/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=SHALLOWEST --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 00:04:21,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:04:21,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:04:21,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:04:21,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:04:21,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:04:21,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:04:21,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:04:21,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:04:21,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:04:21,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:04:21,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:04:21,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:04:21,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:04:21,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:04:21,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:04:21,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:04:21,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:04:21,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:04:21,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:04:21,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:04:21,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:04:21,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:04:21,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:04:21,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:04:21,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:04:21,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:04:21,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:04:21,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:04:21,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:04:21,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:04:21,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:04:21,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:04:21,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:04:21,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:04:21,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:04:21,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:04:21,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:04:21,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:04:21,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:04:21,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:04:21,317 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 00:04:21,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:04:21,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:04:21,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:04:21,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:04:21,369 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:04:21,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:04:21,369 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:04:21,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:04:21,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:04:21,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:04:21,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:04:21,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:04:21,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:04:21,371 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:04:21,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:04:21,371 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:04:21,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:04:21,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:04:21,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:04:21,372 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:04:21,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:04:21,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:04:21,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:04:21,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:04:21,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:04:21,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:04:21,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:04:21,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:04:21,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:04:21,374 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:04:21,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:04:21,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:04:21,869 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:04:21,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:04:21,872 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:04:21,873 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-25 00:04:21,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/078f05e36/a33fbf6a5f1b4c6fa19aac6b8128b6fd/FLAG31c153ba3 [2020-09-25 00:04:22,466 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:04:22,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-25 00:04:22,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/078f05e36/a33fbf6a5f1b4c6fa19aac6b8128b6fd/FLAG31c153ba3 [2020-09-25 00:04:22,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/078f05e36/a33fbf6a5f1b4c6fa19aac6b8128b6fd [2020-09-25 00:04:22,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:04:22,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:04:22,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:22,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:04:22,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:04:22,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a73c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:22, skipping insertion in model container [2020-09-25 00:04:22,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:22" (1/1) ... [2020-09-25 00:04:22,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:04:22,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:04:23,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:23,190 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:04:23,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:23,231 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:04:23,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:23 WrapperNode [2020-09-25 00:04:23,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:23,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:04:23,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:04:23,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:04:23,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:23" (1/1) ... [2020-09-25 00:04:23,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:23" (1/1) ... [2020-09-25 00:04:23,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:23" (1/1) ... [2020-09-25 00:04:23,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:23" (1/1) ... [2020-09-25 00:04:23,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:23" (1/1) ... [2020-09-25 00:04:23,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:23" (1/1) ... [2020-09-25 00:04:23,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:23" (1/1) ... [2020-09-25 00:04:23,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:04:23,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:04:23,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:04:23,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:04:23,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:23" (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 00:04:23,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:04:23,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:04:23,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:04:23,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:04:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:04:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:04:23,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:04:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:04:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 00:04:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 00:04:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 00:04:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 00:04:23,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:04:23,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:04:23,747 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:04:23,748 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 00:04:23,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:23 BoogieIcfgContainer [2020-09-25 00:04:23,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:04:23,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:04:23,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:04:23,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:04:23,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:04:22" (1/3) ... [2020-09-25 00:04:23,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69eb788a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:23, skipping insertion in model container [2020-09-25 00:04:23,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:23" (2/3) ... [2020-09-25 00:04:23,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69eb788a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:23, skipping insertion in model container [2020-09-25 00:04:23,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:23" (3/3) ... [2020-09-25 00:04:23,763 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-09-25 00:04:23,776 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:04:23,786 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:04:23,807 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:04:23,835 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:04:23,835 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:04:23,835 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:04:23,835 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:04:23,835 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:04:23,835 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:04:23,835 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:04:23,835 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:04:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-09-25 00:04:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 00:04:23,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:23,865 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 00:04:23,865 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-09-25 00:04:23,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:23,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210595277] [2020-09-25 00:04:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:24,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:24,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 00:04:24,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:04:24,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-09-25 00:04:24,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:24,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:24,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 00:04:24,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:24,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:04:24,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:24,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:24,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:24,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:24,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 00:04:24,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:24,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:24,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:24,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:24,397 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 00:04:24,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210595277] [2020-09-25 00:04:24,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:24,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:04:24,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50864573] [2020-09-25 00:04:24,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:04:24,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:24,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:04:24,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:04:24,432 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-09-25 00:04:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:24,586 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-09-25 00:04:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:04:24,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-25 00:04:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:24,600 INFO L225 Difference]: With dead ends: 61 [2020-09-25 00:04:24,600 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 00:04:24,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:04:24,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 00:04:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-25 00:04:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-25 00:04:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-09-25 00:04:24,655 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-09-25 00:04:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:24,656 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-09-25 00:04:24,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:04:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-09-25 00:04:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-25 00:04:24,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:24,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:24,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:04:24,658 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2141881988, now seen corresponding path program 1 times [2020-09-25 00:04:24,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:24,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358597650] [2020-09-25 00:04:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:24,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:24,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 00:04:24,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:24,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-09-25 00:04:24,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:04:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 00:04:24,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:24,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:24,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:24,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:24,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:24,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:24,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 00:04:24,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:24,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:24,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:24,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:24,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:24,993 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 00:04:24,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358597650] [2020-09-25 00:04:24,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:24,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:04:24,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810522668] [2020-09-25 00:04:24,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:04:24,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:24,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:04:24,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:04:24,999 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-09-25 00:04:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:25,092 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-09-25 00:04:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 00:04:25,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-09-25 00:04:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:25,096 INFO L225 Difference]: With dead ends: 59 [2020-09-25 00:04:25,096 INFO L226 Difference]: Without dead ends: 45 [2020-09-25 00:04:25,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:04:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-25 00:04:25,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-09-25 00:04:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 00:04:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-25 00:04:25,108 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 19 [2020-09-25 00:04:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:25,108 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-25 00:04:25,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:04:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-25 00:04:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 00:04:25,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:25,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:25,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:04:25,111 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:25,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1000622251, now seen corresponding path program 1 times [2020-09-25 00:04:25,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:25,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289254434] [2020-09-25 00:04:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:25,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:25,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:25,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 00:04:25,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:25,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-09-25 00:04:25,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:25,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:04:25,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:25,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:04:25,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:25,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:25,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:25,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:25,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:25,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:25,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:04:25,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:25,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:25,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:25,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:25,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:25,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289254434] [2020-09-25 00:04:25,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:25,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 00:04:25,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798309355] [2020-09-25 00:04:25,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 00:04:25,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:25,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 00:04:25,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:04:25,529 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-09-25 00:04:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:25,653 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-09-25 00:04:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 00:04:25,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-25 00:04:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:25,656 INFO L225 Difference]: With dead ends: 70 [2020-09-25 00:04:25,656 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 00:04:25,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:04:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 00:04:25,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-09-25 00:04:25,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-25 00:04:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-09-25 00:04:25,665 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2020-09-25 00:04:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:25,666 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-09-25 00:04:25,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 00:04:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-09-25 00:04:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 00:04:25,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:25,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:25,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:04:25,668 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:25,669 INFO L82 PathProgramCache]: Analyzing trace with hash 231352676, now seen corresponding path program 2 times [2020-09-25 00:04:25,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:25,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764679133] [2020-09-25 00:04:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:25,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:25,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:26,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 00:04:26,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:26,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-09-25 00:04:26,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:26,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:04:26,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:26,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 00:04:26,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:26,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:26,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:26,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:26,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:26,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:26,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:26,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:26,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:26,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:26,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:26,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764679133] [2020-09-25 00:04:26,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:26,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 00:04:26,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448569366] [2020-09-25 00:04:26,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:04:26,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:26,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:04:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:04:26,120 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 8 states. [2020-09-25 00:04:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:26,287 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-09-25 00:04:26,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 00:04:26,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 00:04:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:26,289 INFO L225 Difference]: With dead ends: 77 [2020-09-25 00:04:26,289 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 00:04:26,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:04:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 00:04:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2020-09-25 00:04:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 00:04:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-09-25 00:04:26,299 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 33 [2020-09-25 00:04:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:26,299 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-09-25 00:04:26,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:04:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-09-25 00:04:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 00:04:26,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:26,301 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-25 00:04:26,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:04:26,302 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1221138549, now seen corresponding path program 3 times [2020-09-25 00:04:26,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:26,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447032599] [2020-09-25 00:04:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:26,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:27,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 00:04:27,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:27,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-09-25 00:04:27,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:27,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:04:27,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:27,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 00:04:27,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:27,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:27,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:27,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:27,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:27,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:27,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:27,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:27,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:27,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:27,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447032599] [2020-09-25 00:04:27,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:27,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 00:04:27,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402077016] [2020-09-25 00:04:27,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 00:04:27,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 00:04:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:04:27,211 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 10 states. [2020-09-25 00:04:27,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:27,421 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-09-25 00:04:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 00:04:27,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-25 00:04:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:27,423 INFO L225 Difference]: With dead ends: 84 [2020-09-25 00:04:27,423 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 00:04:27,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:04:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 00:04:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-09-25 00:04:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 00:04:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-25 00:04:27,432 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 40 [2020-09-25 00:04:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:27,433 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-25 00:04:27,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 00:04:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-25 00:04:27,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 00:04:27,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:27,435 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-09-25 00:04:27,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:04:27,435 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1927496772, now seen corresponding path program 4 times [2020-09-25 00:04:27,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:27,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176174434] [2020-09-25 00:04:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:27,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:28,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:28,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 00:04:28,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:28,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-09-25 00:04:28,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:28,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:04:28,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:28,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 00:04:28,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:28,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:28,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:28,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:28,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:28,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:28,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 00:04:28,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:28,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:28,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176174434] [2020-09-25 00:04:28,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:28,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 00:04:28,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332983778] [2020-09-25 00:04:28,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 00:04:28,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 00:04:28,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:04:28,679 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 12 states. [2020-09-25 00:04:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:28,880 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-09-25 00:04:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 00:04:28,880 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-09-25 00:04:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:28,881 INFO L225 Difference]: With dead ends: 91 [2020-09-25 00:04:28,882 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 00:04:28,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:04:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 00:04:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-09-25 00:04:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 00:04:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-09-25 00:04:28,890 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 47 [2020-09-25 00:04:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:28,891 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-09-25 00:04:28,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 00:04:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-09-25 00:04:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-25 00:04:28,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:28,893 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-09-25 00:04:28,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:04:28,893 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:28,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1764098453, now seen corresponding path program 5 times [2020-09-25 00:04:28,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:28,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565609502] [2020-09-25 00:04:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:28,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:28,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:30,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:30,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-25 00:04:30,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:30,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-09-25 00:04:30,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:04:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 00:04:30,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:30,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:30,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:30,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:30,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:30,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:30,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:30,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:30,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:30,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:30,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:30,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:30,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565609502] [2020-09-25 00:04:30,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:30,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 00:04:30,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837850285] [2020-09-25 00:04:30,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 00:04:30,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:30,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 00:04:30,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-25 00:04:30,371 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 14 states. [2020-09-25 00:04:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:30,645 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-09-25 00:04:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 00:04:30,646 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-09-25 00:04:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:30,647 INFO L225 Difference]: With dead ends: 98 [2020-09-25 00:04:30,647 INFO L226 Difference]: Without dead ends: 80 [2020-09-25 00:04:30,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:04:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-25 00:04:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2020-09-25 00:04:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 00:04:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-09-25 00:04:30,656 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 54 [2020-09-25 00:04:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:30,656 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-09-25 00:04:30,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 00:04:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-09-25 00:04:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 00:04:30,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:30,658 INFO L422 BasicCegarLoop]: trace histogram [6, 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] [2020-09-25 00:04:30,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:04:30,659 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:30,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1627641636, now seen corresponding path program 6 times [2020-09-25 00:04:30,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:30,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842603033] [2020-09-25 00:04:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:30,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:30,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:31,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:31,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 00:04:31,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:31,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-09-25 00:04:31,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:31,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 00:04:31,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:31,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 00:04:31,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:32,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:32,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:32,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:32,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:32,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:32,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:32,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:32,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:32,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:32,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:32,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:32,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842603033] [2020-09-25 00:04:32,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:32,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 00:04:32,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201437745] [2020-09-25 00:04:32,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 00:04:32,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:32,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 00:04:32,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:04:32,028 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 16 states. [2020-09-25 00:04:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:32,495 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2020-09-25 00:04:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 00:04:32,496 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-09-25 00:04:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:32,500 INFO L225 Difference]: With dead ends: 105 [2020-09-25 00:04:32,501 INFO L226 Difference]: Without dead ends: 87 [2020-09-25 00:04:32,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-25 00:04:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-25 00:04:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2020-09-25 00:04:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 00:04:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-09-25 00:04:32,521 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 61 [2020-09-25 00:04:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:32,521 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-09-25 00:04:32,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 00:04:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-09-25 00:04:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 00:04:32,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:32,528 INFO L422 BasicCegarLoop]: trace histogram [7, 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] [2020-09-25 00:04:32,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:04:32,531 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:32,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:32,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1482394955, now seen corresponding path program 7 times [2020-09-25 00:04:32,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:32,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504837297] [2020-09-25 00:04:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:32,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:32,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:34,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:34,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 00:04:34,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:34,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1507 [2020-09-25 00:04:34,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:04:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 00:04:34,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:34,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:34,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:34,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:34,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:34,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:34,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:34,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:34,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:34,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:34,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:34,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:34,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504837297] [2020-09-25 00:04:34,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:34,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 00:04:34,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806154502] [2020-09-25 00:04:34,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 00:04:34,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:34,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 00:04:34,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-25 00:04:34,323 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 18 states. [2020-09-25 00:04:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:34,683 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-09-25 00:04:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 00:04:34,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-09-25 00:04:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:34,685 INFO L225 Difference]: With dead ends: 112 [2020-09-25 00:04:34,685 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 00:04:34,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-25 00:04:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 00:04:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2020-09-25 00:04:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 00:04:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-09-25 00:04:34,702 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 68 [2020-09-25 00:04:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:34,703 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-09-25 00:04:34,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 00:04:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-09-25 00:04:34,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 00:04:34,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:34,707 INFO L422 BasicCegarLoop]: trace histogram [8, 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] [2020-09-25 00:04:34,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:04:34,707 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:34,710 INFO L82 PathProgramCache]: Analyzing trace with hash -642129404, now seen corresponding path program 8 times [2020-09-25 00:04:34,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:34,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597502936] [2020-09-25 00:04:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:34,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:34,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:36,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:36,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 00:04:36,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:36,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-09-25 00:04:36,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 00:04:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 00:04:36,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:36,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:36,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:36,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:36,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:36,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:36,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:04:36,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:36,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:36,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597502936] [2020-09-25 00:04:36,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:36,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 00:04:36,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273094042] [2020-09-25 00:04:36,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 00:04:36,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:36,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 00:04:36,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:04:36,862 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 20 states. [2020-09-25 00:04:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:37,284 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2020-09-25 00:04:37,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 00:04:37,285 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-09-25 00:04:37,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:37,286 INFO L225 Difference]: With dead ends: 119 [2020-09-25 00:04:37,286 INFO L226 Difference]: Without dead ends: 101 [2020-09-25 00:04:37,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 00:04:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-25 00:04:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2020-09-25 00:04:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-25 00:04:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-09-25 00:04:37,298 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 75 [2020-09-25 00:04:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:37,299 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-09-25 00:04:37,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 00:04:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-09-25 00:04:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-25 00:04:37,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:37,303 INFO L422 BasicCegarLoop]: trace histogram [9, 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] [2020-09-25 00:04:37,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 00:04:37,304 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:37,304 INFO L82 PathProgramCache]: Analyzing trace with hash -956929067, now seen corresponding path program 9 times [2020-09-25 00:04:37,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:37,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908648313] [2020-09-25 00:04:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:37,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:37,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:39,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:39,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-25 00:04:39,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:39,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2030 [2020-09-25 00:04:39,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:39,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 00:04:39,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:39,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 00:04:39,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:39,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:39,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:39,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:39,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:39,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:39,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:39,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:39,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:39,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:39,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:39,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:39,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908648313] [2020-09-25 00:04:39,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:39,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 00:04:39,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201507275] [2020-09-25 00:04:39,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 00:04:39,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:39,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 00:04:39,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-25 00:04:39,723 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 22 states. [2020-09-25 00:04:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:40,308 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-09-25 00:04:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 00:04:40,308 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-09-25 00:04:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:40,310 INFO L225 Difference]: With dead ends: 126 [2020-09-25 00:04:40,311 INFO L226 Difference]: Without dead ends: 108 [2020-09-25 00:04:40,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 00:04:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-25 00:04:40,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2020-09-25 00:04:40,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-25 00:04:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-09-25 00:04:40,326 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 82 [2020-09-25 00:04:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:40,326 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-09-25 00:04:40,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 00:04:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-09-25 00:04:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 00:04:40,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:40,333 INFO L422 BasicCegarLoop]: trace histogram [10, 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] [2020-09-25 00:04:40,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 00:04:40,333 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:40,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:40,334 INFO L82 PathProgramCache]: Analyzing trace with hash 236152036, now seen corresponding path program 10 times [2020-09-25 00:04:40,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:40,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871061948] [2020-09-25 00:04:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:40,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:40,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:42,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:42,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-25 00:04:42,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:42,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-09-25 00:04:42,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 00:04:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:42,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 00:04:42,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:42,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:42,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:42,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:42,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:42,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:42,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:42,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:42,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:42,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:42,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:42,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:42,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871061948] [2020-09-25 00:04:42,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:43,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 00:04:43,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408190920] [2020-09-25 00:04:43,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 00:04:43,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 00:04:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:04:43,002 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 24 states. [2020-09-25 00:04:43,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:43,570 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2020-09-25 00:04:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-25 00:04:43,570 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-09-25 00:04:43,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:43,571 INFO L225 Difference]: With dead ends: 133 [2020-09-25 00:04:43,572 INFO L226 Difference]: Without dead ends: 115 [2020-09-25 00:04:43,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 00:04:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-25 00:04:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2020-09-25 00:04:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-25 00:04:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-09-25 00:04:43,578 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 89 [2020-09-25 00:04:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:43,578 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-09-25 00:04:43,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 00:04:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-09-25 00:04:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-25 00:04:43,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:43,580 INFO L422 BasicCegarLoop]: trace histogram [11, 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] [2020-09-25 00:04:43,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 00:04:43,580 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash -363991819, now seen corresponding path program 11 times [2020-09-25 00:04:43,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:43,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009995537] [2020-09-25 00:04:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:43,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:43,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:46,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:46,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-25 00:04:46,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:46,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2635 [2020-09-25 00:04:46,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 00:04:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 00:04:46,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:46,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:46,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:46,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:46,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:46,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:46,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:04:46,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:46,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:46,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:46,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:46,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:46,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009995537] [2020-09-25 00:04:46,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:46,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 00:04:46,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219695043] [2020-09-25 00:04:46,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 00:04:46,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 00:04:46,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-25 00:04:46,582 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 26 states. [2020-09-25 00:04:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:47,355 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-09-25 00:04:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-25 00:04:47,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-09-25 00:04:47,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:47,357 INFO L225 Difference]: With dead ends: 140 [2020-09-25 00:04:47,357 INFO L226 Difference]: Without dead ends: 122 [2020-09-25 00:04:47,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 00:04:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-25 00:04:47,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2020-09-25 00:04:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 00:04:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-09-25 00:04:47,364 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 96 [2020-09-25 00:04:47,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:47,365 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-09-25 00:04:47,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 00:04:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-09-25 00:04:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-25 00:04:47,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:47,366 INFO L422 BasicCegarLoop]: trace histogram [12, 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] [2020-09-25 00:04:47,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 00:04:47,367 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:47,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:47,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1050566596, now seen corresponding path program 12 times [2020-09-25 00:04:47,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:47,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347469884] [2020-09-25 00:04:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:47,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:47,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:50,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:50,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-25 00:04:50,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:50,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2909 [2020-09-25 00:04:50,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 00:04:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:50,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-25 00:04:50,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:50,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:50,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:50,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:50,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:50,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:50,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:50,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:50,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:50,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:50,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347469884] [2020-09-25 00:04:50,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:50,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-25 00:04:50,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926149093] [2020-09-25 00:04:50,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-25 00:04:50,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-25 00:04:50,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-25 00:04:50,771 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 28 states. [2020-09-25 00:04:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:51,793 INFO L93 Difference]: Finished difference Result 147 states and 153 transitions. [2020-09-25 00:04:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-25 00:04:51,794 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 103 [2020-09-25 00:04:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:51,796 INFO L225 Difference]: With dead ends: 147 [2020-09-25 00:04:51,796 INFO L226 Difference]: Without dead ends: 129 [2020-09-25 00:04:51,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 00:04:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-25 00:04:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2020-09-25 00:04:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-25 00:04:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2020-09-25 00:04:51,808 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 103 [2020-09-25 00:04:51,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:51,808 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2020-09-25 00:04:51,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-25 00:04:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2020-09-25 00:04:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-25 00:04:51,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:51,815 INFO L422 BasicCegarLoop]: trace histogram [13, 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] [2020-09-25 00:04:51,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 00:04:51,816 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1252198891, now seen corresponding path program 13 times [2020-09-25 00:04:51,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:51,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655682497] [2020-09-25 00:04:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:51,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:52,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:55,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:55,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-25 00:04:55,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:55,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3260 [2020-09-25 00:04:55,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:55,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 00:04:55,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:55,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-25 00:04:55,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:55,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:55,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:55,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:55,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:55,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:55,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:55,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:55,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:55,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655682497] [2020-09-25 00:04:55,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:55,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 00:04:55,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988400415] [2020-09-25 00:04:55,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 00:04:55,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:55,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 00:04:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-25 00:04:55,565 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 30 states. [2020-09-25 00:04:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:56,542 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-09-25 00:04:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-25 00:04:56,544 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2020-09-25 00:04:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:56,546 INFO L225 Difference]: With dead ends: 154 [2020-09-25 00:04:56,546 INFO L226 Difference]: Without dead ends: 136 [2020-09-25 00:04:56,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 00:04:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-25 00:04:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2020-09-25 00:04:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 00:04:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-09-25 00:04:56,553 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 110 [2020-09-25 00:04:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:56,553 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-09-25 00:04:56,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 00:04:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-09-25 00:04:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-25 00:04:56,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:56,556 INFO L422 BasicCegarLoop]: trace histogram [14, 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] [2020-09-25 00:04:56,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 00:04:56,556 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:56,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1687629148, now seen corresponding path program 14 times [2020-09-25 00:04:56,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:56,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018600097] [2020-09-25 00:04:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:56,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:56,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:59,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:59,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-25 00:04:59,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:59,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3198 [2020-09-25 00:04:59,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:59,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-25 00:04:59,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:04:59,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-25 00:04:59,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:00,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:00,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:00,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:00,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:05:00,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:00,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:05:00,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:00,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:00,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:00,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018600097] [2020-09-25 00:05:00,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:00,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-25 00:05:00,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553949825] [2020-09-25 00:05:00,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-25 00:05:00,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:00,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-25 00:05:00,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-25 00:05:00,282 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 32 states. [2020-09-25 00:05:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:01,391 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2020-09-25 00:05:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-25 00:05:01,391 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 117 [2020-09-25 00:05:01,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:01,394 INFO L225 Difference]: With dead ends: 161 [2020-09-25 00:05:01,394 INFO L226 Difference]: Without dead ends: 143 [2020-09-25 00:05:01,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-25 00:05:01,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-25 00:05:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 134. [2020-09-25 00:05:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-25 00:05:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2020-09-25 00:05:01,402 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 117 [2020-09-25 00:05:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:01,402 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2020-09-25 00:05:01,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-25 00:05:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2020-09-25 00:05:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-25 00:05:01,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:01,404 INFO L422 BasicCegarLoop]: trace histogram [15, 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] [2020-09-25 00:05:01,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 00:05:01,404 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1817544501, now seen corresponding path program 15 times [2020-09-25 00:05:01,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:01,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583423455] [2020-09-25 00:05:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:01,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:02,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:05,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:05,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-09-25 00:05:05,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:05:05,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3888 [2020-09-25 00:05:05,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:05,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 00:05:05,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:05:05,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-09-25 00:05:05,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:05,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:05,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:05,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:05,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:05:05,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:05,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:05:05,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:05,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:05,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:05,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:05,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:05,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583423455] [2020-09-25 00:05:05,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:05,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-25 00:05:05,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044458124] [2020-09-25 00:05:05,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-25 00:05:05,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:05,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-25 00:05:05,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 00:05:05,965 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand 34 states. [2020-09-25 00:05:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:07,160 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2020-09-25 00:05:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-25 00:05:07,160 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 124 [2020-09-25 00:05:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:07,162 INFO L225 Difference]: With dead ends: 168 [2020-09-25 00:05:07,163 INFO L226 Difference]: Without dead ends: 150 [2020-09-25 00:05:07,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-25 00:05:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-25 00:05:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 141. [2020-09-25 00:05:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-25 00:05:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2020-09-25 00:05:07,171 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 124 [2020-09-25 00:05:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:07,171 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2020-09-25 00:05:07,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-25 00:05:07,171 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2020-09-25 00:05:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-25 00:05:07,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:07,173 INFO L422 BasicCegarLoop]: trace histogram [16, 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] [2020-09-25 00:05:07,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 00:05:07,173 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash 604028292, now seen corresponding path program 16 times [2020-09-25 00:05:07,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:07,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800817358] [2020-09-25 00:05:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:07,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:07,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:11,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:11,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-25 00:05:11,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:05:11,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3900 [2020-09-25 00:05:11,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:11,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 00:05:11,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 00:05:11,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-25 00:05:11,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:11,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:11,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:11,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:11,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:05:11,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:11,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:05:11,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:11,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:11,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:11,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:11,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:11,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800817358] [2020-09-25 00:05:11,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:11,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-25 00:05:11,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247745292] [2020-09-25 00:05:11,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-25 00:05:11,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:11,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-25 00:05:11,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 00:05:11,828 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand 36 states.