/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:56:01,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:56:01,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:56:01,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:56:01,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:56:01,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:56:01,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:56:01,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:56:01,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:56:01,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:56:01,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:56:01,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:56:01,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:56:01,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:56:01,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:56:01,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:56:01,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:56:01,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:56:01,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:56:01,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:56:01,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:56:01,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:56:01,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:56:01,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:56:01,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:56:01,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:56:01,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:56:01,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:56:01,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:56:01,741 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:56:01,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:56:01,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:56:01,743 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:56:01,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:56:01,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:56:01,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:56:01,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:56:01,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:56:01,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:56:01,746 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:56:01,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:56:01,747 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:56:01,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:56:01,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:56:01,749 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:56:01,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:56:01,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:56:01,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:56:01,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:56:01,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:56:01,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:56:01,751 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-07-17 17:56:02,052 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:56:02,065 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:56:02,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:56:02,070 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:56:02,071 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:56:02,071 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-07-17 17:56:02,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5aa6423d/f1705fc049e749e2ad7efca05f79bacc/FLAGbbe187d4d [2020-07-17 17:56:02,717 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:56:02,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-07-17 17:56:02,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5aa6423d/f1705fc049e749e2ad7efca05f79bacc/FLAGbbe187d4d [2020-07-17 17:56:03,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5aa6423d/f1705fc049e749e2ad7efca05f79bacc [2020-07-17 17:56:03,036 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:56:03,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:56:03,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:56:03,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:56:03,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:56:03,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:56:03" (1/1) ... [2020-07-17 17:56:03,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38133dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03, skipping insertion in model container [2020-07-17 17:56:03,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:56:03" (1/1) ... [2020-07-17 17:56:03,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:56:03,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:56:03,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:56:03,671 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:56:03,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:56:03,826 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:56:03,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03 WrapperNode [2020-07-17 17:56:03,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:56:03,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:56:03,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:56:03,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:56:03,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03" (1/1) ... [2020-07-17 17:56:03,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03" (1/1) ... [2020-07-17 17:56:03,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03" (1/1) ... [2020-07-17 17:56:03,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03" (1/1) ... [2020-07-17 17:56:03,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03" (1/1) ... [2020-07-17 17:56:03,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03" (1/1) ... [2020-07-17 17:56:03,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03" (1/1) ... [2020-07-17 17:56:04,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:56:04,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:56:04,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:56:04,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:56:04,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 17:56:04,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:56:04,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:56:04,125 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-17 17:56:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:56:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-17 17:56:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:56:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:56:04,127 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-17 17:56:04,127 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:56:04,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:56:04,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:56:05,842 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:56:05,843 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 17:56:05,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:56:05 BoogieIcfgContainer [2020-07-17 17:56:05,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:56:05,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:56:05,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:56:05,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:56:05,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:56:03" (1/3) ... [2020-07-17 17:56:05,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1daef1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:56:05, skipping insertion in model container [2020-07-17 17:56:05,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:56:03" (2/3) ... [2020-07-17 17:56:05,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1daef1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:56:05, skipping insertion in model container [2020-07-17 17:56:05,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:56:05" (3/3) ... [2020-07-17 17:56:05,865 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-07-17 17:56:05,877 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:56:05,887 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:56:05,902 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:56:05,927 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:56:05,927 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:56:05,927 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:56:05,928 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:56:05,928 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:56:05,928 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:56:05,928 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:56:05,928 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:56:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states. [2020-07-17 17:56:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-17 17:56:05,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:05,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:56:05,969 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:05,977 INFO L82 PathProgramCache]: Analyzing trace with hash -444760420, now seen corresponding path program 1 times [2020-07-17 17:56:05,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:05,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774124358] [2020-07-17 17:56:05,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:56:06,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774124358] [2020-07-17 17:56:06,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:56:06,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:56:06,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118585377] [2020-07-17 17:56:06,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:56:06,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:56:06,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:56:06,438 INFO L87 Difference]: Start difference. First operand 678 states. Second operand 5 states. [2020-07-17 17:56:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:09,422 INFO L93 Difference]: Finished difference Result 1691 states and 2234 transitions. [2020-07-17 17:56:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:56:09,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-07-17 17:56:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:09,451 INFO L225 Difference]: With dead ends: 1691 [2020-07-17 17:56:09,451 INFO L226 Difference]: Without dead ends: 955 [2020-07-17 17:56:09,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:56:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-07-17 17:56:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 804. [2020-07-17 17:56:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 804 states. [2020-07-17 17:56:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1034 transitions. [2020-07-17 17:56:09,653 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1034 transitions. Word has length 60 [2020-07-17 17:56:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:09,654 INFO L479 AbstractCegarLoop]: Abstraction has 804 states and 1034 transitions. [2020-07-17 17:56:09,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:56:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1034 transitions. [2020-07-17 17:56:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-17 17:56:09,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:09,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:56:09,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:56:09,664 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1537556143, now seen corresponding path program 1 times [2020-07-17 17:56:09,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:09,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359865138] [2020-07-17 17:56:09,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:56:09,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359865138] [2020-07-17 17:56:09,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:56:09,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 17:56:09,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716546495] [2020-07-17 17:56:09,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:56:09,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:09,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:56:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:56:09,958 INFO L87 Difference]: Start difference. First operand 804 states and 1034 transitions. Second operand 8 states. [2020-07-17 17:56:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:13,592 INFO L93 Difference]: Finished difference Result 2249 states and 2960 transitions. [2020-07-17 17:56:13,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 17:56:13,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 139 [2020-07-17 17:56:13,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:13,606 INFO L225 Difference]: With dead ends: 2249 [2020-07-17 17:56:13,606 INFO L226 Difference]: Without dead ends: 1460 [2020-07-17 17:56:13,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:56:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-07-17 17:56:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1192. [2020-07-17 17:56:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-07-17 17:56:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1558 transitions. [2020-07-17 17:56:13,742 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1558 transitions. Word has length 139 [2020-07-17 17:56:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:13,746 INFO L479 AbstractCegarLoop]: Abstraction has 1192 states and 1558 transitions. [2020-07-17 17:56:13,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:56:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1558 transitions. [2020-07-17 17:56:13,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-17 17:56:13,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:13,761 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:56:13,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:56:13,762 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:13,764 INFO L82 PathProgramCache]: Analyzing trace with hash -681557324, now seen corresponding path program 1 times [2020-07-17 17:56:13,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:13,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392439889] [2020-07-17 17:56:13,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:56:14,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392439889] [2020-07-17 17:56:14,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:56:14,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 17:56:14,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132539671] [2020-07-17 17:56:14,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:56:14,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:14,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:56:14,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:56:14,021 INFO L87 Difference]: Start difference. First operand 1192 states and 1558 transitions. Second operand 8 states. [2020-07-17 17:56:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:17,767 INFO L93 Difference]: Finished difference Result 3243 states and 4499 transitions. [2020-07-17 17:56:17,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:56:17,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 139 [2020-07-17 17:56:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:17,795 INFO L225 Difference]: With dead ends: 3243 [2020-07-17 17:56:17,796 INFO L226 Difference]: Without dead ends: 2066 [2020-07-17 17:56:17,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-07-17 17:56:17,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2020-07-17 17:56:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1978. [2020-07-17 17:56:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2020-07-17 17:56:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2604 transitions. [2020-07-17 17:56:18,048 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2604 transitions. Word has length 139 [2020-07-17 17:56:18,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:18,049 INFO L479 AbstractCegarLoop]: Abstraction has 1978 states and 2604 transitions. [2020-07-17 17:56:18,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:56:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2604 transitions. [2020-07-17 17:56:18,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-17 17:56:18,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:18,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:56:18,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:56:18,052 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:18,053 INFO L82 PathProgramCache]: Analyzing trace with hash 791250278, now seen corresponding path program 1 times [2020-07-17 17:56:18,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:18,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202985565] [2020-07-17 17:56:18,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:56:18,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202985565] [2020-07-17 17:56:18,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:56:18,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 17:56:18,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292354892] [2020-07-17 17:56:18,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:56:18,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:18,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:56:18,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:56:18,267 INFO L87 Difference]: Start difference. First operand 1978 states and 2604 transitions. Second operand 7 states. [2020-07-17 17:56:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:21,190 INFO L93 Difference]: Finished difference Result 4827 states and 6442 transitions. [2020-07-17 17:56:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:56:21,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2020-07-17 17:56:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:21,218 INFO L225 Difference]: With dead ends: 4827 [2020-07-17 17:56:21,218 INFO L226 Difference]: Without dead ends: 2864 [2020-07-17 17:56:21,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:56:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2020-07-17 17:56:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2430. [2020-07-17 17:56:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2430 states. [2020-07-17 17:56:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 3154 transitions. [2020-07-17 17:56:21,647 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 3154 transitions. Word has length 142 [2020-07-17 17:56:21,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:21,649 INFO L479 AbstractCegarLoop]: Abstraction has 2430 states and 3154 transitions. [2020-07-17 17:56:21,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:56:21,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 3154 transitions. [2020-07-17 17:56:21,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-07-17 17:56:21,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:21,653 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:56:21,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:56:21,653 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash 355901312, now seen corresponding path program 1 times [2020-07-17 17:56:21,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:21,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249560479] [2020-07-17 17:56:21,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:56:22,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249560479] [2020-07-17 17:56:22,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:56:22,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 17:56:22,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196292193] [2020-07-17 17:56:22,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:56:22,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:22,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:56:22,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:56:22,041 INFO L87 Difference]: Start difference. First operand 2430 states and 3154 transitions. Second operand 9 states. [2020-07-17 17:56:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:25,858 INFO L93 Difference]: Finished difference Result 5546 states and 7186 transitions. [2020-07-17 17:56:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 17:56:25,859 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 166 [2020-07-17 17:56:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:25,886 INFO L225 Difference]: With dead ends: 5546 [2020-07-17 17:56:25,887 INFO L226 Difference]: Without dead ends: 3131 [2020-07-17 17:56:25,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-07-17 17:56:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2020-07-17 17:56:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3059. [2020-07-17 17:56:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-07-17 17:56:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 3860 transitions. [2020-07-17 17:56:26,182 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 3860 transitions. Word has length 166 [2020-07-17 17:56:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:26,183 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 3860 transitions. [2020-07-17 17:56:26,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:56:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 3860 transitions. [2020-07-17 17:56:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-07-17 17:56:26,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:26,190 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:56:26,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:56:26,191 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:26,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:26,191 INFO L82 PathProgramCache]: Analyzing trace with hash -832039479, now seen corresponding path program 1 times [2020-07-17 17:56:26,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:26,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697665724] [2020-07-17 17:56:26,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 88 proven. 67 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-17 17:56:26,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697665724] [2020-07-17 17:56:26,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:26,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:56:26,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584304237] [2020-07-17 17:56:26,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:56:26,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:26,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:56:26,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:56:26,898 INFO L87 Difference]: Start difference. First operand 3059 states and 3860 transitions. Second operand 9 states. [2020-07-17 17:56:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:31,095 INFO L93 Difference]: Finished difference Result 7201 states and 8966 transitions. [2020-07-17 17:56:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 17:56:31,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 285 [2020-07-17 17:56:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:31,127 INFO L225 Difference]: With dead ends: 7201 [2020-07-17 17:56:31,128 INFO L226 Difference]: Without dead ends: 4157 [2020-07-17 17:56:31,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-07-17 17:56:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2020-07-17 17:56:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 4088. [2020-07-17 17:56:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4088 states. [2020-07-17 17:56:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 4970 transitions. [2020-07-17 17:56:31,671 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 4970 transitions. Word has length 285 [2020-07-17 17:56:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:31,675 INFO L479 AbstractCegarLoop]: Abstraction has 4088 states and 4970 transitions. [2020-07-17 17:56:31,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:56:31,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 4970 transitions. [2020-07-17 17:56:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-07-17 17:56:31,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:31,683 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:56:31,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:56:31,692 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:31,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:31,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1050709208, now seen corresponding path program 1 times [2020-07-17 17:56:31,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:31,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942425406] [2020-07-17 17:56:31,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 139 proven. 3 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-07-17 17:56:32,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942425406] [2020-07-17 17:56:32,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:32,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-17 17:56:32,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125764632] [2020-07-17 17:56:32,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:56:32,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:56:32,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:56:32,139 INFO L87 Difference]: Start difference. First operand 4088 states and 4970 transitions. Second operand 5 states. [2020-07-17 17:56:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:34,848 INFO L93 Difference]: Finished difference Result 8604 states and 10594 transitions. [2020-07-17 17:56:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:56:34,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 378 [2020-07-17 17:56:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:34,981 INFO L225 Difference]: With dead ends: 8604 [2020-07-17 17:56:34,982 INFO L226 Difference]: Without dead ends: 3915 [2020-07-17 17:56:34,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:56:34,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2020-07-17 17:56:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 2565. [2020-07-17 17:56:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2565 states. [2020-07-17 17:56:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 3230 transitions. [2020-07-17 17:56:35,201 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 3230 transitions. Word has length 378 [2020-07-17 17:56:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:35,202 INFO L479 AbstractCegarLoop]: Abstraction has 2565 states and 3230 transitions. [2020-07-17 17:56:35,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:56:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 3230 transitions. [2020-07-17 17:56:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-17 17:56:35,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:35,211 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-07-17 17:56:35,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:56:35,211 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:35,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:35,212 INFO L82 PathProgramCache]: Analyzing trace with hash 525005042, now seen corresponding path program 1 times [2020-07-17 17:56:35,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:35,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199553525] [2020-07-17 17:56:35,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 132 proven. 24 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-07-17 17:56:35,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199553525] [2020-07-17 17:56:35,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:35,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:56:35,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458306590] [2020-07-17 17:56:35,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:56:35,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:35,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:56:35,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:56:35,639 INFO L87 Difference]: Start difference. First operand 2565 states and 3230 transitions. Second operand 7 states. [2020-07-17 17:56:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:39,309 INFO L93 Difference]: Finished difference Result 3356 states and 4248 transitions. [2020-07-17 17:56:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:56:39,310 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 402 [2020-07-17 17:56:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:39,328 INFO L225 Difference]: With dead ends: 3356 [2020-07-17 17:56:39,328 INFO L226 Difference]: Without dead ends: 3354 [2020-07-17 17:56:39,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-07-17 17:56:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2020-07-17 17:56:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 2374. [2020-07-17 17:56:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2020-07-17 17:56:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 2948 transitions. [2020-07-17 17:56:39,590 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 2948 transitions. Word has length 402 [2020-07-17 17:56:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:39,591 INFO L479 AbstractCegarLoop]: Abstraction has 2374 states and 2948 transitions. [2020-07-17 17:56:39,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:56:39,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 2948 transitions. [2020-07-17 17:56:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-17 17:56:39,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:39,599 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-07-17 17:56:39,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:56:39,599 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:39,600 INFO L82 PathProgramCache]: Analyzing trace with hash -812819948, now seen corresponding path program 1 times [2020-07-17 17:56:39,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:39,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662536129] [2020-07-17 17:56:39,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 519 proven. 160 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-17 17:56:40,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662536129] [2020-07-17 17:56:40,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:40,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:56:40,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295969437] [2020-07-17 17:56:40,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:56:40,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:40,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:56:40,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:56:40,550 INFO L87 Difference]: Start difference. First operand 2374 states and 2948 transitions. Second operand 12 states. [2020-07-17 17:56:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:49,232 INFO L93 Difference]: Finished difference Result 6083 states and 7819 transitions. [2020-07-17 17:56:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-17 17:56:49,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 503 [2020-07-17 17:56:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:49,256 INFO L225 Difference]: With dead ends: 6083 [2020-07-17 17:56:49,256 INFO L226 Difference]: Without dead ends: 4106 [2020-07-17 17:56:49,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=579, Invalid=2501, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 17:56:49,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-07-17 17:56:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 3742. [2020-07-17 17:56:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3742 states. [2020-07-17 17:56:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 4671 transitions. [2020-07-17 17:56:49,762 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 4671 transitions. Word has length 503 [2020-07-17 17:56:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:49,763 INFO L479 AbstractCegarLoop]: Abstraction has 3742 states and 4671 transitions. [2020-07-17 17:56:49,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:56:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 4671 transitions. [2020-07-17 17:56:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2020-07-17 17:56:49,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:49,775 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:56:49,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:56:49,776 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:49,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:49,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1101951350, now seen corresponding path program 1 times [2020-07-17 17:56:49,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:49,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227291335] [2020-07-17 17:56:49,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 417 proven. 140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-07-17 17:56:50,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227291335] [2020-07-17 17:56:50,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:50,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:56:50,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809386473] [2020-07-17 17:56:50,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:56:50,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:50,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:56:50,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:56:50,676 INFO L87 Difference]: Start difference. First operand 3742 states and 4671 transitions. Second operand 7 states. [2020-07-17 17:56:54,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:54,157 INFO L93 Difference]: Finished difference Result 8997 states and 11604 transitions. [2020-07-17 17:56:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:56:54,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 585 [2020-07-17 17:56:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:54,185 INFO L225 Difference]: With dead ends: 8997 [2020-07-17 17:56:54,185 INFO L226 Difference]: Without dead ends: 5652 [2020-07-17 17:56:54,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:56:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2020-07-17 17:56:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 5615. [2020-07-17 17:56:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5615 states. [2020-07-17 17:56:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5615 states to 5615 states and 7035 transitions. [2020-07-17 17:56:54,778 INFO L78 Accepts]: Start accepts. Automaton has 5615 states and 7035 transitions. Word has length 585 [2020-07-17 17:56:54,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:54,778 INFO L479 AbstractCegarLoop]: Abstraction has 5615 states and 7035 transitions. [2020-07-17 17:56:54,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:56:54,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5615 states and 7035 transitions. [2020-07-17 17:56:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2020-07-17 17:56:54,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:54,792 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:56:54,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:56:54,792 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:54,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1597636922, now seen corresponding path program 1 times [2020-07-17 17:56:54,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:54,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112932569] [2020-07-17 17:56:54,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:55,330 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-17 17:56:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 685 proven. 194 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-07-17 17:56:55,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112932569] [2020-07-17 17:56:55,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:55,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 17:56:55,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096507593] [2020-07-17 17:56:55,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 17:56:55,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:55,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 17:56:55,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-17 17:56:55,898 INFO L87 Difference]: Start difference. First operand 5615 states and 7035 transitions. Second operand 13 states. [2020-07-17 17:57:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:57:01,596 INFO L93 Difference]: Finished difference Result 11988 states and 15032 transitions. [2020-07-17 17:57:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 17:57:01,597 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 590 [2020-07-17 17:57:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:57:01,630 INFO L225 Difference]: With dead ends: 11988 [2020-07-17 17:57:01,630 INFO L226 Difference]: Without dead ends: 6126 [2020-07-17 17:57:01,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2020-07-17 17:57:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2020-07-17 17:57:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 5862. [2020-07-17 17:57:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5862 states. [2020-07-17 17:57:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5862 states to 5862 states and 6837 transitions. [2020-07-17 17:57:02,478 INFO L78 Accepts]: Start accepts. Automaton has 5862 states and 6837 transitions. Word has length 590 [2020-07-17 17:57:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:57:02,479 INFO L479 AbstractCegarLoop]: Abstraction has 5862 states and 6837 transitions. [2020-07-17 17:57:02,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 17:57:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5862 states and 6837 transitions. [2020-07-17 17:57:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2020-07-17 17:57:02,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:57:02,491 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-07-17 17:57:02,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:57:02,492 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:57:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:57:02,492 INFO L82 PathProgramCache]: Analyzing trace with hash 327016294, now seen corresponding path program 1 times [2020-07-17 17:57:02,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:57:02,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164737644] [2020-07-17 17:57:02,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:57:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 740 proven. 239 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-07-17 17:57:03,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164737644] [2020-07-17 17:57:03,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:57:03,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 17:57:03,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540531206] [2020-07-17 17:57:03,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 17:57:03,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:57:03,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 17:57:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-07-17 17:57:03,601 INFO L87 Difference]: Start difference. First operand 5862 states and 6837 transitions. Second operand 13 states. [2020-07-17 17:57:10,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:57:10,332 INFO L93 Difference]: Finished difference Result 14390 states and 17179 transitions. [2020-07-17 17:57:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 17:57:10,336 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 650 [2020-07-17 17:57:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:57:10,378 INFO L225 Difference]: With dead ends: 14390 [2020-07-17 17:57:10,379 INFO L226 Difference]: Without dead ends: 8849 [2020-07-17 17:57:10,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2020-07-17 17:57:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8849 states. [2020-07-17 17:57:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8849 to 8573. [2020-07-17 17:57:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8573 states. [2020-07-17 17:57:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8573 states to 8573 states and 10201 transitions. [2020-07-17 17:57:11,381 INFO L78 Accepts]: Start accepts. Automaton has 8573 states and 10201 transitions. Word has length 650 [2020-07-17 17:57:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:57:11,382 INFO L479 AbstractCegarLoop]: Abstraction has 8573 states and 10201 transitions. [2020-07-17 17:57:11,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 17:57:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 8573 states and 10201 transitions. [2020-07-17 17:57:11,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2020-07-17 17:57:11,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:57:11,395 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-07-17 17:57:11,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 17:57:11,395 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:57:11,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:57:11,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2142898512, now seen corresponding path program 1 times [2020-07-17 17:57:11,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:57:11,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285532045] [2020-07-17 17:57:11,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:57:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 497 proven. 253 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-07-17 17:57:12,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285532045] [2020-07-17 17:57:12,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:57:12,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 17:57:12,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045472650] [2020-07-17 17:57:12,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 17:57:12,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:57:12,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 17:57:12,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:57:12,780 INFO L87 Difference]: Start difference. First operand 8573 states and 10201 transitions. Second operand 11 states. [2020-07-17 17:57:19,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:57:19,981 INFO L93 Difference]: Finished difference Result 17365 states and 20714 transitions. [2020-07-17 17:57:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-17 17:57:19,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 755 [2020-07-17 17:57:19,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:57:20,029 INFO L225 Difference]: With dead ends: 17365 [2020-07-17 17:57:20,029 INFO L226 Difference]: Without dead ends: 9189 [2020-07-17 17:57:20,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 17:57:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2020-07-17 17:57:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 9156. [2020-07-17 17:57:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9156 states. [2020-07-17 17:57:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9156 states to 9156 states and 10840 transitions. [2020-07-17 17:57:21,137 INFO L78 Accepts]: Start accepts. Automaton has 9156 states and 10840 transitions. Word has length 755 [2020-07-17 17:57:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:57:21,137 INFO L479 AbstractCegarLoop]: Abstraction has 9156 states and 10840 transitions. [2020-07-17 17:57:21,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 17:57:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 9156 states and 10840 transitions. [2020-07-17 17:57:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2020-07-17 17:57:21,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:57:21,152 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:57:21,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 17:57:21,152 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:57:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:57:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1424837101, now seen corresponding path program 1 times [2020-07-17 17:57:21,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:57:21,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295278603] [2020-07-17 17:57:21,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:57:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 650 proven. 93 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2020-07-17 17:57:22,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295278603] [2020-07-17 17:57:22,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:57:22,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 17:57:22,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896077698] [2020-07-17 17:57:22,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 17:57:22,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:57:22,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 17:57:22,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:57:22,288 INFO L87 Difference]: Start difference. First operand 9156 states and 10840 transitions. Second operand 11 states. [2020-07-17 17:57:29,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:57:29,954 INFO L93 Difference]: Finished difference Result 19024 states and 22607 transitions. [2020-07-17 17:57:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-17 17:57:29,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 862 [2020-07-17 17:57:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:57:30,000 INFO L225 Difference]: With dead ends: 19024 [2020-07-17 17:57:30,000 INFO L226 Difference]: Without dead ends: 9863 [2020-07-17 17:57:30,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 17:57:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9863 states. [2020-07-17 17:57:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9863 to 9361. [2020-07-17 17:57:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9361 states. [2020-07-17 17:57:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9361 states to 9361 states and 10947 transitions. [2020-07-17 17:57:31,294 INFO L78 Accepts]: Start accepts. Automaton has 9361 states and 10947 transitions. Word has length 862 [2020-07-17 17:57:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:57:31,295 INFO L479 AbstractCegarLoop]: Abstraction has 9361 states and 10947 transitions. [2020-07-17 17:57:31,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 17:57:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 9361 states and 10947 transitions. [2020-07-17 17:57:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2020-07-17 17:57:31,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:57:31,306 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:57:31,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 17:57:31,306 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:57:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:57:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1498796944, now seen corresponding path program 1 times [2020-07-17 17:57:31,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:57:31,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551186667] [2020-07-17 17:57:31,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:57:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2343 backedges. 936 proven. 89 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2020-07-17 17:57:32,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551186667] [2020-07-17 17:57:32,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:57:32,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:57:32,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650824626] [2020-07-17 17:57:32,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:57:32,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:57:32,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:57:32,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:57:32,899 INFO L87 Difference]: Start difference. First operand 9361 states and 10947 transitions. Second operand 12 states. [2020-07-17 17:57:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:57:39,751 INFO L93 Difference]: Finished difference Result 18319 states and 21496 transitions. [2020-07-17 17:57:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-17 17:57:39,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 878 [2020-07-17 17:57:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:57:39,779 INFO L225 Difference]: With dead ends: 18319 [2020-07-17 17:57:39,780 INFO L226 Difference]: Without dead ends: 8758 [2020-07-17 17:57:39,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=319, Invalid=871, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 17:57:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8758 states. [2020-07-17 17:57:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8758 to 8693. [2020-07-17 17:57:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8693 states. [2020-07-17 17:57:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 9465 transitions. [2020-07-17 17:57:40,799 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 9465 transitions. Word has length 878 [2020-07-17 17:57:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:57:40,800 INFO L479 AbstractCegarLoop]: Abstraction has 8693 states and 9465 transitions. [2020-07-17 17:57:40,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:57:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 9465 transitions. [2020-07-17 17:57:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2020-07-17 17:57:40,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:57:40,811 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:57:40,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 17:57:40,812 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:57:40,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:57:40,812 INFO L82 PathProgramCache]: Analyzing trace with hash -705140446, now seen corresponding path program 1 times [2020-07-17 17:57:40,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:57:40,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667708457] [2020-07-17 17:57:40,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:57:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 806 proven. 144 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-07-17 17:57:42,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667708457] [2020-07-17 17:57:42,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:57:42,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 17:57:42,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421538888] [2020-07-17 17:57:42,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 17:57:42,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:57:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 17:57:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:57:42,369 INFO L87 Difference]: Start difference. First operand 8693 states and 9465 transitions. Second operand 14 states. [2020-07-17 17:57:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:57:57,802 INFO L93 Difference]: Finished difference Result 18156 states and 19771 transitions. [2020-07-17 17:57:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-17 17:57:57,803 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 949 [2020-07-17 17:57:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:57:57,839 INFO L225 Difference]: With dead ends: 18156 [2020-07-17 17:57:57,840 INFO L226 Difference]: Without dead ends: 9860 [2020-07-17 17:57:57,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=573, Invalid=2849, Unknown=0, NotChecked=0, Total=3422 [2020-07-17 17:57:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9860 states. [2020-07-17 17:57:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9860 to 8879. [2020-07-17 17:57:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8879 states. [2020-07-17 17:57:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8879 states to 8879 states and 9348 transitions. [2020-07-17 17:57:58,819 INFO L78 Accepts]: Start accepts. Automaton has 8879 states and 9348 transitions. Word has length 949 [2020-07-17 17:57:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:57:58,820 INFO L479 AbstractCegarLoop]: Abstraction has 8879 states and 9348 transitions. [2020-07-17 17:57:58,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 17:57:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 8879 states and 9348 transitions. [2020-07-17 17:57:58,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2020-07-17 17:57:58,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:57:58,835 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:57:58,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 17:57:58,835 INFO L427 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:57:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:57:58,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2102089486, now seen corresponding path program 1 times [2020-07-17 17:57:58,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:57:58,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884468096] [2020-07-17 17:57:58,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:57:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2627 backedges. 1074 proven. 599 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2020-07-17 17:58:00,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884468096] [2020-07-17 17:58:00,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:58:00,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:58:00,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257214180] [2020-07-17 17:58:00,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:58:00,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:58:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:58:00,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:58:00,294 INFO L87 Difference]: Start difference. First operand 8879 states and 9348 transitions. Second operand 9 states. [2020-07-17 17:58:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:58:04,737 INFO L93 Difference]: Finished difference Result 19906 states and 21021 transitions. [2020-07-17 17:58:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 17:58:04,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 998 [2020-07-17 17:58:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:58:04,779 INFO L225 Difference]: With dead ends: 19906 [2020-07-17 17:58:04,779 INFO L226 Difference]: Without dead ends: 11424 [2020-07-17 17:58:04,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-07-17 17:58:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11424 states. [2020-07-17 17:58:06,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11424 to 11211. [2020-07-17 17:58:06,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11211 states. [2020-07-17 17:58:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11211 states to 11211 states and 11788 transitions. [2020-07-17 17:58:06,109 INFO L78 Accepts]: Start accepts. Automaton has 11211 states and 11788 transitions. Word has length 998 [2020-07-17 17:58:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:58:06,109 INFO L479 AbstractCegarLoop]: Abstraction has 11211 states and 11788 transitions. [2020-07-17 17:58:06,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:58:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 11211 states and 11788 transitions. [2020-07-17 17:58:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1106 [2020-07-17 17:58:06,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:58:06,123 INFO L422 BasicCegarLoop]: trace histogram [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, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:58:06,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 17:58:06,123 INFO L427 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:58:06,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:58:06,124 INFO L82 PathProgramCache]: Analyzing trace with hash 143524116, now seen corresponding path program 1 times [2020-07-17 17:58:06,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:58:06,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179167791] [2020-07-17 17:58:06,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:58:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 1089 proven. 197 refuted. 0 times theorem prover too weak. 2005 trivial. 0 not checked. [2020-07-17 17:58:07,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179167791] [2020-07-17 17:58:07,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:58:07,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:58:07,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902810024] [2020-07-17 17:58:07,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:58:07,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:58:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:58:07,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:58:07,203 INFO L87 Difference]: Start difference. First operand 11211 states and 11788 transitions. Second operand 7 states. [2020-07-17 17:58:10,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:58:10,789 INFO L93 Difference]: Finished difference Result 23007 states and 24205 transitions. [2020-07-17 17:58:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:58:10,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1105 [2020-07-17 17:58:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:58:10,820 INFO L225 Difference]: With dead ends: 23007 [2020-07-17 17:58:10,820 INFO L226 Difference]: Without dead ends: 12193 [2020-07-17 17:58:10,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:58:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12193 states. [2020-07-17 17:58:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12193 to 11227. [2020-07-17 17:58:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11227 states. [2020-07-17 17:58:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11227 states to 11227 states and 11805 transitions. [2020-07-17 17:58:12,042 INFO L78 Accepts]: Start accepts. Automaton has 11227 states and 11805 transitions. Word has length 1105 [2020-07-17 17:58:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:58:12,043 INFO L479 AbstractCegarLoop]: Abstraction has 11227 states and 11805 transitions. [2020-07-17 17:58:12,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:58:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 11227 states and 11805 transitions. [2020-07-17 17:58:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1191 [2020-07-17 17:58:12,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:58:12,057 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, 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, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-07-17 17:58:12,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 17:58:12,058 INFO L427 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:58:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:58:12,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1554672207, now seen corresponding path program 1 times [2020-07-17 17:58:12,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:58:12,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38296392] [2020-07-17 17:58:12,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:58:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 2093 proven. 231 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2020-07-17 17:58:13,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38296392] [2020-07-17 17:58:13,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:58:13,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:58:13,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978877320] [2020-07-17 17:58:13,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:58:13,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:58:13,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:58:13,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:58:13,551 INFO L87 Difference]: Start difference. First operand 11227 states and 11805 transitions. Second operand 12 states. [2020-07-17 17:58:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:58:19,840 INFO L93 Difference]: Finished difference Result 25775 states and 27159 transitions. [2020-07-17 17:58:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-17 17:58:19,841 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1190 [2020-07-17 17:58:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:58:19,876 INFO L225 Difference]: With dead ends: 25775 [2020-07-17 17:58:19,876 INFO L226 Difference]: Without dead ends: 14945 [2020-07-17 17:58:19,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2020-07-17 17:58:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14945 states. [2020-07-17 17:58:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14945 to 13393. [2020-07-17 17:58:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13393 states. [2020-07-17 17:58:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13393 states to 13393 states and 14117 transitions. [2020-07-17 17:58:21,492 INFO L78 Accepts]: Start accepts. Automaton has 13393 states and 14117 transitions. Word has length 1190 [2020-07-17 17:58:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:58:21,493 INFO L479 AbstractCegarLoop]: Abstraction has 13393 states and 14117 transitions. [2020-07-17 17:58:21,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:58:21,493 INFO L276 IsEmpty]: Start isEmpty. Operand 13393 states and 14117 transitions. [2020-07-17 17:58:21,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1338 [2020-07-17 17:58:21,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:58:21,511 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-07-17 17:58:21,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 17:58:21,511 INFO L427 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:58:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:58:21,512 INFO L82 PathProgramCache]: Analyzing trace with hash -367966928, now seen corresponding path program 1 times [2020-07-17 17:58:21,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:58:21,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75970744] [2020-07-17 17:58:21,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:58:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5089 backedges. 1647 proven. 636 refuted. 0 times theorem prover too weak. 2806 trivial. 0 not checked. [2020-07-17 17:58:23,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75970744] [2020-07-17 17:58:23,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:58:23,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:58:23,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333942579] [2020-07-17 17:58:23,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:58:23,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:58:23,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:58:23,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:58:23,901 INFO L87 Difference]: Start difference. First operand 13393 states and 14117 transitions. Second operand 12 states. [2020-07-17 17:58:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:58:31,484 INFO L93 Difference]: Finished difference Result 28612 states and 30150 transitions. [2020-07-17 17:58:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-17 17:58:31,485 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1337 [2020-07-17 17:58:31,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:58:31,532 INFO L225 Difference]: With dead ends: 28612 [2020-07-17 17:58:31,532 INFO L226 Difference]: Without dead ends: 15234 [2020-07-17 17:58:31,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 17:58:31,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15234 states. [2020-07-17 17:58:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15234 to 13771. [2020-07-17 17:58:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13771 states. [2020-07-17 17:58:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13771 states to 13771 states and 14463 transitions. [2020-07-17 17:58:33,277 INFO L78 Accepts]: Start accepts. Automaton has 13771 states and 14463 transitions. Word has length 1337 [2020-07-17 17:58:33,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:58:33,278 INFO L479 AbstractCegarLoop]: Abstraction has 13771 states and 14463 transitions. [2020-07-17 17:58:33,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:58:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 13771 states and 14463 transitions. [2020-07-17 17:58:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1352 [2020-07-17 17:58:33,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:58:33,295 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, 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, 9, 9, 9, 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, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:58:33,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 17:58:33,295 INFO L427 AbstractCegarLoop]: === Iteration 21 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:58:33,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:58:33,296 INFO L82 PathProgramCache]: Analyzing trace with hash -120019293, now seen corresponding path program 1 times [2020-07-17 17:58:33,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:58:33,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268768353] [2020-07-17 17:58:33,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:58:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4694 backedges. 1424 proven. 227 refuted. 0 times theorem prover too weak. 3043 trivial. 0 not checked. [2020-07-17 17:58:35,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268768353] [2020-07-17 17:58:35,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:58:35,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:58:35,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269644534] [2020-07-17 17:58:35,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:58:35,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:58:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:58:35,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:58:35,431 INFO L87 Difference]: Start difference. First operand 13771 states and 14463 transitions. Second operand 9 states. [2020-07-17 17:58:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:58:41,339 INFO L93 Difference]: Finished difference Result 28308 states and 29716 transitions. [2020-07-17 17:58:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-17 17:58:41,340 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1351 [2020-07-17 17:58:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:58:41,376 INFO L225 Difference]: With dead ends: 28308 [2020-07-17 17:58:41,376 INFO L226 Difference]: Without dead ends: 14347 [2020-07-17 17:58:41,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-07-17 17:58:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2020-07-17 17:58:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 12624. [2020-07-17 17:58:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12624 states. [2020-07-17 17:58:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12624 states to 12624 states and 13237 transitions. [2020-07-17 17:58:43,051 INFO L78 Accepts]: Start accepts. Automaton has 12624 states and 13237 transitions. Word has length 1351 [2020-07-17 17:58:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:58:43,052 INFO L479 AbstractCegarLoop]: Abstraction has 12624 states and 13237 transitions. [2020-07-17 17:58:43,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:58:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 12624 states and 13237 transitions. [2020-07-17 17:58:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1560 [2020-07-17 17:58:43,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:58:43,072 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 8, 7, 7, 7, 7, 7, 7, 7, 6, 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, 3, 3, 3, 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] [2020-07-17 17:58:43,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 17:58:43,073 INFO L427 AbstractCegarLoop]: === Iteration 22 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:58:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:58:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash 279479539, now seen corresponding path program 1 times [2020-07-17 17:58:43,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:58:43,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636757523] [2020-07-17 17:58:43,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:58:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6663 backedges. 1803 proven. 2 refuted. 0 times theorem prover too weak. 4858 trivial. 0 not checked. [2020-07-17 17:58:45,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636757523] [2020-07-17 17:58:45,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:58:45,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:58:45,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678296288] [2020-07-17 17:58:45,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:58:45,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:58:45,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:58:45,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:58:45,792 INFO L87 Difference]: Start difference. First operand 12624 states and 13237 transitions. Second operand 7 states. [2020-07-17 17:58:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:58:49,366 INFO L93 Difference]: Finished difference Result 25822 states and 27072 transitions. [2020-07-17 17:58:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:58:49,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1559 [2020-07-17 17:58:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:58:49,398 INFO L225 Difference]: With dead ends: 25822 [2020-07-17 17:58:49,399 INFO L226 Difference]: Without dead ends: 13213 [2020-07-17 17:58:49,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:58:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13213 states. [2020-07-17 17:58:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13213 to 12813. [2020-07-17 17:58:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12813 states. [2020-07-17 17:58:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12813 states to 12813 states and 13432 transitions. [2020-07-17 17:58:51,048 INFO L78 Accepts]: Start accepts. Automaton has 12813 states and 13432 transitions. Word has length 1559 [2020-07-17 17:58:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:58:51,050 INFO L479 AbstractCegarLoop]: Abstraction has 12813 states and 13432 transitions. [2020-07-17 17:58:51,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:58:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 12813 states and 13432 transitions. [2020-07-17 17:58:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1624 [2020-07-17 17:58:51,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:58:51,069 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 8, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:58:51,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 17:58:51,069 INFO L427 AbstractCegarLoop]: === Iteration 23 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:58:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:58:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 962628263, now seen corresponding path program 1 times [2020-07-17 17:58:51,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:58:51,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084375103] [2020-07-17 17:58:51,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:58:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6863 backedges. 2720 proven. 109 refuted. 0 times theorem prover too weak. 4034 trivial. 0 not checked. [2020-07-17 17:58:54,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084375103] [2020-07-17 17:58:54,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:58:54,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:58:54,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758783814] [2020-07-17 17:58:54,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:58:54,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:58:54,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:58:54,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:58:54,008 INFO L87 Difference]: Start difference. First operand 12813 states and 13432 transitions. Second operand 9 states. [2020-07-17 17:58:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:58:59,495 INFO L93 Difference]: Finished difference Result 28967 states and 30369 transitions. [2020-07-17 17:58:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 17:58:59,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1623 [2020-07-17 17:58:59,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:58:59,536 INFO L225 Difference]: With dead ends: 28967 [2020-07-17 17:58:59,536 INFO L226 Difference]: Without dead ends: 15975 [2020-07-17 17:58:59,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-07-17 17:58:59,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15975 states. [2020-07-17 17:59:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15975 to 14407. [2020-07-17 17:59:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14407 states. [2020-07-17 17:59:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 15044 transitions. [2020-07-17 17:59:01,424 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 15044 transitions. Word has length 1623 [2020-07-17 17:59:01,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:59:01,426 INFO L479 AbstractCegarLoop]: Abstraction has 14407 states and 15044 transitions. [2020-07-17 17:59:01,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:59:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 15044 transitions. [2020-07-17 17:59:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1649 [2020-07-17 17:59:01,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:59:01,446 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 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, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:59:01,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 17:59:01,446 INFO L427 AbstractCegarLoop]: === Iteration 24 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:59:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:59:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1566052680, now seen corresponding path program 1 times [2020-07-17 17:59:01,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:59:01,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68417864] [2020-07-17 17:59:01,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:59:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7605 backedges. 1931 proven. 249 refuted. 0 times theorem prover too weak. 5425 trivial. 0 not checked. [2020-07-17 17:59:03,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68417864] [2020-07-17 17:59:03,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:59:03,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:59:03,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478372543] [2020-07-17 17:59:03,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:59:03,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:59:03,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:59:03,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:59:03,742 INFO L87 Difference]: Start difference. First operand 14407 states and 15044 transitions. Second operand 10 states. [2020-07-17 17:59:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:59:10,442 INFO L93 Difference]: Finished difference Result 29774 states and 31064 transitions. [2020-07-17 17:59:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 17:59:10,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1648 [2020-07-17 17:59:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:59:10,480 INFO L225 Difference]: With dead ends: 29774 [2020-07-17 17:59:10,481 INFO L226 Difference]: Without dead ends: 14764 [2020-07-17 17:59:10,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2020-07-17 17:59:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14764 states. [2020-07-17 17:59:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14764 to 13216. [2020-07-17 17:59:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13216 states. [2020-07-17 17:59:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13216 states to 13216 states and 13782 transitions. [2020-07-17 17:59:12,168 INFO L78 Accepts]: Start accepts. Automaton has 13216 states and 13782 transitions. Word has length 1648 [2020-07-17 17:59:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:59:12,169 INFO L479 AbstractCegarLoop]: Abstraction has 13216 states and 13782 transitions. [2020-07-17 17:59:12,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:59:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 13216 states and 13782 transitions. [2020-07-17 17:59:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1778 [2020-07-17 17:59:12,264 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:59:12,265 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 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, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 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] [2020-07-17 17:59:12,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 17:59:12,265 INFO L427 AbstractCegarLoop]: === Iteration 25 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:59:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:59:12,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1542163269, now seen corresponding path program 1 times [2020-07-17 17:59:12,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:59:12,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462553857] [2020-07-17 17:59:12,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:59:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8979 backedges. 2221 proven. 1846 refuted. 0 times theorem prover too weak. 4912 trivial. 0 not checked. [2020-07-17 17:59:15,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462553857] [2020-07-17 17:59:15,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:59:15,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-17 17:59:15,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921890426] [2020-07-17 17:59:15,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 17:59:15,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:59:15,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 17:59:15,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-07-17 17:59:15,876 INFO L87 Difference]: Start difference. First operand 13216 states and 13782 transitions. Second operand 23 states. [2020-07-17 17:59:29,043 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-17 17:59:47,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:59:47,252 INFO L93 Difference]: Finished difference Result 28799 states and 30008 transitions. [2020-07-17 17:59:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-07-17 17:59:47,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1777 [2020-07-17 17:59:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:59:47,271 INFO L225 Difference]: With dead ends: 28799 [2020-07-17 17:59:47,271 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 17:59:47,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10614 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3121, Invalid=23939, Unknown=0, NotChecked=0, Total=27060 [2020-07-17 17:59:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 17:59:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 17:59:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 17:59:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 17:59:47,305 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1777 [2020-07-17 17:59:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:59:47,306 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 17:59:47,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 17:59:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 17:59:47,306 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 17:59:47,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 17:59:47,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 17:59:52,068 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 425 [2020-07-17 17:59:53,161 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-07-17 17:59:56,213 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 425 [2020-07-17 17:59:59,339 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 91 [2020-07-17 18:00:00,143 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 425 [2020-07-17 18:00:04,423 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-17 18:00:09,191 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-07-17 18:00:13,737 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-07-17 18:00:17,560 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-07-17 18:00:21,053 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-07-17 18:00:25,101 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-07-17 18:00:28,572 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-07-17 18:01:34,393 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 425 [2020-07-17 18:02:23,630 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 142 [2020-07-17 18:02:23,921 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 141 [2020-07-17 18:05:22,119 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 425 [2020-07-17 18:06:53,867 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 142 [2020-07-17 18:06:54,159 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 141 [2020-07-17 18:08:08,985 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 425 [2020-07-17 18:08:29,742 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 121 [2020-07-17 18:08:34,850 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 230 [2020-07-17 18:08:35,070 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 183 [2020-07-17 18:08:35,867 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 251 [2020-07-17 18:08:36,343 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 204 [2020-07-17 18:08:37,458 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 247 [2020-07-17 18:08:37,889 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 245 [2020-07-17 18:08:39,864 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 213 [2020-07-17 18:08:39,969 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 209 [2020-07-17 18:08:40,340 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 202 [2020-07-17 18:08:42,838 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 170 [2020-07-17 18:08:43,148 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 214 [2020-07-17 18:08:43,756 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 225 [2020-07-17 18:08:45,000 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 185 [2020-07-17 18:08:45,986 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 230 [2020-07-17 18:08:49,939 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 209 [2020-07-17 18:08:51,883 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 220 [2020-07-17 18:08:54,972 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 213 [2020-07-17 18:08:55,328 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 214 [2020-07-17 18:08:55,583 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 243 [2020-07-17 18:08:56,440 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 202 [2020-07-17 18:09:01,419 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 230 [2020-07-17 18:09:02,427 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 251 [2020-07-17 18:09:02,910 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 204 [2020-07-17 18:09:04,048 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 247 [2020-07-17 18:09:04,476 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 245 [2020-07-17 18:09:06,449 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 213 [2020-07-17 18:09:06,555 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 209 [2020-07-17 18:09:06,931 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 202 [2020-07-17 18:09:09,425 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 170 [2020-07-17 18:09:09,723 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 214 [2020-07-17 18:09:10,355 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 225 [2020-07-17 18:09:11,607 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 185 [2020-07-17 18:09:12,572 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 230 [2020-07-17 18:09:16,529 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 209 [2020-07-17 18:09:18,472 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 220 [2020-07-17 18:09:23,040 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 285 DAG size of output: 213 [2020-07-17 18:09:23,387 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 214 [2020-07-17 18:09:23,649 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 243