/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:40:55,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:40:55,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:40:55,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 00:40:55,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:40:55,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:40:55,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:40:55,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:40:55,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:40:55,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:40:55,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:40:55,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:40:55,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:40:55,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:40:55,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:40:55,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:40:55,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 00:40:55,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:40:55,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:40:55,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:40:55,562 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 00:40:55,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:40:55,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:40:55,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:40:55,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:40:55,601 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:40:55,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:40:55,601 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:40:55,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:40:55,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:40:55,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:40:55,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:40:55,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:40:55,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:40:55,604 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:40:55,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:40:55,604 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:40:55,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:40:55,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:40:55,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:40:55,605 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:40:55,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:40:55,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:40:55,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:40:55,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:40:55,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:40:55,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:40:55,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:40:55,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:40:55,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:40:55,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 00:40:55,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:40:55,916 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:40:55,920 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:40:55,921 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:40:55,922 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:40:55,923 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-22 00:40:56,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbc4d9e4a/4227b8cded7647448f9af01b31c4d066/FLAG1b23a063a [2020-08-22 00:40:56,636 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:40:56,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-22 00:40:56,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbc4d9e4a/4227b8cded7647448f9af01b31c4d066/FLAG1b23a063a [2020-08-22 00:40:56,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbc4d9e4a/4227b8cded7647448f9af01b31c4d066 [2020-08-22 00:40:56,932 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:40:56,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:40:56,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:40:56,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:40:56,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:40:56,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:40:56" (1/1) ... [2020-08-22 00:40:56,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2c32e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:56, skipping insertion in model container [2020-08-22 00:40:56,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:40:56" (1/1) ... [2020-08-22 00:40:56,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:40:57,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:40:57,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:40:57,584 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:40:57,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:40:57,742 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:40:57,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:57 WrapperNode [2020-08-22 00:40:57,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:40:57,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:40:57,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:40:57,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:40:57,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:57" (1/1) ... [2020-08-22 00:40:57,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:57" (1/1) ... [2020-08-22 00:40:57,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:57" (1/1) ... [2020-08-22 00:40:57,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:57" (1/1) ... [2020-08-22 00:40:57,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:57" (1/1) ... [2020-08-22 00:40:57,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:57" (1/1) ... [2020-08-22 00:40:57,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:57" (1/1) ... [2020-08-22 00:40:57,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:40:57,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:40:57,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:40:57,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:40:57,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:57" (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 00:40:57,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:40:57,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:40:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-22 00:40:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:40:57,955 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-22 00:40:57,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:40:57,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 00:40:57,956 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 00:40:57,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:40:57,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:40:57,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:40:59,353 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:40:59,353 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 00:40:59,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:40:59 BoogieIcfgContainer [2020-08-22 00:40:59,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:40:59,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:40:59,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:40:59,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:40:59,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:40:56" (1/3) ... [2020-08-22 00:40:59,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5092e16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:40:59, skipping insertion in model container [2020-08-22 00:40:59,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:40:57" (2/3) ... [2020-08-22 00:40:59,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5092e16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:40:59, skipping insertion in model container [2020-08-22 00:40:59,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:40:59" (3/3) ... [2020-08-22 00:40:59,372 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-22 00:40:59,385 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:40:59,394 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:40:59,413 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:40:59,442 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:40:59,442 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:40:59,442 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:40:59,443 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:40:59,443 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:40:59,443 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:40:59,443 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:40:59,444 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:40:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-22 00:40:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 00:40:59,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:40:59,478 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] [2020-08-22 00:40:59,479 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:40:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:40:59,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-22 00:40:59,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:40:59,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443368924] [2020-08-22 00:40:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:40:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:40:59,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:40:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:40:59,928 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 00:40:59,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443368924] [2020-08-22 00:40:59,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:40:59,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:40:59,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244707937] [2020-08-22 00:40:59,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:40:59,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:40:59,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:40:59,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:40:59,961 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-22 00:41:02,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:02,623 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-22 00:41:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 00:41:02,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-22 00:41:02,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:02,657 INFO L225 Difference]: With dead ends: 886 [2020-08-22 00:41:02,657 INFO L226 Difference]: Without dead ends: 564 [2020-08-22 00:41:02,666 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 00:41:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-22 00:41:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-22 00:41:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-22 00:41:02,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-22 00:41:02,768 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-22 00:41:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:02,769 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-22 00:41:02,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:41:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-22 00:41:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 00:41:02,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:02,776 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:02,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:41:02,776 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-22 00:41:02,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:02,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645994524] [2020-08-22 00:41:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:02,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:03,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:41:03,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645994524] [2020-08-22 00:41:03,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:41:03,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 00:41:03,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113088571] [2020-08-22 00:41:03,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:41:03,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:03,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:41:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:41:03,161 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-22 00:41:05,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:05,116 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-22 00:41:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:41:05,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-22 00:41:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:05,124 INFO L225 Difference]: With dead ends: 1320 [2020-08-22 00:41:05,124 INFO L226 Difference]: Without dead ends: 768 [2020-08-22 00:41:05,127 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 00:41:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-22 00:41:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-22 00:41:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-22 00:41:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-22 00:41:05,165 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-22 00:41:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:05,166 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-22 00:41:05,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:41:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-22 00:41:05,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-22 00:41:05,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:05,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:05,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:41:05,173 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:05,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:05,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-22 00:41:05,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:05,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457743967] [2020-08-22 00:41:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:05,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:05,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:41:05,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457743967] [2020-08-22 00:41:05,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:41:05,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 00:41:05,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957885904] [2020-08-22 00:41:05,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:41:05,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:05,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:41:05,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:41:05,616 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-22 00:41:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:07,503 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-22 00:41:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 00:41:07,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-22 00:41:07,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:07,509 INFO L225 Difference]: With dead ends: 1330 [2020-08-22 00:41:07,510 INFO L226 Difference]: Without dead ends: 770 [2020-08-22 00:41:07,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 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 00:41:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-22 00:41:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-22 00:41:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-22 00:41:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-22 00:41:07,544 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-22 00:41:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:07,544 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-22 00:41:07,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:41:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-22 00:41:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-22 00:41:07,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:07,551 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, 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] [2020-08-22 00:41:07,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:41:07,551 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:07,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:07,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-22 00:41:07,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:07,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019790726] [2020-08-22 00:41:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:07,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:07,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:07,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 00:41:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-22 00:41:07,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019790726] [2020-08-22 00:41:07,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:07,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 00:41:07,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887264198] [2020-08-22 00:41:07,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:41:07,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:41:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:41:07,844 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-22 00:41:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:09,597 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-22 00:41:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:41:09,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-22 00:41:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:09,610 INFO L225 Difference]: With dead ends: 2246 [2020-08-22 00:41:09,610 INFO L226 Difference]: Without dead ends: 1498 [2020-08-22 00:41:09,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 00:41:09,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-22 00:41:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-22 00:41:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-22 00:41:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-22 00:41:09,668 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-22 00:41:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:09,669 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-22 00:41:09,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:41:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-22 00:41:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-22 00:41:09,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:09,675 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:09,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:41:09,676 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:09,677 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-22 00:41:09,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:09,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94385147] [2020-08-22 00:41:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:09,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:09,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:09,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 00:41:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:10,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 00:41:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 00:41:10,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94385147] [2020-08-22 00:41:10,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:10,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:41:10,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375340254] [2020-08-22 00:41:10,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:41:10,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:10,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:41:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:41:10,338 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-22 00:41:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:12,913 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-22 00:41:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 00:41:12,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-22 00:41:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:12,922 INFO L225 Difference]: With dead ends: 3081 [2020-08-22 00:41:12,922 INFO L226 Difference]: Without dead ends: 1734 [2020-08-22 00:41:12,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-22 00:41:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-22 00:41:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-22 00:41:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-22 00:41:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-22 00:41:12,977 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-22 00:41:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:12,977 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-22 00:41:12,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:41:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-22 00:41:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-22 00:41:12,984 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:12,984 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, 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, 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] [2020-08-22 00:41:12,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:41:12,985 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:12,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-22 00:41:12,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:12,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677982025] [2020-08-22 00:41:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:13,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:13,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:13,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 00:41:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:13,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-22 00:41:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-22 00:41:13,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677982025] [2020-08-22 00:41:13,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:13,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 00:41:13,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257816746] [2020-08-22 00:41:13,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:41:13,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:13,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:41:13,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:41:13,741 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-22 00:41:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:15,986 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-22 00:41:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:41:15,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-22 00:41:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:15,997 INFO L225 Difference]: With dead ends: 3607 [2020-08-22 00:41:15,998 INFO L226 Difference]: Without dead ends: 1923 [2020-08-22 00:41:16,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:41:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-22 00:41:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-22 00:41:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-22 00:41:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-22 00:41:16,092 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-22 00:41:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:16,093 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-22 00:41:16,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:41:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-22 00:41:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-22 00:41:16,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:16,100 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, 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, 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] [2020-08-22 00:41:16,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:41:16,101 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-22 00:41:16,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:16,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2890989] [2020-08-22 00:41:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:16,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:16,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:16,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 00:41:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:16,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-22 00:41:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-22 00:41:16,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2890989] [2020-08-22 00:41:16,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:16,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:41:16,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817078891] [2020-08-22 00:41:16,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:41:16,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:16,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:41:16,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:41:16,741 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-22 00:41:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:20,455 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-22 00:41:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 00:41:20,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-22 00:41:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:20,471 INFO L225 Difference]: With dead ends: 5807 [2020-08-22 00:41:20,471 INFO L226 Difference]: Without dead ends: 3550 [2020-08-22 00:41:20,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-08-22 00:41:20,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-22 00:41:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-22 00:41:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-22 00:41:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-22 00:41:20,613 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-22 00:41:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:20,613 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-22 00:41:20,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:41:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-22 00:41:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-22 00:41:20,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:20,630 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:20,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 00:41:20,630 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-22 00:41:20,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:20,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578283462] [2020-08-22 00:41:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:20,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:20,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:20,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 00:41:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:20,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 00:41:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:20,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-22 00:41:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:21,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-22 00:41:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-08-22 00:41:21,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578283462] [2020-08-22 00:41:21,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:21,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 00:41:21,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156143022] [2020-08-22 00:41:21,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:41:21,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:41:21,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:41:21,473 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-22 00:41:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:23,030 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-22 00:41:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:41:23,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-22 00:41:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:23,051 INFO L225 Difference]: With dead ends: 6928 [2020-08-22 00:41:23,051 INFO L226 Difference]: Without dead ends: 3938 [2020-08-22 00:41:23,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 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 00:41:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-22 00:41:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-22 00:41:23,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-22 00:41:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-22 00:41:23,196 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-22 00:41:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:23,197 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-22 00:41:23,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:41:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-22 00:41:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-22 00:41:23,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:23,227 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, 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, 3, 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] [2020-08-22 00:41:23,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 00:41:23,227 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-22 00:41:23,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:23,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476335159] [2020-08-22 00:41:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:23,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:23,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:23,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 00:41:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:23,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 00:41:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:23,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 00:41:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:23,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-22 00:41:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-08-22 00:41:24,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476335159] [2020-08-22 00:41:24,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:24,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 00:41:24,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024352519] [2020-08-22 00:41:24,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:41:24,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:24,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:41:24,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:41:24,065 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-22 00:41:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:25,740 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-22 00:41:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:41:25,741 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-22 00:41:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:25,759 INFO L225 Difference]: With dead ends: 8034 [2020-08-22 00:41:25,760 INFO L226 Difference]: Without dead ends: 4484 [2020-08-22 00:41:25,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 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 00:41:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-22 00:41:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-22 00:41:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-22 00:41:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-22 00:41:25,897 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-22 00:41:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:25,899 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-22 00:41:25,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:41:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-22 00:41:25,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-22 00:41:25,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:25,924 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, 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, 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, 3, 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] [2020-08-22 00:41:25,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 00:41:25,924 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:25,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-22 00:41:25,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:25,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198881497] [2020-08-22 00:41:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:26,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:26,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:26,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 00:41:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:26,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 00:41:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:26,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-22 00:41:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:26,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-22 00:41:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:26,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-22 00:41:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:26,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-22 00:41:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-08-22 00:41:27,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198881497] [2020-08-22 00:41:27,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:27,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 00:41:27,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257189210] [2020-08-22 00:41:27,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:41:27,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:27,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:41:27,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:41:27,462 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-22 00:41:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:29,371 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-22 00:41:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:41:29,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-22 00:41:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:29,388 INFO L225 Difference]: With dead ends: 8817 [2020-08-22 00:41:29,388 INFO L226 Difference]: Without dead ends: 4494 [2020-08-22 00:41:29,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:41:29,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-22 00:41:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-22 00:41:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-22 00:41:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-22 00:41:29,495 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-22 00:41:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:29,495 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-22 00:41:29,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:41:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-22 00:41:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-22 00:41:29,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:29,517 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, 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, 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, 1] [2020-08-22 00:41:29,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 00:41:29,517 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:29,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-22 00:41:29,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:29,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513815137] [2020-08-22 00:41:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:29,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:29,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:29,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 00:41:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:29,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 00:41:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:29,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 00:41:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:29,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-22 00:41:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:30,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-22 00:41:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-08-22 00:41:30,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513815137] [2020-08-22 00:41:30,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:30,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 00:41:30,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089039351] [2020-08-22 00:41:30,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:41:30,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:30,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:41:30,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:41:30,686 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-22 00:41:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:32,148 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-22 00:41:32,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:41:32,155 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-22 00:41:32,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:32,187 INFO L225 Difference]: With dead ends: 9674 [2020-08-22 00:41:32,187 INFO L226 Difference]: Without dead ends: 5398 [2020-08-22 00:41:32,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 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 00:41:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-22 00:41:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-22 00:41:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-22 00:41:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-22 00:41:32,300 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-22 00:41:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:32,302 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-22 00:41:32,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:41:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-22 00:41:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-22 00:41:32,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:32,320 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, 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, 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, 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 00:41:32,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 00:41:32,321 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:32,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-22 00:41:32,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:32,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648062846] [2020-08-22 00:41:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:32,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:32,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:32,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 00:41:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:32,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 00:41:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:32,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-22 00:41:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:32,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-22 00:41:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:32,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-22 00:41:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:33,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-22 00:41:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-08-22 00:41:33,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648062846] [2020-08-22 00:41:33,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:33,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:41:33,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460912445] [2020-08-22 00:41:33,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:41:33,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:33,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:41:33,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:41:33,938 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-22 00:41:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:36,768 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-22 00:41:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 00:41:36,769 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-22 00:41:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:36,785 INFO L225 Difference]: With dead ends: 11142 [2020-08-22 00:41:36,786 INFO L226 Difference]: Without dead ends: 6124 [2020-08-22 00:41:36,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-22 00:41:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-22 00:41:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-22 00:41:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-22 00:41:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-22 00:41:36,902 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-22 00:41:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:36,903 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-22 00:41:36,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:41:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-22 00:41:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-22 00:41:36,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:36,922 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, 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, 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, 1, 1] [2020-08-22 00:41:36,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 00:41:36,923 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:36,923 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-22 00:41:36,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:36,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364190115] [2020-08-22 00:41:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:37,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:37,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:37,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 00:41:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:37,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 00:41:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:37,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 00:41:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:37,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-22 00:41:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:37,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 00:41:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:37,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-22 00:41:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-08-22 00:41:38,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364190115] [2020-08-22 00:41:38,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:38,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 00:41:38,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883128376] [2020-08-22 00:41:38,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:41:38,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:38,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:41:38,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:41:38,423 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-22 00:41:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:42,052 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-22 00:41:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 00:41:42,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-22 00:41:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:42,071 INFO L225 Difference]: With dead ends: 11324 [2020-08-22 00:41:42,071 INFO L226 Difference]: Without dead ends: 5758 [2020-08-22 00:41:42,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-22 00:41:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-22 00:41:42,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-22 00:41:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-22 00:41:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-22 00:41:42,185 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-22 00:41:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:42,186 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-22 00:41:42,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:41:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-22 00:41:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-22 00:41:42,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:42,206 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, 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, 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, 1, 1] [2020-08-22 00:41:42,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 00:41:42,207 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:42,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-22 00:41:42,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:42,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291979653] [2020-08-22 00:41:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:42,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:42,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:42,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 00:41:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:42,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 00:41:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:42,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 00:41:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:42,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-22 00:41:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:42,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-22 00:41:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:42,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-22 00:41:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-08-22 00:41:43,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291979653] [2020-08-22 00:41:43,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:43,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:41:43,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626833490] [2020-08-22 00:41:43,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:41:43,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:41:43,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:41:43,422 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-22 00:41:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:41:46,808 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-22 00:41:46,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 00:41:46,809 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-22 00:41:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:41:46,830 INFO L225 Difference]: With dead ends: 13170 [2020-08-22 00:41:46,831 INFO L226 Difference]: Without dead ends: 7602 [2020-08-22 00:41:46,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-08-22 00:41:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-22 00:41:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-22 00:41:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-22 00:41:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-22 00:41:47,024 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-22 00:41:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:41:47,026 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-22 00:41:47,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:41:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-22 00:41:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-22 00:41:47,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:41:47,073 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 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, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-08-22 00:41:47,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 00:41:47,074 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:41:47,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:41:47,075 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-22 00:41:47,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:41:47,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818428088] [2020-08-22 00:41:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:41:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:47,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:41:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:47,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 00:41:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:47,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 00:41:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-22 00:41:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:47,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 00:41:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:47,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-22 00:41:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:47,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-22 00:41:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:47,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-22 00:41:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:47,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-22 00:41:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:47,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-22 00:41:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:41:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 1325 proven. 395 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-22 00:41:48,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818428088] [2020-08-22 00:41:48,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:41:48,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:41:48,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061570938] [2020-08-22 00:41:48,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:41:48,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:41:48,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:41:48,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:41:48,941 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states.