/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:21:34,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:21:34,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:21:34,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 06:21:34,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:21:34,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:21:34,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:21:34,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:21:34,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:21:34,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:21:34,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:21:34,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:21:34,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:21:34,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:21:34,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:21:34,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:21:34,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 06:21:34,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:21:34,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:21:34,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:21:34,986 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 06:21:35,009 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:21:35,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:21:35,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:21:35,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:21:35,011 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:21:35,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:21:35,012 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:21:35,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:21:35,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:21:35,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:21:35,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:21:35,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:21:35,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:21:35,016 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:21:35,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:21:35,016 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:21:35,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:21:35,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:21:35,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:21:35,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:21:35,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:21:35,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:21:35,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:21:35,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:21:35,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:21:35,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:21:35,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:21:35,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:21:35,022 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:21:35,022 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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:21:35,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:21:35,378 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:21:35,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:21:35,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:21:35,395 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:21:35,396 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-22 06:21:35,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f1b6035d/0c526c2edb7443919f18bc00b9de0558/FLAGf9c8bfe63 [2020-08-22 06:21:36,121 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:21:36,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-22 06:21:36,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f1b6035d/0c526c2edb7443919f18bc00b9de0558/FLAGf9c8bfe63 [2020-08-22 06:21:36,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f1b6035d/0c526c2edb7443919f18bc00b9de0558 [2020-08-22 06:21:36,354 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:21:36,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:21:36,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:21:36,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:21:36,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:21:36,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:21:36" (1/1) ... [2020-08-22 06:21:36,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a86aac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:36, skipping insertion in model container [2020-08-22 06:21:36,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:21:36" (1/1) ... [2020-08-22 06:21:36,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:21:36,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:21:36,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:21:36,987 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:21:37,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:21:37,301 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:21:37,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:37 WrapperNode [2020-08-22 06:21:37,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:21:37,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:21:37,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:21:37,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:21:37,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:37" (1/1) ... [2020-08-22 06:21:37,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:37" (1/1) ... [2020-08-22 06:21:37,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:37" (1/1) ... [2020-08-22 06:21:37,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:37" (1/1) ... [2020-08-22 06:21:37,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:37" (1/1) ... [2020-08-22 06:21:37,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:37" (1/1) ... [2020-08-22 06:21:37,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:37" (1/1) ... [2020-08-22 06:21:37,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:21:37,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:21:37,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:21:37,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:21:37,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:37" (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 06:21:37,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:21:37,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:21:37,538 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-22 06:21:37,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:21:37,539 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-22 06:21:37,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:21:37,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:21:37,540 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 06:21:37,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:21:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:21:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:21:38,985 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:21:38,985 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 06:21:38,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:21:38 BoogieIcfgContainer [2020-08-22 06:21:38,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:21:38,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:21:38,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:21:38,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:21:38,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:21:36" (1/3) ... [2020-08-22 06:21:38,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbc50e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:21:38, skipping insertion in model container [2020-08-22 06:21:38,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:21:37" (2/3) ... [2020-08-22 06:21:39,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbc50e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:21:38, skipping insertion in model container [2020-08-22 06:21:39,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:21:38" (3/3) ... [2020-08-22 06:21:39,002 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2020-08-22 06:21:39,013 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:21:39,022 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:21:39,037 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:21:39,066 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:21:39,066 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:21:39,066 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:21:39,067 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:21:39,067 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:21:39,067 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:21:39,067 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:21:39,067 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:21:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-22 06:21:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 06:21:39,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:21:39,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:21:39,103 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:21:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:21:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash -184228989, now seen corresponding path program 1 times [2020-08-22 06:21:39,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:21:39,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040095662] [2020-08-22 06:21:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:21:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:39,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:21:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:39,640 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 06:21:39,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040095662] [2020-08-22 06:21:39,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:21:39,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:21:39,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523988333] [2020-08-22 06:21:39,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:21:39,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:21:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:21:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:21:39,671 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-22 06:21:42,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:21:42,480 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-22 06:21:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 06:21:42,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-08-22 06:21:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:21:42,503 INFO L225 Difference]: With dead ends: 886 [2020-08-22 06:21:42,503 INFO L226 Difference]: Without dead ends: 564 [2020-08-22 06:21:42,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:21:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-22 06:21:42,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-22 06:21:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-22 06:21:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-22 06:21:42,616 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 60 [2020-08-22 06:21:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:21:42,620 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-22 06:21:42,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:21:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-22 06:21:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-22 06:21:42,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:21:42,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:21:42,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:21:42,630 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:21:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:21:42,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2117260534, now seen corresponding path program 1 times [2020-08-22 06:21:42,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:21:42,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905860671] [2020-08-22 06:21:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:21:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:42,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:21:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:42,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:21:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:21:42,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905860671] [2020-08-22 06:21:42,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:21:43,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 06:21:43,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732510474] [2020-08-22 06:21:43,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 06:21:43,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:21:43,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 06:21:43,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:21:43,004 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-22 06:21:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:21:45,011 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-22 06:21:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 06:21:45,011 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-08-22 06:21:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:21:45,020 INFO L225 Difference]: With dead ends: 1518 [2020-08-22 06:21:45,020 INFO L226 Difference]: Without dead ends: 964 [2020-08-22 06:21:45,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:21:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-22 06:21:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-22 06:21:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-22 06:21:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-22 06:21:45,093 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 154 [2020-08-22 06:21:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:21:45,094 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-22 06:21:45,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 06:21:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-22 06:21:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 06:21:45,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:21:45,101 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:21:45,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:21:45,102 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:21:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:21:45,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1698067270, now seen corresponding path program 1 times [2020-08-22 06:21:45,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:21:45,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323185113] [2020-08-22 06:21:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:21:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:45,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:21:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:45,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:21:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:21:45,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323185113] [2020-08-22 06:21:45,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:21:45,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 06:21:45,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789562192] [2020-08-22 06:21:45,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:21:45,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:21:45,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:21:45,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:21:45,542 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-22 06:21:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:21:47,628 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-22 06:21:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:21:47,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-08-22 06:21:47,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:21:47,649 INFO L225 Difference]: With dead ends: 2490 [2020-08-22 06:21:47,650 INFO L226 Difference]: Without dead ends: 1552 [2020-08-22 06:21:47,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-22 06:21:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-22 06:21:47,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-22 06:21:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-22 06:21:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-22 06:21:47,737 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 200 [2020-08-22 06:21:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:21:47,739 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-22 06:21:47,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:21:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-22 06:21:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-22 06:21:47,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:21:47,750 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:21:47,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:21:47,751 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:21:47,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:21:47,752 INFO L82 PathProgramCache]: Analyzing trace with hash 328652488, now seen corresponding path program 1 times [2020-08-22 06:21:47,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:21:47,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409841854] [2020-08-22 06:21:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:21:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:47,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:21:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:47,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:21:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:48,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 06:21:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 106 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 06:21:48,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409841854] [2020-08-22 06:21:48,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:21:48,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 06:21:48,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053952115] [2020-08-22 06:21:48,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:21:48,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:21:48,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:21:48,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:21:48,114 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-22 06:21:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:21:49,788 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-22 06:21:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 06:21:49,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2020-08-22 06:21:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:21:49,800 INFO L225 Difference]: With dead ends: 3412 [2020-08-22 06:21:49,800 INFO L226 Difference]: Without dead ends: 1900 [2020-08-22 06:21:49,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 06:21:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-22 06:21:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-22 06:21:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-22 06:21:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-22 06:21:49,869 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 219 [2020-08-22 06:21:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:21:49,870 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-22 06:21:49,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:21:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-22 06:21:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-08-22 06:21:49,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:21:49,877 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:21:49,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:21:49,878 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:21:49,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:21:49,878 INFO L82 PathProgramCache]: Analyzing trace with hash -56962879, now seen corresponding path program 1 times [2020-08-22 06:21:49,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:21:49,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635390770] [2020-08-22 06:21:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:21:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:50,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:21:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:50,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:21:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:50,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 06:21:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:50,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-22 06:21:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 193 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 06:21:50,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635390770] [2020-08-22 06:21:50,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:21:50,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 06:21:50,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506445887] [2020-08-22 06:21:50,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:21:50,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:21:50,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:21:50,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:21:50,550 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-22 06:21:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:21:53,945 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-22 06:21:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 06:21:53,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 303 [2020-08-22 06:21:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:21:53,956 INFO L225 Difference]: With dead ends: 3677 [2020-08-22 06:21:53,957 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 06:21:53,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-22 06:21:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 06:21:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-22 06:21:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-22 06:21:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-22 06:21:54,066 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 303 [2020-08-22 06:21:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:21:54,066 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-22 06:21:54,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:21:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-22 06:21:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-08-22 06:21:54,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:21:54,075 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:21:54,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:21:54,076 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:21:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:21:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash -48667167, now seen corresponding path program 1 times [2020-08-22 06:21:54,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:21:54,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478720255] [2020-08-22 06:21:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:21:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:54,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:21:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:54,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:21:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:54,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:21:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:54,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 06:21:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:54,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 06:21:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 438 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-22 06:21:54,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478720255] [2020-08-22 06:21:54,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:21:54,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 06:21:54,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330610420] [2020-08-22 06:21:54,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:21:54,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:21:54,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:21:54,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:21:54,500 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-22 06:21:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:21:59,205 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-22 06:21:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 06:21:59,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 438 [2020-08-22 06:21:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:21:59,223 INFO L225 Difference]: With dead ends: 5238 [2020-08-22 06:21:59,223 INFO L226 Difference]: Without dead ends: 3356 [2020-08-22 06:21:59,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2020-08-22 06:21:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-22 06:21:59,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-22 06:21:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-22 06:21:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-22 06:21:59,305 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 438 [2020-08-22 06:21:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:21:59,306 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-22 06:21:59,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:21:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-22 06:21:59,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-08-22 06:21:59,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:21:59,321 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:21:59,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:21:59,322 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:21:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:21:59,322 INFO L82 PathProgramCache]: Analyzing trace with hash -347726080, now seen corresponding path program 1 times [2020-08-22 06:21:59,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:21:59,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47641285] [2020-08-22 06:21:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:21:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:59,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:21:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:59,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:21:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:59,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:21:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:59,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 06:21:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:59,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 06:21:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:21:59,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-22 06:21:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 668 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-22 06:22:00,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47641285] [2020-08-22 06:22:00,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:22:00,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:22:00,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816683462] [2020-08-22 06:22:00,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:22:00,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:22:00,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:22:00,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:22:00,335 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-22 06:22:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:22:03,463 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-22 06:22:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 06:22:03,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 558 [2020-08-22 06:22:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:22:03,482 INFO L225 Difference]: With dead ends: 5701 [2020-08-22 06:22:03,482 INFO L226 Difference]: Without dead ends: 3400 [2020-08-22 06:22:03,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-08-22 06:22:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-22 06:22:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-22 06:22:03,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-22 06:22:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3495 transitions. [2020-08-22 06:22:03,635 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3495 transitions. Word has length 558 [2020-08-22 06:22:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:22:03,635 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3495 transitions. [2020-08-22 06:22:03,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:22:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3495 transitions. [2020-08-22 06:22:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-08-22 06:22:03,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:22:03,661 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:22:03,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 06:22:03,661 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:22:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:22:03,662 INFO L82 PathProgramCache]: Analyzing trace with hash -229639858, now seen corresponding path program 1 times [2020-08-22 06:22:03,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:22:03,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844981823] [2020-08-22 06:22:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:22:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:03,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:22:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:03,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:22:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:03,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:22:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:03,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 06:22:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:04,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-22 06:22:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 439 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-22 06:22:04,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844981823] [2020-08-22 06:22:04,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:22:04,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:22:04,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76587123] [2020-08-22 06:22:04,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:22:04,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:22:04,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:22:04,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:22:04,777 INFO L87 Difference]: Start difference. First operand 3174 states and 3495 transitions. Second operand 10 states. [2020-08-22 06:22:06,580 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-08-22 06:22:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:22:07,981 INFO L93 Difference]: Finished difference Result 5994 states and 6643 transitions. [2020-08-22 06:22:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 06:22:07,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 591 [2020-08-22 06:22:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:22:07,996 INFO L225 Difference]: With dead ends: 5994 [2020-08-22 06:22:07,996 INFO L226 Difference]: Without dead ends: 3192 [2020-08-22 06:22:08,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-08-22 06:22:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-22 06:22:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-22 06:22:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-22 06:22:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3486 transitions. [2020-08-22 06:22:08,088 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3486 transitions. Word has length 591 [2020-08-22 06:22:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:22:08,089 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3486 transitions. [2020-08-22 06:22:08,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:22:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3486 transitions. [2020-08-22 06:22:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2020-08-22 06:22:08,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:22:08,101 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:22:08,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 06:22:08,101 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:22:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:22:08,102 INFO L82 PathProgramCache]: Analyzing trace with hash -278736799, now seen corresponding path program 2 times [2020-08-22 06:22:08,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:22:08,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54116035] [2020-08-22 06:22:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:22:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:08,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:22:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:08,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:22:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:08,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:22:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:08,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 06:22:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:08,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-22 06:22:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:08,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-22 06:22:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1384 backedges. 609 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-22 06:22:09,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54116035] [2020-08-22 06:22:09,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:22:09,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 06:22:09,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561163126] [2020-08-22 06:22:09,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:22:09,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:22:09,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:22:09,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:22:09,367 INFO L87 Difference]: Start difference. First operand 3178 states and 3486 transitions. Second operand 9 states. [2020-08-22 06:22:11,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:22:11,900 INFO L93 Difference]: Finished difference Result 6354 states and 6982 transitions. [2020-08-22 06:22:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 06:22:11,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 701 [2020-08-22 06:22:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:22:11,916 INFO L225 Difference]: With dead ends: 6354 [2020-08-22 06:22:11,916 INFO L226 Difference]: Without dead ends: 3364 [2020-08-22 06:22:11,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-22 06:22:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-22 06:22:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-22 06:22:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-22 06:22:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3484 transitions. [2020-08-22 06:22:12,001 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3484 transitions. Word has length 701 [2020-08-22 06:22:12,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:22:12,002 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3484 transitions. [2020-08-22 06:22:12,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:22:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3484 transitions. [2020-08-22 06:22:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-08-22 06:22:12,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:22:12,011 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:22:12,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 06:22:12,011 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:22:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:22:12,012 INFO L82 PathProgramCache]: Analyzing trace with hash -638310518, now seen corresponding path program 1 times [2020-08-22 06:22:12,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:22:12,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140945950] [2020-08-22 06:22:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:22:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:12,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:22:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:12,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:22:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:12,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:22:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:12,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 06:22:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:12,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 06:22:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:12,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-22 06:22:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 616 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-22 06:22:13,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140945950] [2020-08-22 06:22:13,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:22:13,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:22:13,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901119017] [2020-08-22 06:22:13,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:22:13,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:22:13,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:22:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:22:13,363 INFO L87 Difference]: Start difference. First operand 3178 states and 3484 transitions. Second operand 10 states. [2020-08-22 06:22:16,026 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-08-22 06:22:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:22:16,902 INFO L93 Difference]: Finished difference Result 6540 states and 7200 transitions. [2020-08-22 06:22:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 06:22:16,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 708 [2020-08-22 06:22:16,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:22:16,925 INFO L225 Difference]: With dead ends: 6540 [2020-08-22 06:22:16,925 INFO L226 Difference]: Without dead ends: 3552 [2020-08-22 06:22:16,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-22 06:22:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-22 06:22:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-22 06:22:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-22 06:22:17,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3869 transitions. [2020-08-22 06:22:17,009 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3869 transitions. Word has length 708 [2020-08-22 06:22:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:22:17,010 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3869 transitions. [2020-08-22 06:22:17,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:22:17,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3869 transitions. [2020-08-22 06:22:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2020-08-22 06:22:17,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:22:17,021 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:22:17,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 06:22:17,021 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:22:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:22:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1537329314, now seen corresponding path program 1 times [2020-08-22 06:22:17,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:22:17,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205501208] [2020-08-22 06:22:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:22:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:17,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:22:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:17,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:22:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:17,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:22:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:17,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 06:22:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:17,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 06:22:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:17,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-22 06:22:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 763 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-22 06:22:17,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205501208] [2020-08-22 06:22:17,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:22:17,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 06:22:17,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105926803] [2020-08-22 06:22:17,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 06:22:17,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:22:17,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 06:22:17,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:22:17,950 INFO L87 Difference]: Start difference. First operand 3548 states and 3869 transitions. Second operand 7 states. [2020-08-22 06:22:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:22:19,569 INFO L93 Difference]: Finished difference Result 8032 states and 8890 transitions. [2020-08-22 06:22:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:22:19,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 734 [2020-08-22 06:22:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:22:19,603 INFO L225 Difference]: With dead ends: 8032 [2020-08-22 06:22:19,604 INFO L226 Difference]: Without dead ends: 4674 [2020-08-22 06:22:19,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-22 06:22:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-22 06:22:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-22 06:22:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-22 06:22:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4750 transitions. [2020-08-22 06:22:19,713 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4750 transitions. Word has length 734 [2020-08-22 06:22:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:22:19,714 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4750 transitions. [2020-08-22 06:22:19,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 06:22:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4750 transitions. [2020-08-22 06:22:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2020-08-22 06:22:19,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:22:19,726 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:22:19,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 06:22:19,727 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:22:19,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:22:19,727 INFO L82 PathProgramCache]: Analyzing trace with hash -583849898, now seen corresponding path program 1 times [2020-08-22 06:22:19,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:22:19,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434300989] [2020-08-22 06:22:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:22:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:19,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:22:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:19,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:22:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:20,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:22:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:20,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 06:22:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:20,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 06:22:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:20,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-22 06:22:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:20,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-22 06:22:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 327 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-22 06:22:20,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434300989] [2020-08-22 06:22:20,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:22:20,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 06:22:20,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588927495] [2020-08-22 06:22:20,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:22:20,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:22:20,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:22:20,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:22:20,787 INFO L87 Difference]: Start difference. First operand 4292 states and 4750 transitions. Second operand 5 states. [2020-08-22 06:22:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:22:21,992 INFO L93 Difference]: Finished difference Result 4296 states and 4753 transitions. [2020-08-22 06:22:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:22:21,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 789 [2020-08-22 06:22:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:22:22,006 INFO L225 Difference]: With dead ends: 4296 [2020-08-22 06:22:22,006 INFO L226 Difference]: Without dead ends: 4294 [2020-08-22 06:22:22,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:22:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-22 06:22:22,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-22 06:22:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-22 06:22:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-22 06:22:22,098 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 789 [2020-08-22 06:22:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:22:22,099 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-22 06:22:22,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:22:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-22 06:22:22,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-08-22 06:22:22,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:22:22,114 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:22:22,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 06:22:22,114 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:22:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:22:22,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1874704500, now seen corresponding path program 1 times [2020-08-22 06:22:22,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:22:22,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845367375] [2020-08-22 06:22:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:22:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:22,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:22:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:22,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:22:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:22,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:22:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:22,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 06:22:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:22,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 06:22:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:22,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-22 06:22:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:22,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-22 06:22:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:22,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-22 06:22:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 382 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-22 06:22:23,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845367375] [2020-08-22 06:22:23,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:22:23,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 06:22:23,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931605962] [2020-08-22 06:22:23,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:22:23,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:22:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:22:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:22:23,221 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-22 06:22:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:22:24,439 INFO L93 Difference]: Finished difference Result 9128 states and 10168 transitions. [2020-08-22 06:22:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:22:24,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 834 [2020-08-22 06:22:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:22:24,455 INFO L225 Difference]: With dead ends: 9128 [2020-08-22 06:22:24,455 INFO L226 Difference]: Without dead ends: 5026 [2020-08-22 06:22:24,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:22:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2020-08-22 06:22:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3918. [2020-08-22 06:22:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3918 states. [2020-08-22 06:22:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 4287 transitions. [2020-08-22 06:22:24,549 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 4287 transitions. Word has length 834 [2020-08-22 06:22:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:22:24,550 INFO L479 AbstractCegarLoop]: Abstraction has 3918 states and 4287 transitions. [2020-08-22 06:22:24,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:22:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 4287 transitions. [2020-08-22 06:22:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-08-22 06:22:24,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:22:24,568 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:22:24,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 06:22:24,569 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:22:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:22:24,569 INFO L82 PathProgramCache]: Analyzing trace with hash -177347705, now seen corresponding path program 1 times [2020-08-22 06:22:24,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:22:24,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170850978] [2020-08-22 06:22:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:22:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:24,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:22:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:24,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 06:22:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:24,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:22:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:24,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 06:22:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:24,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 06:22:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:25,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-22 06:22:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:25,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-22 06:22:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:25,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-22 06:22:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:22:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 379 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-22 06:22:25,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170850978] [2020-08-22 06:22:25,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:22:25,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 06:22:25,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640127509] [2020-08-22 06:22:25,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:22:25,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:22:25,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:22:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:22:25,754 INFO L87 Difference]: Start difference. First operand 3918 states and 4287 transitions. Second operand 8 states. [2020-08-22 06:22:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:22:28,912 INFO L93 Difference]: Finished difference Result 5032 states and 5532 transitions. [2020-08-22 06:22:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 06:22:28,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 845 [2020-08-22 06:22:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:22:28,916 INFO L225 Difference]: With dead ends: 5032 [2020-08-22 06:22:28,916 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 06:22:28,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-08-22 06:22:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 06:22:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 06:22:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 06:22:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 06:22:28,930 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 845 [2020-08-22 06:22:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:22:28,931 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 06:22:28,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:22:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 06:22:28,932 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 06:22:28,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 06:22:28,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 06:22:29,647 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-22 06:22:29,928 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177