,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:27,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:27,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:27,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:27,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:27,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:27,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:27,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:27,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:27,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:27,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898606057] [2020-09-25 12:33:27,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:27,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 12:33:27,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005934126] [2020-09-25 12:33:27,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 12:33:27,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:27,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 12:33:27,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:33:27,066 INFO L87 Difference]: Start difference. First operand 921 states and 1087 transitions. Second operand 10 states. [2020-09-25 12:33:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:33:27,473 INFO L93 Difference]: Finished difference Result 1051 states and 1237 transitions. [2020-09-25 12:33:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 12:33:27,474 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-25 12:33:27,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:33:27,478 INFO L225 Difference]: With dead ends: 1051 [2020-09-25 12:33:27,478 INFO L226 Difference]: Without dead ends: 1041 [2020-09-25 12:33:27,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-09-25 12:33:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2020-09-25 12:33:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 932. [2020-09-25 12:33:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2020-09-25 12:33:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1100 transitions. [2020-09-25 12:33:27,512 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1100 transitions. Word has length 60 [2020-09-25 12:33:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:33:27,512 INFO L479 AbstractCegarLoop]: Abstraction has 932 states and 1100 transitions. [2020-09-25 12:33:27,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 12:33:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1100 transitions. [2020-09-25 12:33:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 12:33:27,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:33:27,514 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:33:27,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-25 12:33:27,515 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:33:27,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:33:27,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1542070112, now seen corresponding path program 6 times [2020-09-25 12:33:27,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:33:27,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115370684] [2020-09-25 12:33:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:33:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:27,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:27,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:27,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:27,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:27,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:27,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:27,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:27,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:27,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:28,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:28,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:28,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:28,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:30,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:30,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-25 12:33:30,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 12:33:30,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2627 [2020-09-25 12:33:30,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:30,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:30,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:33:30,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:33:30,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 12:33:30,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:30,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:33:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:33:30,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:33:30,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:33:30,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:33:30,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:33:30,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:33:30,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:33:30,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:33:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:33:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:33:30,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:33:30,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:33:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:33:30,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115370684] [2020-09-25 12:33:30,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:33:30,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:33:30,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546735510] [2020-09-25 12:33:30,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:33:30,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:33:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:33:30,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:33:30,261 INFO L87 Difference]: Start difference. First operand 932 states and 1100 transitions. Second operand 11 states.