/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=0.1 --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-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:16:56,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:16:57,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:16:57,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:16:57,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:16:57,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:16:57,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:16:57,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:16:57,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:16:57,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:16:57,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:16:57,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:16:57,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:16:57,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:16:57,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:16:57,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:16:57,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:16:57,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:16:57,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:16:57,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:16:57,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:16:57,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:16:57,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:16:57,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:16:57,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:16:57,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:16:57,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:16:57,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:16:57,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:16:57,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:16:57,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:16:57,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:16:57,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:16:57,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:16:57,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:16:57,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:16:57,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:16:57,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:16:57,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:16:57,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:16:57,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:16:57,074 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 10:16:57,100 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:16:57,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:16:57,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:16:57,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:16:57,102 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:16:57,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:16:57,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:16:57,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:16:57,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:16:57,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:16:57,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:16:57,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:16:57,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:16:57,104 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:16:57,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:16:57,104 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:16:57,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:16:57,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:16:57,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:16:57,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:16:57,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:16:57,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:16:57,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:16:57,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:16:57,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:16:57,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:16:57,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:16:57,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:16:57,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:16:57,107 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=0.1;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=0.1;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=0.1;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=0.1;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=0.1;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=0.1;log-additional-information=true; [2020-09-25 10:16:57,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:16:57,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:16:57,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:16:57,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:16:57,592 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:16:57,593 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-25 10:16:57,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb563b11b/5f23d603328c4dae8a302bfe45aaa401/FLAGaa33ff8b5 [2020-09-25 10:16:58,194 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:16:58,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-25 10:16:58,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb563b11b/5f23d603328c4dae8a302bfe45aaa401/FLAGaa33ff8b5 [2020-09-25 10:16:58,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb563b11b/5f23d603328c4dae8a302bfe45aaa401 [2020-09-25 10:16:58,560 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:16:58,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:16:58,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:16:58,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:16:58,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:16:58,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:16:58" (1/1) ... [2020-09-25 10:16:58,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47a8d835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58, skipping insertion in model container [2020-09-25 10:16:58,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:16:58" (1/1) ... [2020-09-25 10:16:58,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:16:58,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:16:58,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:16:58,913 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:16:58,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:16:58,953 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:16:58,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58 WrapperNode [2020-09-25 10:16:58,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:16:58,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:16:58,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:16:58,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:16:59,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58" (1/1) ... [2020-09-25 10:16:59,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58" (1/1) ... [2020-09-25 10:16:59,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58" (1/1) ... [2020-09-25 10:16:59,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58" (1/1) ... [2020-09-25 10:16:59,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58" (1/1) ... [2020-09-25 10:16:59,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58" (1/1) ... [2020-09-25 10:16:59,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58" (1/1) ... [2020-09-25 10:16:59,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:16:59,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:16:59,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:16:59,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:16:59,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58" (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 10:16:59,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:16:59,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:16:59,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 10:16:59,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:16:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:16:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:16:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 10:16:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:16:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 10:16:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 10:16:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 10:16:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 10:16:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:16:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:16:59,425 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:16:59,425 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 10:16:59,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:16:59 BoogieIcfgContainer [2020-09-25 10:16:59,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:16:59,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:16:59,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:16:59,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:16:59,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:16:58" (1/3) ... [2020-09-25 10:16:59,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bceee61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:16:59, skipping insertion in model container [2020-09-25 10:16:59,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:58" (2/3) ... [2020-09-25 10:16:59,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bceee61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:16:59, skipping insertion in model container [2020-09-25 10:16:59,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:16:59" (3/3) ... [2020-09-25 10:16:59,447 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-09-25 10:16:59,461 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:16:59,471 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:16:59,499 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:16:59,527 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:16:59,527 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:16:59,527 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:16:59,527 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:16:59,527 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:16:59,527 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:16:59,527 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:16:59,528 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:16:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-09-25 10:16:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 10:16:59,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:59,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:59,556 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:59,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-09-25 10:16:59,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:59,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325663270] [2020-09-25 10:16:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:59,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:59,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:59,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:59,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:59,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 10:16:59,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:16:59,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-09-25 10:16:59,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:59,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:59,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:16:59,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 10:16:59,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 10:16:59,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 10:17:00,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:00,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:00,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:00,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:00,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:00,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 10:17:00,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:00,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:00,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:00,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:00,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:00,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:00,110 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 10:17:00,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325663270] [2020-09-25 10:17:00,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:17:00,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 10:17:00,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539843614] [2020-09-25 10:17:00,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 10:17:00,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:00,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 10:17:00,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:17:00,143 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-09-25 10:17:00,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:00,452 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2020-09-25 10:17:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 10:17:00,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-25 10:17:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:00,466 INFO L225 Difference]: With dead ends: 83 [2020-09-25 10:17:00,466 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 10:17:00,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-25 10:17:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 10:17:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-09-25 10:17:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 10:17:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-25 10:17:00,524 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 17 [2020-09-25 10:17:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:00,524 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-25 10:17:00,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 10:17:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-25 10:17:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 10:17:00,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:00,527 INFO L422 BasicCegarLoop]: trace histogram [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 10:17:00,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:17:00,527 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:00,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1756759471, now seen corresponding path program 1 times [2020-09-25 10:17:00,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:00,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258069609] [2020-09-25 10:17:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:00,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:00,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:00,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:01,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:01,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 10:17:01,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:17:01,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-09-25 10:17:01,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:01,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:17:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 10:17:01,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:01,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:01,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:01,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:01,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:01,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:01,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 10:17:01,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:01,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:01,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:01,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:01,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:01,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:01,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258069609] [2020-09-25 10:17:01,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:01,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 10:17:01,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730764303] [2020-09-25 10:17:01,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 10:17:01,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 10:17:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 10:17:01,337 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2020-09-25 10:17:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:01,541 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-09-25 10:17:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 10:17:01,541 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 10:17:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:01,543 INFO L225 Difference]: With dead ends: 59 [2020-09-25 10:17:01,543 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 10:17:01,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 10:17:01,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 10:17:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-09-25 10:17:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-25 10:17:01,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-09-25 10:17:01,553 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 33 [2020-09-25 10:17:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:01,553 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-09-25 10:17:01,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 10:17:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-09-25 10:17:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 10:17:01,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:01,555 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:17:01,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:17:01,556 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash 737263125, now seen corresponding path program 2 times [2020-09-25 10:17:01,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:01,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690341787] [2020-09-25 10:17:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:01,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:01,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:01,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:01,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:02,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:02,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 10:17:02,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:02,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-09-25 10:17:02,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:02,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:02,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:17:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 10:17:02,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:02,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:02,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:02,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:02,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:02,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 10:17:02,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:02,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:02,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690341787] [2020-09-25 10:17:02,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:02,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 10:17:02,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018480205] [2020-09-25 10:17:02,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 10:17:02,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:02,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 10:17:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:17:02,850 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 10 states. [2020-09-25 10:17:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:03,080 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-09-25 10:17:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 10:17:03,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-25 10:17:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:03,082 INFO L225 Difference]: With dead ends: 66 [2020-09-25 10:17:03,082 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 10:17:03,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-09-25 10:17:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 10:17:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-09-25 10:17:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 10:17:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-09-25 10:17:03,091 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2020-09-25 10:17:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:03,091 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-09-25 10:17:03,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 10:17:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-09-25 10:17:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 10:17:03,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:03,093 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:17:03,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:17:03,094 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:03,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1672550673, now seen corresponding path program 3 times [2020-09-25 10:17:03,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:03,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058590707] [2020-09-25 10:17:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:03,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:03,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:03,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:04,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:04,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 10:17:04,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:04,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1288 [2020-09-25 10:17:04,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:04,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:04,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:17:04,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:04,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 10:17:04,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 10:17:04,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:04,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:04,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:04,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:04,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:04,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:17:04,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:04,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:04,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:04,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:04,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:04,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:04,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058590707] [2020-09-25 10:17:04,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:04,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 10:17:04,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727674763] [2020-09-25 10:17:04,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 10:17:04,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:04,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 10:17:04,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-25 10:17:04,550 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 12 states. [2020-09-25 10:17:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:04,827 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-09-25 10:17:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 10:17:04,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-09-25 10:17:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:04,829 INFO L225 Difference]: With dead ends: 73 [2020-09-25 10:17:04,829 INFO L226 Difference]: Without dead ends: 64 [2020-09-25 10:17:04,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:17:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-25 10:17:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-09-25 10:17:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 10:17:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-25 10:17:04,837 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2020-09-25 10:17:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:04,838 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-25 10:17:04,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 10:17:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-25 10:17:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-25 10:17:04,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:04,840 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:17:04,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:17:04,840 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash 504689877, now seen corresponding path program 4 times [2020-09-25 10:17:04,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:04,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228018613] [2020-09-25 10:17:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:04,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:04,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:04,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:05,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:05,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:05,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-25 10:17:05,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:05,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-09-25 10:17:05,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:05,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:05,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 10:17:05,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:05,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 10:17:05,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:06,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:06,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:06,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:06,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:06,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:06,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 10:17:06,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:06,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:06,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:06,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:06,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:06,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:06,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228018613] [2020-09-25 10:17:06,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:06,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 10:17:06,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747729456] [2020-09-25 10:17:06,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 10:17:06,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 10:17:06,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-25 10:17:06,207 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 14 states. [2020-09-25 10:17:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:06,610 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2020-09-25 10:17:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 10:17:06,611 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-09-25 10:17:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:06,612 INFO L225 Difference]: With dead ends: 75 [2020-09-25 10:17:06,612 INFO L226 Difference]: Without dead ends: 69 [2020-09-25 10:17:06,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-09-25 10:17:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-25 10:17:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-09-25 10:17:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 10:17:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-25 10:17:06,623 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 54 [2020-09-25 10:17:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:06,623 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-25 10:17:06,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 10:17:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-25 10:17:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 10:17:06,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:06,625 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 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 10:17:06,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:17:06,625 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:06,626 INFO L82 PathProgramCache]: Analyzing trace with hash -182151121, now seen corresponding path program 5 times [2020-09-25 10:17:06,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:06,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033060549] [2020-09-25 10:17:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:06,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:06,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:06,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:06,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:07,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:07,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 10:17:07,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:07,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1306 [2020-09-25 10:17:07,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:07,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:07,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 10:17:07,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:07,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 10:17:07,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:17:08,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:08,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:08,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:08,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:08,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:08,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:17:08,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:08,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:08,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:17:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:08,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033060549] [2020-09-25 10:17:08,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:08,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 10:17:08,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430093720] [2020-09-25 10:17:08,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 10:17:08,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:08,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 10:17:08,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-25 10:17:08,123 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 16 states. [2020-09-25 10:17:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:08,460 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-09-25 10:17:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 10:17:08,461 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-09-25 10:17:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:08,462 INFO L225 Difference]: With dead ends: 87 [2020-09-25 10:17:08,462 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 10:17:08,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-09-25 10:17:08,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 10:17:08,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-09-25 10:17:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 10:17:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-25 10:17:08,475 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2020-09-25 10:17:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:08,476 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-25 10:17:08,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 10:17:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-25 10:17:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 10:17:08,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:08,480 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 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 10:17:08,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 10:17:08,481 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:08,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1007592555, now seen corresponding path program 6 times [2020-09-25 10:17:08,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:08,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101094943] [2020-09-25 10:17:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:08,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:08,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:08,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:08,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:10,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:10,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 10:17:10,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:10,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1681 [2020-09-25 10:17:10,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:10,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:10,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 10:17:10,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:10,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 10:17:10,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:10,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:10,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:10,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:10,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:10,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:10,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:17:10,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:10,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:10,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:10,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101094943] [2020-09-25 10:17:10,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:10,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 10:17:10,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095550634] [2020-09-25 10:17:10,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 10:17:10,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:10,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 10:17:10,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-09-25 10:17:10,373 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 18 states. [2020-09-25 10:17:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:10,760 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-09-25 10:17:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 10:17:10,761 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-09-25 10:17:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:10,762 INFO L225 Difference]: With dead ends: 94 [2020-09-25 10:17:10,762 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 10:17:10,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2020-09-25 10:17:10,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 10:17:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-09-25 10:17:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 10:17:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-25 10:17:10,770 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-25 10:17:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:10,770 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-25 10:17:10,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 10:17:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-25 10:17:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 10:17:10,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:10,772 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 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 10:17:10,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 10:17:10,772 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:10,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:10,773 INFO L82 PathProgramCache]: Analyzing trace with hash -527754897, now seen corresponding path program 7 times [2020-09-25 10:17:10,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:10,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080340468] [2020-09-25 10:17:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:10,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:10,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:10,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:11,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:12,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:12,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 10:17:12,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:12,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1614 [2020-09-25 10:17:12,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:12,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:12,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 10:17:12,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 10:17:12,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:12,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:12,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:12,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:12,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:12,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:12,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 10:17:12,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:12,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:12,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:12,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080340468] [2020-09-25 10:17:12,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:12,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 10:17:12,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406077911] [2020-09-25 10:17:12,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 10:17:12,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 10:17:12,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:17:12,673 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 20 states. [2020-09-25 10:17:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:13,167 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-09-25 10:17:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 10:17:13,168 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-09-25 10:17:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:13,169 INFO L225 Difference]: With dead ends: 96 [2020-09-25 10:17:13,169 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 10:17:13,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 10:17:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 10:17:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-25 10:17:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 10:17:13,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-09-25 10:17:13,188 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 75 [2020-09-25 10:17:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:13,189 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-09-25 10:17:13,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 10:17:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-09-25 10:17:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-25 10:17:13,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:13,190 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 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 10:17:13,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 10:17:13,191 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:13,191 INFO L82 PathProgramCache]: Analyzing trace with hash -911019435, now seen corresponding path program 8 times [2020-09-25 10:17:13,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:13,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041338037] [2020-09-25 10:17:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:13,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:13,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:13,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:13,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:14,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:14,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-25 10:17:14,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:14,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1786 [2020-09-25 10:17:14,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:14,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:14,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 10:17:14,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:14,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 10:17:14,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:15,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:15,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:15,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:15,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:15,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:15,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:17:15,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:15,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:15,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:15,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041338037] [2020-09-25 10:17:15,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:15,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 10:17:15,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780069516] [2020-09-25 10:17:15,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 10:17:15,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:15,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 10:17:15,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-09-25 10:17:15,282 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 22 states. [2020-09-25 10:17:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:15,883 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-09-25 10:17:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 10:17:15,883 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-09-25 10:17:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:15,884 INFO L225 Difference]: With dead ends: 108 [2020-09-25 10:17:15,885 INFO L226 Difference]: Without dead ends: 99 [2020-09-25 10:17:15,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 10:17:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-25 10:17:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-09-25 10:17:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-25 10:17:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-09-25 10:17:15,904 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 82 [2020-09-25 10:17:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:15,905 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-09-25 10:17:15,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 10:17:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-09-25 10:17:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 10:17:15,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:15,911 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 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 10:17:15,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 10:17:15,911 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:15,912 INFO L82 PathProgramCache]: Analyzing trace with hash -388601169, now seen corresponding path program 9 times [2020-09-25 10:17:15,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:15,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130924179] [2020-09-25 10:17:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:15,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:15,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:16,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:16,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:18,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:18,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-25 10:17:18,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:18,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2426 [2020-09-25 10:17:18,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:18,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 10:17:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 10:17:18,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:18,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:18,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:18,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:18,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:18,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:18,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:17:18,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:18,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:18,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:18,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:18,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:18,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:18,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130924179] [2020-09-25 10:17:18,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:18,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 10:17:18,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024472803] [2020-09-25 10:17:18,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 10:17:18,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:18,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 10:17:18,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-09-25 10:17:18,623 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 24 states. [2020-09-25 10:17:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:19,163 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2020-09-25 10:17:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 10:17:19,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-09-25 10:17:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:19,171 INFO L225 Difference]: With dead ends: 115 [2020-09-25 10:17:19,171 INFO L226 Difference]: Without dead ends: 106 [2020-09-25 10:17:19,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=514, Invalid=1378, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 10:17:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-25 10:17:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2020-09-25 10:17:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-25 10:17:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-09-25 10:17:19,183 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 89 [2020-09-25 10:17:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:19,183 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-09-25 10:17:19,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 10:17:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-09-25 10:17:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-25 10:17:19,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:19,189 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 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 10:17:19,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 10:17:19,189 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:19,189 INFO L82 PathProgramCache]: Analyzing trace with hash 512080149, now seen corresponding path program 10 times [2020-09-25 10:17:19,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:19,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680242427] [2020-09-25 10:17:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:19,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:19,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:19,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:19,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:21,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:21,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-25 10:17:21,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:21,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2611 [2020-09-25 10:17:21,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:21,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 10:17:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 10:17:21,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:22,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:22,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:22,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:22,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:22,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:22,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:17:22,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:22,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:22,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:22,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680242427] [2020-09-25 10:17:22,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:22,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 10:17:22,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020709260] [2020-09-25 10:17:22,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 10:17:22,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:22,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 10:17:22,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2020-09-25 10:17:22,123 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 26 states. [2020-09-25 10:17:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:22,849 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2020-09-25 10:17:22,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 10:17:22,850 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-09-25 10:17:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:22,851 INFO L225 Difference]: With dead ends: 122 [2020-09-25 10:17:22,851 INFO L226 Difference]: Without dead ends: 113 [2020-09-25 10:17:22,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=619, Invalid=1637, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 10:17:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-25 10:17:22,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2020-09-25 10:17:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-25 10:17:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-09-25 10:17:22,858 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 96 [2020-09-25 10:17:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:22,858 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-09-25 10:17:22,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 10:17:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-09-25 10:17:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-25 10:17:22,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:22,859 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 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 10:17:22,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 10:17:22,860 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:22,860 INFO L82 PathProgramCache]: Analyzing trace with hash -178615313, now seen corresponding path program 11 times [2020-09-25 10:17:22,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:22,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227196755] [2020-09-25 10:17:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:23,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:23,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:25,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:25,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-25 10:17:25,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:25,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2622 [2020-09-25 10:17:25,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:25,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:25,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 10:17:25,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:25,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-25 10:17:25,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:25,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:25,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:25,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:25,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:25,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:25,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 10:17:25,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:25,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:25,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:25,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:25,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227196755] [2020-09-25 10:17:25,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:25,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-25 10:17:25,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825018648] [2020-09-25 10:17:25,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-25 10:17:25,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-25 10:17:25,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2020-09-25 10:17:25,972 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 28 states. [2020-09-25 10:17:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:26,673 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-09-25 10:17:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 10:17:26,673 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 103 [2020-09-25 10:17:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:26,674 INFO L225 Difference]: With dead ends: 129 [2020-09-25 10:17:26,675 INFO L226 Difference]: Without dead ends: 120 [2020-09-25 10:17:26,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=734, Invalid=1918, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 10:17:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-25 10:17:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2020-09-25 10:17:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 10:17:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-09-25 10:17:26,682 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 103 [2020-09-25 10:17:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:26,682 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-09-25 10:17:26,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-25 10:17:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-09-25 10:17:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-25 10:17:26,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:26,684 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 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 10:17:26,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 10:17:26,684 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1265258539, now seen corresponding path program 12 times [2020-09-25 10:17:26,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:26,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241066810] [2020-09-25 10:17:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:26,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:26,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:26,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:27,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:29,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:29,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-25 10:17:29,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:29,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3015 [2020-09-25 10:17:29,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:29,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 10:17:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-25 10:17:29,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:30,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:30,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:30,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:30,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:30,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:30,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:17:30,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:30,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:30,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:30,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:30,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:30,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:30,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241066810] [2020-09-25 10:17:30,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:30,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 10:17:30,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038634450] [2020-09-25 10:17:30,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 10:17:30,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:30,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 10:17:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2020-09-25 10:17:30,141 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 30 states. [2020-09-25 10:17:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:31,133 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2020-09-25 10:17:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-25 10:17:31,134 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2020-09-25 10:17:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:31,135 INFO L225 Difference]: With dead ends: 136 [2020-09-25 10:17:31,135 INFO L226 Difference]: Without dead ends: 127 [2020-09-25 10:17:31,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=859, Invalid=2221, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 10:17:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-25 10:17:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2020-09-25 10:17:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-25 10:17:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-09-25 10:17:31,141 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 110 [2020-09-25 10:17:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:31,142 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-09-25 10:17:31,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 10:17:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-09-25 10:17:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-25 10:17:31,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:31,144 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 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 10:17:31,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 10:17:31,144 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:31,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1972667089, now seen corresponding path program 13 times [2020-09-25 10:17:31,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:31,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081357881] [2020-09-25 10:17:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:31,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:31,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:31,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:32,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:33,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:33,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-25 10:17:33,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:33,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2751 [2020-09-25 10:17:33,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:33,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:33,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-25 10:17:33,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:33,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-25 10:17:33,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:34,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:34,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:34,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:34,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:34,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:34,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:17:34,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:34,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:34,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:34,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:34,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:34,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:34,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081357881] [2020-09-25 10:17:34,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:34,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-25 10:17:34,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859193906] [2020-09-25 10:17:34,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-25 10:17:34,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:34,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-25 10:17:34,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2020-09-25 10:17:34,438 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 32 states. [2020-09-25 10:17:35,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:35,382 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2020-09-25 10:17:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-25 10:17:35,383 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 117 [2020-09-25 10:17:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:35,384 INFO L225 Difference]: With dead ends: 143 [2020-09-25 10:17:35,385 INFO L226 Difference]: Without dead ends: 134 [2020-09-25 10:17:35,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=994, Invalid=2546, Unknown=0, NotChecked=0, Total=3540 [2020-09-25 10:17:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-25 10:17:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2020-09-25 10:17:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 10:17:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-09-25 10:17:35,392 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 117 [2020-09-25 10:17:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:35,392 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-09-25 10:17:35,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-25 10:17:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-09-25 10:17:35,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-25 10:17:35,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:35,394 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 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 10:17:35,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 10:17:35,394 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:35,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1091491477, now seen corresponding path program 14 times [2020-09-25 10:17:35,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:35,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201897215] [2020-09-25 10:17:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:35,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:35,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:36,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:36,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:38,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:38,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-09-25 10:17:38,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:38,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2909 [2020-09-25 10:17:38,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:38,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:38,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 10:17:38,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:38,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-09-25 10:17:38,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:38,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:38,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:38,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:38,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:38,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:38,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:17:38,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:38,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:38,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:38,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:38,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:38,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:38,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201897215] [2020-09-25 10:17:38,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:38,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-25 10:17:38,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366559751] [2020-09-25 10:17:38,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-25 10:17:38,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:38,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-25 10:17:38,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 10:17:38,927 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 34 states. [2020-09-25 10:17:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:40,122 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2020-09-25 10:17:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-25 10:17:40,123 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 124 [2020-09-25 10:17:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:40,125 INFO L225 Difference]: With dead ends: 150 [2020-09-25 10:17:40,125 INFO L226 Difference]: Without dead ends: 141 [2020-09-25 10:17:40,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1139, Invalid=2893, Unknown=0, NotChecked=0, Total=4032 [2020-09-25 10:17:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-25 10:17:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2020-09-25 10:17:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-25 10:17:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-09-25 10:17:40,132 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 124 [2020-09-25 10:17:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:40,133 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-09-25 10:17:40,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-25 10:17:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-09-25 10:17:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-25 10:17:40,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:40,135 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 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 10:17:40,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 10:17:40,135 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:40,135 INFO L82 PathProgramCache]: Analyzing trace with hash 157105775, now seen corresponding path program 15 times [2020-09-25 10:17:40,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:40,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801938714] [2020-09-25 10:17:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:40,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:40,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:40,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:41,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:43,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:43,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-25 10:17:43,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:43,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3236 [2020-09-25 10:17:43,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:43,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:43,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 10:17:43,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:43,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-25 10:17:43,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:44,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:44,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:44,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:44,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:44,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:44,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:17:44,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:44,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:44,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:44,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801938714] [2020-09-25 10:17:44,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:44,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-25 10:17:44,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285366396] [2020-09-25 10:17:44,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-25 10:17:44,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:44,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-25 10:17:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=966, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 10:17:44,048 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 36 states. [2020-09-25 10:17:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:45,273 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2020-09-25 10:17:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-25 10:17:45,273 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 131 [2020-09-25 10:17:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:45,275 INFO L225 Difference]: With dead ends: 157 [2020-09-25 10:17:45,275 INFO L226 Difference]: Without dead ends: 148 [2020-09-25 10:17:45,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1294, Invalid=3262, Unknown=0, NotChecked=0, Total=4556 [2020-09-25 10:17:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-25 10:17:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2020-09-25 10:17:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-25 10:17:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-09-25 10:17:45,286 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 131 [2020-09-25 10:17:45,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:45,288 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-09-25 10:17:45,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-25 10:17:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-09-25 10:17:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-25 10:17:45,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:45,290 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 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 10:17:45,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 10:17:45,290 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:45,291 INFO L82 PathProgramCache]: Analyzing trace with hash -65196715, now seen corresponding path program 16 times [2020-09-25 10:17:45,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:45,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789439162] [2020-09-25 10:17:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:45,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:45,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:46,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:46,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:49,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:49,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-09-25 10:17:49,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:17:49,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3709 [2020-09-25 10:17:49,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:49,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:49,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-25 10:17:49,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 10:17:49,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-25 10:17:49,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:49,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:49,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:49,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:49,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:49,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:49,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 10:17:49,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:49,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:49,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:49,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:49,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:49,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:17:49,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789439162] [2020-09-25 10:17:49,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:49,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-25 10:17:49,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110083930] [2020-09-25 10:17:49,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-25 10:17:49,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:49,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-25 10:17:49,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2020-09-25 10:17:49,748 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 38 states.