/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:14:58,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:14:58,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:14:58,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:14:58,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:14:58,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:14:58,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:14:58,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:14:58,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:14:58,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:14:58,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:14:58,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:14:58,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:14:58,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:14:58,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:14:58,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:14:58,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:14:58,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:14:58,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:14:58,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:14:58,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:14:58,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:14:58,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:14:58,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:14:58,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 02:14:58,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:14:58,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:14:58,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:14:58,277 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 [2020-08-22 02:14:58,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:14:58,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:14:58,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:14:58,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:14:58,301 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:14:58,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:14:58,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:14:58,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:14:58,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:14:58,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:14:58,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:14:58,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:14:58,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:14:58,303 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:14:58,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:14:58,303 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:14:58,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:14:58,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:14:58,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:14:58,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:14:58,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:14:58,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:14:58,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:14:58,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:14:58,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:14:58,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:14:58,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:14:58,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:14:58,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:14:58,306 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:14:58,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:14:58,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:14:58,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:14:58,671 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:14:58,672 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:14:58,673 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-08-22 02:14:58,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b64918e0e/7e57416c59314660bc2259c0f9049251/FLAGcd313febf [2020-08-22 02:14:59,163 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:14:59,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-08-22 02:14:59,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b64918e0e/7e57416c59314660bc2259c0f9049251/FLAGcd313febf [2020-08-22 02:14:59,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b64918e0e/7e57416c59314660bc2259c0f9049251 [2020-08-22 02:14:59,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:14:59,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:14:59,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:59,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:14:59,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:14:59,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:59" (1/1) ... [2020-08-22 02:14:59,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@391177e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59, skipping insertion in model container [2020-08-22 02:14:59,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:59" (1/1) ... [2020-08-22 02:14:59,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:14:59,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:14:59,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:59,825 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:14:59,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:59,950 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:14:59,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59 WrapperNode [2020-08-22 02:14:59,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:59,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:14:59,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:14:59,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:14:59,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59" (1/1) ... [2020-08-22 02:14:59,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59" (1/1) ... [2020-08-22 02:14:59,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59" (1/1) ... [2020-08-22 02:14:59,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59" (1/1) ... [2020-08-22 02:14:59,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59" (1/1) ... [2020-08-22 02:14:59,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59" (1/1) ... [2020-08-22 02:14:59,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59" (1/1) ... [2020-08-22 02:14:59,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:14:59,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:15:00,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:15:00,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:15:00,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59" (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 [2020-08-22 02:15:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:15:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:15:00,068 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-22 02:15:00,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:15:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:15:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:15:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 02:15:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 02:15:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 02:15:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:15:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 02:15:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 02:15:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 02:15:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 02:15:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:15:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:15:00,347 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:15:00,348 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 02:15:00,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:15:00 BoogieIcfgContainer [2020-08-22 02:15:00,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:15:00,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:15:00,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:15:00,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:15:00,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:14:59" (1/3) ... [2020-08-22 02:15:00,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410a3509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:15:00, skipping insertion in model container [2020-08-22 02:15:00,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:59" (2/3) ... [2020-08-22 02:15:00,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410a3509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:15:00, skipping insertion in model container [2020-08-22 02:15:00,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:15:00" (3/3) ... [2020-08-22 02:15:00,364 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-08-22 02:15:00,398 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:15:00,413 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:15:00,448 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:15:00,479 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:15:00,479 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:15:00,480 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:15:00,480 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:15:00,480 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:15:00,480 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:15:00,480 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:15:00,480 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:15:00,497 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-22 02:15:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 02:15:00,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:00,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:00,504 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2020-08-22 02:15:00,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:00,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75418426] [2020-08-22 02:15:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:00,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:00,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 02:15:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:00,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75418426] [2020-08-22 02:15:00,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:00,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:15:00,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220098757] [2020-08-22 02:15:00,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:15:00,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:00,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:15:00,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:15:00,753 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-22 02:15:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:00,895 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-08-22 02:15:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:15:00,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 02:15:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:00,912 INFO L225 Difference]: With dead ends: 42 [2020-08-22 02:15:00,912 INFO L226 Difference]: Without dead ends: 20 [2020-08-22 02:15:00,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:15:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-22 02:15:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-22 02:15:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 02:15:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-22 02:15:00,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-08-22 02:15:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:00,950 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-22 02:15:00,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:15:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-22 02:15:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 02:15:00,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:00,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:00,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:15:00,953 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2020-08-22 02:15:00,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:00,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930127511] [2020-08-22 02:15:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 02:15:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:01,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930127511] [2020-08-22 02:15:01,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:01,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:15:01,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248959651] [2020-08-22 02:15:01,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:15:01,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:01,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:15:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:01,073 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-08-22 02:15:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:01,152 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-08-22 02:15:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:15:01,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-22 02:15:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:01,154 INFO L225 Difference]: With dead ends: 34 [2020-08-22 02:15:01,154 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 02:15:01,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 02:15:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-22 02:15:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 02:15:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 02:15:01,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-08-22 02:15:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:01,163 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 02:15:01,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:15:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 02:15:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 02:15:01,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:01,165 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] [2020-08-22 02:15:01,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:15:01,166 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:01,166 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2020-08-22 02:15:01,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:01,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731430242] [2020-08-22 02:15:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 02:15:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:01,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731430242] [2020-08-22 02:15:01,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:01,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 02:15:01,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221459930] [2020-08-22 02:15:01,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:15:01,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:01,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:15:01,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:15:01,268 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-08-22 02:15:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:01,337 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-08-22 02:15:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:15:01,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-22 02:15:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:01,339 INFO L225 Difference]: With dead ends: 36 [2020-08-22 02:15:01,339 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 02:15:01,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:15:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 02:15:01,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-22 02:15:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 02:15:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-22 02:15:01,347 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-08-22 02:15:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:01,348 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-22 02:15:01,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:15:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-22 02:15:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:15:01,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:01,349 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:01,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:15:01,350 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash -9513713, now seen corresponding path program 2 times [2020-08-22 02:15:01,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:01,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436279477] [2020-08-22 02:15:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 02:15:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:01,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436279477] [2020-08-22 02:15:01,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:01,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 02:15:01,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970754848] [2020-08-22 02:15:01,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:15:01,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:01,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:15:01,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:15:01,485 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-22 02:15:01,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:01,572 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-22 02:15:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 02:15:01,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-22 02:15:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:01,574 INFO L225 Difference]: With dead ends: 38 [2020-08-22 02:15:01,574 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 02:15:01,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:15:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 02:15:01,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-22 02:15:01,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 02:15:01,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-22 02:15:01,587 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-08-22 02:15:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:01,587 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-22 02:15:01,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:15:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-22 02:15:01,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 02:15:01,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:01,589 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:01,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:15:01,590 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:01,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:01,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2113766385, now seen corresponding path program 3 times [2020-08-22 02:15:01,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:01,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727929501] [2020-08-22 02:15:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 02:15:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:01,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727929501] [2020-08-22 02:15:01,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:01,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 02:15:01,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604546862] [2020-08-22 02:15:01,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:15:01,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:01,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:15:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:15:01,718 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-08-22 02:15:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:01,815 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-08-22 02:15:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:15:01,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-22 02:15:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:01,816 INFO L225 Difference]: With dead ends: 40 [2020-08-22 02:15:01,816 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 02:15:01,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:15:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 02:15:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-22 02:15:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 02:15:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 02:15:01,823 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-08-22 02:15:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:01,823 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 02:15:01,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:15:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 02:15:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 02:15:01,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:01,825 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:01,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:15:01,825 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1818492333, now seen corresponding path program 4 times [2020-08-22 02:15:01,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:01,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941249696] [2020-08-22 02:15:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 02:15:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:01,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941249696] [2020-08-22 02:15:01,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:01,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 02:15:01,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230628765] [2020-08-22 02:15:01,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 02:15:01,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:01,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 02:15:01,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:15:01,943 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-08-22 02:15:02,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:02,023 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-22 02:15:02,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 02:15:02,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-22 02:15:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:02,025 INFO L225 Difference]: With dead ends: 42 [2020-08-22 02:15:02,025 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 02:15:02,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:15:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 02:15:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-22 02:15:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 02:15:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-08-22 02:15:02,031 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-08-22 02:15:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:02,032 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-08-22 02:15:02,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 02:15:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-08-22 02:15:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 02:15:02,033 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:02,033 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:02,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:15:02,034 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1147899851, now seen corresponding path program 5 times [2020-08-22 02:15:02,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:02,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538132159] [2020-08-22 02:15:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 02:15:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:02,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538132159] [2020-08-22 02:15:02,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:02,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 02:15:02,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204873087] [2020-08-22 02:15:02,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:15:02,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:02,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:15:02,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:15:02,145 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-08-22 02:15:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:02,233 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-08-22 02:15:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:15:02,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-22 02:15:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:02,234 INFO L225 Difference]: With dead ends: 44 [2020-08-22 02:15:02,234 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 02:15:02,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:15:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 02:15:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-22 02:15:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 02:15:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-22 02:15:02,240 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-08-22 02:15:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:02,241 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-22 02:15:02,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:15:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-22 02:15:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 02:15:02,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:02,242 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:02,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:15:02,243 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:02,243 INFO L82 PathProgramCache]: Analyzing trace with hash -953619049, now seen corresponding path program 6 times [2020-08-22 02:15:02,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:02,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952966950] [2020-08-22 02:15:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 02:15:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:02,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952966950] [2020-08-22 02:15:02,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:02,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:15:02,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941718674] [2020-08-22 02:15:02,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:15:02,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:02,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:15:02,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:15:02,371 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-08-22 02:15:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:02,506 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-08-22 02:15:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 02:15:02,507 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-22 02:15:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:02,508 INFO L225 Difference]: With dead ends: 46 [2020-08-22 02:15:02,508 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 02:15:02,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:15:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 02:15:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-22 02:15:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 02:15:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 02:15:02,515 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-08-22 02:15:02,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:02,515 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 02:15:02,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:15:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 02:15:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 02:15:02,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:02,517 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:02,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:15:02,517 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1066637945, now seen corresponding path program 7 times [2020-08-22 02:15:02,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:02,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034828786] [2020-08-22 02:15:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 02:15:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:02,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034828786] [2020-08-22 02:15:02,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:02,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 02:15:02,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094368402] [2020-08-22 02:15:02,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 02:15:02,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:02,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 02:15:02,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:15:02,689 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-22 02:15:02,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:02,825 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-22 02:15:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 02:15:02,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-22 02:15:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:02,826 INFO L225 Difference]: With dead ends: 48 [2020-08-22 02:15:02,826 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 02:15:02,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:15:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 02:15:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-22 02:15:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 02:15:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-08-22 02:15:02,832 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-08-22 02:15:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:02,833 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-08-22 02:15:02,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 02:15:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-08-22 02:15:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 02:15:02,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:02,834 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:02,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:15:02,834 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:02,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1208391387, now seen corresponding path program 8 times [2020-08-22 02:15:02,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:02,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625657715] [2020-08-22 02:15:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 02:15:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:02,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625657715] [2020-08-22 02:15:02,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:02,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 02:15:02,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075030793] [2020-08-22 02:15:02,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 02:15:02,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 02:15:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 02:15:02,982 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-08-22 02:15:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:03,075 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-08-22 02:15:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 02:15:03,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-22 02:15:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:03,077 INFO L225 Difference]: With dead ends: 50 [2020-08-22 02:15:03,077 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 02:15:03,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 02:15:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 02:15:03,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-22 02:15:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 02:15:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-22 02:15:03,083 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-08-22 02:15:03,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:03,083 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-22 02:15:03,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 02:15:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-22 02:15:03,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 02:15:03,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:03,085 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:03,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:15:03,085 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash -5504323, now seen corresponding path program 9 times [2020-08-22 02:15:03,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:03,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136809512] [2020-08-22 02:15:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:03,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:03,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 02:15:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:03,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136809512] [2020-08-22 02:15:03,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:03,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 02:15:03,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034846656] [2020-08-22 02:15:03,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 02:15:03,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:03,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 02:15:03,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-22 02:15:03,238 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2020-08-22 02:15:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:03,340 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-08-22 02:15:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 02:15:03,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-22 02:15:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:03,341 INFO L225 Difference]: With dead ends: 51 [2020-08-22 02:15:03,341 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 02:15:03,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-22 02:15:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 02:15:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 02:15:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 02:15:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 02:15:03,351 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-08-22 02:15:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:03,352 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 02:15:03,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 02:15:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 02:15:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 02:15:03,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:03,353 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:03,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:15:03,353 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:03,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:03,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1671822879, now seen corresponding path program 10 times [2020-08-22 02:15:03,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:03,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280725201] [2020-08-22 02:15:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:13,462 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 8 [2020-08-22 02:15:14,552 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 11 [2020-08-22 02:15:18,784 WARN L193 SmtUtils]: Spent 3.89 s on a formula simplification. DAG size of input: 1063 DAG size of output: 8 [2020-08-22 02:15:47,092 WARN L193 SmtUtils]: Spent 27.52 s on a formula simplification. DAG size of input: 2458 DAG size of output: 8 [2020-08-22 02:15:47,398 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-08-22 02:15:47,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:47,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 02:15:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 02:15:47,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280725201] [2020-08-22 02:15:47,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:47,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 02:15:47,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945610420] [2020-08-22 02:15:47,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 02:15:47,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:47,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 02:15:47,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-22 02:15:47,503 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-08-22 02:15:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:48,010 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 02:15:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 02:15:48,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-08-22 02:15:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:48,012 INFO L225 Difference]: With dead ends: 49 [2020-08-22 02:15:48,013 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 02:15:48,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:15:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 02:15:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-22 02:15:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 02:15:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-08-22 02:15:48,025 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-08-22 02:15:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:48,025 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-08-22 02:15:48,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 02:15:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-08-22 02:15:48,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 02:15:48,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:48,030 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:48,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:15:48,031 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:48,032 INFO L82 PathProgramCache]: Analyzing trace with hash 443458522, now seen corresponding path program 1 times [2020-08-22 02:15:48,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:48,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277215760] [2020-08-22 02:15:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:52,219 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 8 [2020-08-22 02:15:53,275 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 8 [2020-08-22 02:15:57,488 WARN L193 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 830 DAG size of output: 8 [2020-08-22 02:15:57,696 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-08-22 02:15:58,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:58,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 02:15:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 02:15:58,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277215760] [2020-08-22 02:15:58,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:58,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 02:15:58,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987547922] [2020-08-22 02:15:58,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 02:15:58,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:58,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 02:15:58,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-08-22 02:15:58,137 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2020-08-22 02:15:59,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:59,144 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-22 02:15:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 02:15:59,145 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-08-22 02:15:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:59,147 INFO L225 Difference]: With dead ends: 48 [2020-08-22 02:15:59,147 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 02:15:59,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-08-22 02:15:59,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 02:15:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-22 02:15:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 02:15:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-22 02:15:59,157 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-08-22 02:15:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:59,158 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-22 02:15:59,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 02:15:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-22 02:15:59,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 02:15:59,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:59,159 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:59,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:15:59,159 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:59,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1101317845, now seen corresponding path program 2 times [2020-08-22 02:15:59,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:59,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532591859] [2020-08-22 02:15:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat