/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_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:24:22,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:24:22,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:24:22,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:24:22,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:24:22,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:24:22,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:24:22,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:24:22,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:24:22,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:24:22,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:24:22,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:24:22,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:24:22,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:24:22,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:24:22,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:24:22,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:24:22,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:24:22,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:24:22,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:24:22,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:24:22,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:24:22,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:24:22,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:24:22,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:24:22,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:24:22,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:24:22,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:24:22,630 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 20:24:22,644 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:24:22,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:24:22,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:24:22,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:24:22,646 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:24:22,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:24:22,647 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:24:22,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:24:22,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:24:22,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:24:22,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:24:22,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:24:22,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:24:22,648 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:24:22,648 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:24:22,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:24:22,648 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:24:22,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:24:22,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:24:22,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:24:22,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:24:22,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:24:22,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:24:22,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:24:22,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:24:22,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:24:22,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:24:22,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:24:22,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:24:22,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:24:22,957 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:24:22,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:24:22,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:24:22,981 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:24:22,981 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:24:22,982 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2019-11-23 20:24:23,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d685cf37/a030640b3b964b7683af3797b2a336fc/FLAG290361f61 [2019-11-23 20:24:23,456 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:24:23,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2019-11-23 20:24:23,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d685cf37/a030640b3b964b7683af3797b2a336fc/FLAG290361f61 [2019-11-23 20:24:23,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d685cf37/a030640b3b964b7683af3797b2a336fc [2019-11-23 20:24:23,884 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:24:23,885 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:24:23,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:24:23,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:24:23,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:24:23,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:24:23" (1/1) ... [2019-11-23 20:24:23,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cd6405c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:23, skipping insertion in model container [2019-11-23 20:24:23,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:24:23" (1/1) ... [2019-11-23 20:24:23,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:24:23,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:24:24,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:24:24,097 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:24:24,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:24:24,240 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:24:24,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24 WrapperNode [2019-11-23 20:24:24,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:24:24,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:24:24,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:24:24,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:24:24,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (1/1) ... [2019-11-23 20:24:24,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (1/1) ... [2019-11-23 20:24:24,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:24:24,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:24:24,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:24:24,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:24:24,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (1/1) ... [2019-11-23 20:24:24,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (1/1) ... [2019-11-23 20:24:24,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (1/1) ... [2019-11-23 20:24:24,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (1/1) ... [2019-11-23 20:24:24,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (1/1) ... [2019-11-23 20:24:24,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (1/1) ... [2019-11-23 20:24:24,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (1/1) ... [2019-11-23 20:24:24,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:24:24,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:24:24,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:24:24,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:24:24,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (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 20:24:24,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:24:24,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:24:24,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:24:24,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:24:24,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:24:24,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:24:24,855 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:24:24,855 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 20:24:24,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:24:24 BoogieIcfgContainer [2019-11-23 20:24:24,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:24:24,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:24:24,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:24:24,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:24:24,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:24:23" (1/3) ... [2019-11-23 20:24:24,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141582a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:24:24, skipping insertion in model container [2019-11-23 20:24:24,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:24" (2/3) ... [2019-11-23 20:24:24,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141582a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:24:24, skipping insertion in model container [2019-11-23 20:24:24,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:24:24" (3/3) ... [2019-11-23 20:24:24,864 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2019-11-23 20:24:24,875 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:24:24,884 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:24:24,894 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:24:24,920 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:24:24,920 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:24:24,920 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:24:24,920 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:24:24,920 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:24:24,921 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:24:24,921 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:24:24,921 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:24:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-11-23 20:24:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:24:24,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:24,942 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] [2019-11-23 20:24:24,942 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:24,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1887916137, now seen corresponding path program 1 times [2019-11-23 20:24:24,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:24,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654607646] [2019-11-23 20:24:24,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:25,136 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 20:24:25,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654607646] [2019-11-23 20:24:25,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:24:25,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:24:25,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493012619] [2019-11-23 20:24:25,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:24:25,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:25,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:24:25,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:24:25,158 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2019-11-23 20:24:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:25,216 INFO L93 Difference]: Finished difference Result 82 states and 126 transitions. [2019-11-23 20:24:25,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:24:25,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:24:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:25,227 INFO L225 Difference]: With dead ends: 82 [2019-11-23 20:24:25,227 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:24:25,230 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 20:24:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:24:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-23 20:24:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:24:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-23 20:24:25,265 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 25 [2019-11-23 20:24:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:25,265 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-23 20:24:25,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:24:25,266 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-23 20:24:25,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:24:25,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:25,267 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] [2019-11-23 20:24:25,268 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:25,268 INFO L82 PathProgramCache]: Analyzing trace with hash -166940861, now seen corresponding path program 1 times [2019-11-23 20:24:25,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:25,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436171101] [2019-11-23 20:24:25,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:24:25,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436171101] [2019-11-23 20:24:25,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:24:25,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:24:25,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837091132] [2019-11-23 20:24:25,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:24:25,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:25,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:24:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:24:25,389 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-23 20:24:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:25,525 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2019-11-23 20:24:25,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:24:25,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-11-23 20:24:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:25,527 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:24:25,527 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:24:25,529 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 20:24:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:24:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2019-11-23 20:24:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:24:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2019-11-23 20:24:25,537 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 27 [2019-11-23 20:24:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:25,538 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2019-11-23 20:24:25,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:24:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2019-11-23 20:24:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:24:25,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:25,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:25,540 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1109508687, now seen corresponding path program 1 times [2019-11-23 20:24:25,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:25,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661926471] [2019-11-23 20:24:25,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:24:25,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661926471] [2019-11-23 20:24:25,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987594753] [2019-11-23 20:24:25,702 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 20:24:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:25,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:24:25,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:24:25,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:25,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:24:25,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025954641] [2019-11-23 20:24:25,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:24:25,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:25,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:24:25,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:24:25,858 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 6 states. [2019-11-23 20:24:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:26,108 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2019-11-23 20:24:26,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:24:26,109 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-11-23 20:24:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:26,110 INFO L225 Difference]: With dead ends: 121 [2019-11-23 20:24:26,110 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:24:26,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:24:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:24:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2019-11-23 20:24:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:24:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2019-11-23 20:24:26,121 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 45 [2019-11-23 20:24:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:26,121 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2019-11-23 20:24:26,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:24:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2019-11-23 20:24:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:24:26,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:26,125 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 20:24:26,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:26,326 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:26,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1870323549, now seen corresponding path program 2 times [2019-11-23 20:24:26,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:26,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764812985] [2019-11-23 20:24:26,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:24:26,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764812985] [2019-11-23 20:24:26,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547120390] [2019-11-23 20:24:26,491 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 20:24:26,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:24:26,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:26,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:24:26,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:24:26,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:26,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-23 20:24:26,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813259878] [2019-11-23 20:24:26,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:24:26,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:26,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:24:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:24:26,615 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 8 states. [2019-11-23 20:24:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:26,882 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2019-11-23 20:24:26,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:24:26,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2019-11-23 20:24:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:26,883 INFO L225 Difference]: With dead ends: 159 [2019-11-23 20:24:26,884 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:24:26,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:24:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:24:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2019-11-23 20:24:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:24:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2019-11-23 20:24:26,895 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 65 [2019-11-23 20:24:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:26,896 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2019-11-23 20:24:26,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:24:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2019-11-23 20:24:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:24:26,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:26,898 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2019-11-23 20:24:27,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:27,102 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:27,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1430561545, now seen corresponding path program 3 times [2019-11-23 20:24:27,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:27,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399372825] [2019-11-23 20:24:27,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:24:27,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399372825] [2019-11-23 20:24:27,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019847553] [2019-11-23 20:24:27,340 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 20:24:27,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:24:27,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:27,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:24:27,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:24:27,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:27,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 20:24:27,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360851934] [2019-11-23 20:24:27,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:24:27,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:27,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:24:27,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:24:27,701 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 10 states. [2019-11-23 20:24:27,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:27,940 INFO L93 Difference]: Finished difference Result 197 states and 226 transitions. [2019-11-23 20:24:27,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:24:27,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2019-11-23 20:24:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:27,942 INFO L225 Difference]: With dead ends: 197 [2019-11-23 20:24:27,942 INFO L226 Difference]: Without dead ends: 118 [2019-11-23 20:24:27,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:24:27,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-23 20:24:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2019-11-23 20:24:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:24:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2019-11-23 20:24:27,954 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 85 [2019-11-23 20:24:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:27,955 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2019-11-23 20:24:27,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:24:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2019-11-23 20:24:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 20:24:27,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:27,961 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2019-11-23 20:24:28,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:28,167 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash 867862709, now seen corresponding path program 4 times [2019-11-23 20:24:28,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:28,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043509954] [2019-11-23 20:24:28,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:24:28,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043509954] [2019-11-23 20:24:28,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729692397] [2019-11-23 20:24:28,396 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 20:24:28,498 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:24:28,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:28,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:24:28,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:24:28,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:28,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-23 20:24:28,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32635383] [2019-11-23 20:24:28,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:24:28,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:24:28,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:24:28,600 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 12 states. [2019-11-23 20:24:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:28,873 INFO L93 Difference]: Finished difference Result 235 states and 264 transitions. [2019-11-23 20:24:28,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:24:28,874 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 105 [2019-11-23 20:24:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:28,875 INFO L225 Difference]: With dead ends: 235 [2019-11-23 20:24:28,875 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:24:28,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:24:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:24:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2019-11-23 20:24:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 20:24:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2019-11-23 20:24:28,887 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 105 [2019-11-23 20:24:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:28,887 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2019-11-23 20:24:28,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:24:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2019-11-23 20:24:28,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:24:28,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:28,890 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1] [2019-11-23 20:24:29,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:29,103 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:29,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:29,104 INFO L82 PathProgramCache]: Analyzing trace with hash -723808159, now seen corresponding path program 5 times [2019-11-23 20:24:29,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:29,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336085871] [2019-11-23 20:24:29,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:24:29,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336085871] [2019-11-23 20:24:29,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601083748] [2019-11-23 20:24:29,277 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