/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:30:04,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:30:04,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:30:04,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:30:04,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:30:04,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:30:04,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:30:04,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:30:04,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:30:04,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:30:04,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:30:04,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:30:04,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:30:04,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:30:04,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:30:04,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:30:04,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:30:04,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:30:04,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:30:04,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:30:04,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:30:04,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:30:04,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:30:04,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:30:04,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:30:04,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:30:04,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:30:04,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:30:04,631 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:30:04,645 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:30:04,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:30:04,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:30:04,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:30:04,647 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:30:04,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:30:04,648 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:30:04,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:30:04,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:30:04,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:30:04,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:30:04,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:30:04,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:30:04,649 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:30:04,649 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:30:04,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:30:04,650 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:30:04,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:30:04,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:30:04,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:30:04,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:30:04,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:30:04,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:30:04,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:30:04,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:30:04,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:30:04,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:30:04,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:30:04,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:30:04,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:30:04,932 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:30:04,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:30:04,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:30:04,950 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:30:04,950 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:30:04,951 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2019-11-23 20:30:05,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14715bd4/45fe21ec82ae47018d33b01c684cbdca/FLAGa60aec19e [2019-11-23 20:30:05,495 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:30:05,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2019-11-23 20:30:05,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14715bd4/45fe21ec82ae47018d33b01c684cbdca/FLAGa60aec19e [2019-11-23 20:30:05,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14715bd4/45fe21ec82ae47018d33b01c684cbdca [2019-11-23 20:30:05,888 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:30:05,890 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:30:05,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:30:05,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:30:05,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:30:05,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:30:05" (1/1) ... [2019-11-23 20:30:05,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a32c64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:05, skipping insertion in model container [2019-11-23 20:30:05,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:30:05" (1/1) ... [2019-11-23 20:30:05,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:30:05,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:30:06,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:30:06,166 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:30:06,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:30:06,210 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:30:06,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06 WrapperNode [2019-11-23 20:30:06,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:30:06,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:30:06,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:30:06,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:30:06,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (1/1) ... [2019-11-23 20:30:06,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (1/1) ... [2019-11-23 20:30:06,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:30:06,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:30:06,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:30:06,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:30:06,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (1/1) ... [2019-11-23 20:30:06,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (1/1) ... [2019-11-23 20:30:06,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (1/1) ... [2019-11-23 20:30:06,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (1/1) ... [2019-11-23 20:30:06,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (1/1) ... [2019-11-23 20:30:06,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (1/1) ... [2019-11-23 20:30:06,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (1/1) ... [2019-11-23 20:30:06,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:30:06,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:30:06,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:30:06,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:30:06,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (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 [2019-11-23 20:30:06,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:30:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:30:06,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:30:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:30:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:30:06,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:30:06,783 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:30:06,783 INFO L284 CfgBuilder]: Removed 16 assume(true) statements. [2019-11-23 20:30:06,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:30:06 BoogieIcfgContainer [2019-11-23 20:30:06,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:30:06,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:30:06,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:30:06,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:30:06,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:30:05" (1/3) ... [2019-11-23 20:30:06,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2609db57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:30:06, skipping insertion in model container [2019-11-23 20:30:06,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:30:06" (2/3) ... [2019-11-23 20:30:06,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2609db57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:30:06, skipping insertion in model container [2019-11-23 20:30:06,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:30:06" (3/3) ... [2019-11-23 20:30:06,793 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2019-11-23 20:30:06,805 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:30:06,811 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:30:06,821 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:30:06,845 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:30:06,845 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:30:06,845 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:30:06,845 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:30:06,846 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:30:06,846 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:30:06,846 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:30:06,846 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:30:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-23 20:30:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:30:06,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:06,866 INFO L410 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] [2019-11-23 20:30:06,866 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:06,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1478943884, now seen corresponding path program 1 times [2019-11-23 20:30:06,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:06,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175891112] [2019-11-23 20:30:06,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:30:07,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175891112] [2019-11-23 20:30:07,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:30:07,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:30:07,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083121282] [2019-11-23 20:30:07,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:30:07,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:07,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:30:07,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:30:07,069 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-11-23 20:30:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:07,221 INFO L93 Difference]: Finished difference Result 66 states and 122 transitions. [2019-11-23 20:30:07,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:30:07,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-23 20:30:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:07,237 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:30:07,237 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:30:07,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:30:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:30:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 20:30:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:30:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-23 20:30:07,286 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2019-11-23 20:30:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:07,287 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-23 20:30:07,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:30:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-23 20:30:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:30:07,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:07,289 INFO L410 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] [2019-11-23 20:30:07,289 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash 527193407, now seen corresponding path program 1 times [2019-11-23 20:30:07,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:07,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399390894] [2019-11-23 20:30:07,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:30:07,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399390894] [2019-11-23 20:30:07,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831572583] [2019-11-23 20:30:07,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:07,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:30:07,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:30:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:30:07,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:30:07,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:30:07,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890139487] [2019-11-23 20:30:07,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:30:07,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:07,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:30:07,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:30:07,632 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2019-11-23 20:30:07,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:07,783 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2019-11-23 20:30:07,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:30:07,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-11-23 20:30:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:07,786 INFO L225 Difference]: With dead ends: 75 [2019-11-23 20:30:07,786 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:30:07,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:30:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:30:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:30:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:30:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-11-23 20:30:07,808 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 32 [2019-11-23 20:30:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:07,808 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-11-23 20:30:07,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:30:07,810 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-11-23 20:30:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:30:07,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:07,813 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 20:30:08,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:08,019 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash -368986008, now seen corresponding path program 2 times [2019-11-23 20:30:08,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:08,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493653911] [2019-11-23 20:30:08,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:30:08,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493653911] [2019-11-23 20:30:08,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110832969] [2019-11-23 20:30:08,173 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:08,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:30:08,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:30:08,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:30:08,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:30:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:30:08,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:30:08,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:30:08,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944791678] [2019-11-23 20:30:08,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:30:08,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:08,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:30:08,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:30:08,266 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2019-11-23 20:30:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:08,401 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2019-11-23 20:30:08,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:30:08,402 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2019-11-23 20:30:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:08,403 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:30:08,403 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:30:08,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:30:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:30:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 20:30:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:30:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2019-11-23 20:30:08,413 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 41 [2019-11-23 20:30:08,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:08,413 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2019-11-23 20:30:08,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:30:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2019-11-23 20:30:08,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:30:08,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:08,415 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:30:08,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:08,619 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:08,620 INFO L82 PathProgramCache]: Analyzing trace with hash 763354719, now seen corresponding path program 3 times [2019-11-23 20:30:08,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:08,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88692349] [2019-11-23 20:30:08,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:30:08,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88692349] [2019-11-23 20:30:08,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642085493] [2019-11-23 20:30:08,721 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:08,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:30:08,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:30:08,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:30:08,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:30:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:30:08,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:30:08,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:30:08,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001079733] [2019-11-23 20:30:08,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:30:08,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:30:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:30:08,897 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 7 states. [2019-11-23 20:30:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:09,047 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2019-11-23 20:30:09,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:30:09,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-23 20:30:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:09,048 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:30:09,048 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:30:09,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:30:09,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:30:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-23 20:30:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:30:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2019-11-23 20:30:09,058 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 50 [2019-11-23 20:30:09,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:09,058 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2019-11-23 20:30:09,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:30:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2019-11-23 20:30:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:30:09,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:09,060 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:30:09,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:09,265 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:09,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:09,266 INFO L82 PathProgramCache]: Analyzing trace with hash -500879800, now seen corresponding path program 4 times [2019-11-23 20:30:09,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:09,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170838855] [2019-11-23 20:30:09,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 20:30:09,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170838855] [2019-11-23 20:30:09,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219958116] [2019-11-23 20:30:09,463 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:09,531 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:30:09,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:30:09,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:30:09,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:30:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 20:30:09,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:30:09,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:30:09,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793094854] [2019-11-23 20:30:09,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:30:09,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:09,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:30:09,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:30:09,561 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2019-11-23 20:30:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:09,735 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2019-11-23 20:30:09,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:30:09,736 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2019-11-23 20:30:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:09,737 INFO L225 Difference]: With dead ends: 126 [2019-11-23 20:30:09,737 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:30:09,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:30:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:30:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-23 20:30:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 20:30:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2019-11-23 20:30:09,750 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 59 [2019-11-23 20:30:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:09,750 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2019-11-23 20:30:09,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:30:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2019-11-23 20:30:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:30:09,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:09,752 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:30:09,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:09,965 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1617731713, now seen corresponding path program 5 times [2019-11-23 20:30:09,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:09,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490213322] [2019-11-23 20:30:09,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:30:10,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490213322] [2019-11-23 20:30:10,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887945848] [2019-11-23 20:30:10,123 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:37,926 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:31:37,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:37,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:31:37,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:31:38,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:38,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:31:38,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255614208] [2019-11-23 20:31:38,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:31:38,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:38,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:31:38,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:31:38,016 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 9 states. [2019-11-23 20:31:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:38,169 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2019-11-23 20:31:38,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:31:38,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2019-11-23 20:31:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:38,171 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:31:38,171 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:31:38,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:31:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:31:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-23 20:31:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:31:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2019-11-23 20:31:38,181 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 68 [2019-11-23 20:31:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:38,181 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2019-11-23 20:31:38,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:31:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2019-11-23 20:31:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:31:38,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:38,183 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:38,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:38,400 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:38,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1599394776, now seen corresponding path program 6 times [2019-11-23 20:31:38,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:38,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666337942] [2019-11-23 20:31:38,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-23 20:31:38,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666337942] [2019-11-23 20:31:38,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491469645] [2019-11-23 20:31:38,548 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,374 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:31:41,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:41,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:31:41,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-23 20:31:41,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:41,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:31:41,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791336957] [2019-11-23 20:31:41,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:31:41,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:41,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:31:41,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:31:41,409 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 10 states. [2019-11-23 20:31:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:41,612 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2019-11-23 20:31:41,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:31:41,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2019-11-23 20:31:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:41,614 INFO L225 Difference]: With dead ends: 160 [2019-11-23 20:31:41,614 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:31:41,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:31:41,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:31:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-11-23 20:31:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:31:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2019-11-23 20:31:41,625 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 77 [2019-11-23 20:31:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:41,625 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2019-11-23 20:31:41,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:31:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2019-11-23 20:31:41,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:31:41,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:41,627 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:41,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,832 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1824577695, now seen corresponding path program 7 times [2019-11-23 20:31:41,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:41,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321692735] [2019-11-23 20:31:41,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-11-23 20:31:41,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321692735] [2019-11-23 20:31:41,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856719453] [2019-11-23 20:31:41,967 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:42,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:31:42,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-11-23 20:31:42,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:42,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:31:42,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399714327] [2019-11-23 20:31:42,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:31:42,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:31:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:31:42,072 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 11 states. [2019-11-23 20:31:42,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:42,261 INFO L93 Difference]: Finished difference Result 177 states and 203 transitions. [2019-11-23 20:31:42,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:31:42,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2019-11-23 20:31:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:42,263 INFO L225 Difference]: With dead ends: 177 [2019-11-23 20:31:42,263 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:31:42,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:31:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:31:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-11-23 20:31:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:31:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2019-11-23 20:31:42,273 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 86 [2019-11-23 20:31:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:42,273 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2019-11-23 20:31:42,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:31:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2019-11-23 20:31:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:31:42,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:42,275 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:42,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,485 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:42,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:42,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1137069560, now seen corresponding path program 8 times [2019-11-23 20:31:42,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:42,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551895026] [2019-11-23 20:31:42,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:31:42,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551895026] [2019-11-23 20:31:42,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239312485] [2019-11-23 20:31:42,640 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:42,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:42,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:31:42,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:31:42,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:42,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:31:42,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358897026] [2019-11-23 20:31:42,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:31:42,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:31:42,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:31:42,751 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand 12 states. [2019-11-23 20:31:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:42,977 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2019-11-23 20:31:42,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:31:42,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2019-11-23 20:31:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:42,979 INFO L225 Difference]: With dead ends: 194 [2019-11-23 20:31:42,980 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 20:31:42,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:31:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 20:31:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-11-23 20:31:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-23 20:31:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2019-11-23 20:31:42,989 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 95 [2019-11-23 20:31:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:42,989 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2019-11-23 20:31:42,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:31:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2019-11-23 20:31:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 20:31:42,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:42,991 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:43,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:43,204 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:43,204 INFO L82 PathProgramCache]: Analyzing trace with hash -6141505, now seen corresponding path program 9 times [2019-11-23 20:31:43,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:43,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890074892] [2019-11-23 20:31:43,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-11-23 20:31:43,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890074892] [2019-11-23 20:31:43,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900527295] [2019-11-23 20:31:43,352 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true