/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_copy8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:24:18,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:24:18,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:24:18,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:24:18,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:24:18,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:24:18,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:24:18,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:24:18,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:24:18,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:24:18,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:24:18,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:24:18,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:24:18,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:24:18,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:24:18,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:24:18,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:24:18,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:24:18,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:24:18,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:24:18,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:24:18,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:24:18,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:24:18,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:24:18,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:24:18,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:24:18,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:24:18,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:24:18,231 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 20:24:18,255 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:24:18,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:24:18,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:24:18,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:24:18,258 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:24:18,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:24:18,258 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:24:18,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:24:18,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:24:18,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:24:18,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:24:18,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:24:18,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:24:18,260 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:24:18,261 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:24:18,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:24:18,261 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:24:18,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:24:18,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:24:18,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:24:18,262 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:24:18,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:24:18,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:24:18,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:24:18,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:24:18,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:24:18,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:24:18,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:24:18,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:24:18,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:24:18,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:24:18,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:24:18,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:24:18,589 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:24:18,589 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:24:18,590 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2019-11-23 20:24:18,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1b4e0cef/f01b1dc06ee8473db70029d208d0e5a1/FLAG906d82dc8 [2019-11-23 20:24:19,128 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:24:19,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2019-11-23 20:24:19,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1b4e0cef/f01b1dc06ee8473db70029d208d0e5a1/FLAG906d82dc8 [2019-11-23 20:24:19,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1b4e0cef/f01b1dc06ee8473db70029d208d0e5a1 [2019-11-23 20:24:19,526 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:24:19,528 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:24:19,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:24:19,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:24:19,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:24:19,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e068800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19, skipping insertion in model container [2019-11-23 20:24:19,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:24:19,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:24:19,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:24:19,768 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:24:19,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:24:19,896 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:24:19,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19 WrapperNode [2019-11-23 20:24:19,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:24:19,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:24:19,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:24:19,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:24:19,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:24:19,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:24:19,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:24:19,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:24:19,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (1/1) ... [2019-11-23 20:24:19,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:24:19,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:24:19,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:24:19,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:24:19,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (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 20:24:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:24:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:24:20,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:24:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:24:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:24:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:24:20,526 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:24:20,526 INFO L284 CfgBuilder]: Removed 16 assume(true) statements. [2019-11-23 20:24:20,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:24:20 BoogieIcfgContainer [2019-11-23 20:24:20,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:24:20,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:24:20,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:24:20,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:24:20,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:24:19" (1/3) ... [2019-11-23 20:24:20,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6784d6f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:24:20, skipping insertion in model container [2019-11-23 20:24:20,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:19" (2/3) ... [2019-11-23 20:24:20,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6784d6f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:24:20, skipping insertion in model container [2019-11-23 20:24:20,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:24:20" (3/3) ... [2019-11-23 20:24:20,535 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2019-11-23 20:24:20,545 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:24:20,553 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:24:20,565 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:24:20,590 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:24:20,590 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:24:20,590 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:24:20,591 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:24:20,591 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:24:20,591 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:24:20,591 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:24:20,591 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:24:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-23 20:24:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:24:20,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:20,612 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 20:24:20,612 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1852783825, now seen corresponding path program 1 times [2019-11-23 20:24:20,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:20,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999336314] [2019-11-23 20:24:20,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:20,804 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 20:24:20,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999336314] [2019-11-23 20:24:20,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:24:20,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:24:20,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943822018] [2019-11-23 20:24:20,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:24:20,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:24:20,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:24:20,826 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-11-23 20:24:20,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:20,878 INFO L93 Difference]: Finished difference Result 76 states and 116 transitions. [2019-11-23 20:24:20,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:24:20,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-23 20:24:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:20,889 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:24:20,889 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:24:20,893 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 20:24:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:24:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-23 20:24:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:24:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:24:20,935 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 23 [2019-11-23 20:24:20,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:20,936 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:24:20,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:24:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:24:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:24:20,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:20,937 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 20:24:20,938 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1595357053, now seen corresponding path program 1 times [2019-11-23 20:24:20,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:20,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224372209] [2019-11-23 20:24:20,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:21,052 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 20:24:21,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224372209] [2019-11-23 20:24:21,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:24:21,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:24:21,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738943150] [2019-11-23 20:24:21,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:24:21,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:21,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:24:21,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:24:21,059 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2019-11-23 20:24:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:21,201 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2019-11-23 20:24:21,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:24:21,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:24:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:21,203 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:24:21,203 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:24:21,204 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 20:24:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:24:21,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2019-11-23 20:24:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:24:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-11-23 20:24:21,212 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2019-11-23 20:24:21,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:21,213 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-11-23 20:24:21,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:24:21,213 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-11-23 20:24:21,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:24:21,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:21,214 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] [2019-11-23 20:24:21,215 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:21,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:21,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1558845843, now seen corresponding path program 1 times [2019-11-23 20:24:21,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:21,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984234905] [2019-11-23 20:24:21,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:21,375 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 20:24:21,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984234905] [2019-11-23 20:24:21,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572137811] [2019-11-23 20:24:21,376 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 20:24:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:21,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:24:21,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:21,526 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 20:24:21,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:21,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:24:21,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146559952] [2019-11-23 20:24:21,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:24:21,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:21,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:24:21,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:24:21,530 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2019-11-23 20:24:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:21,602 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2019-11-23 20:24:21,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:24:21,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-11-23 20:24:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:21,605 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:24:21,605 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:24:21,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 20:24:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:24:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-23 20:24:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:24:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2019-11-23 20:24:21,613 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 41 [2019-11-23 20:24:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:21,614 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2019-11-23 20:24:21,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:24:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2019-11-23 20:24:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:24:21,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:21,616 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:21,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:21,828 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:21,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1389665195, now seen corresponding path program 2 times [2019-11-23 20:24:21,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:21,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731477780] [2019-11-23 20:24:21,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:24:21,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731477780] [2019-11-23 20:24:21,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461072095] [2019-11-23 20:24:21,937 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 20:24:22,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:24:22,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:22,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:24:22,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:24:22,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:22,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:24:22,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597735568] [2019-11-23 20:24:22,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:24:22,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:22,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:24:22,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:24:22,043 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 7 states. [2019-11-23 20:24:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:22,265 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2019-11-23 20:24:22,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:24:22,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-11-23 20:24:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:22,267 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:24:22,267 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:24:22,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:24:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:24:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2019-11-23 20:24:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:24:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-11-23 20:24:22,278 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 43 [2019-11-23 20:24:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:22,278 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-11-23 20:24:22,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:24:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-11-23 20:24:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:24:22,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:22,280 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:22,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:22,487 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:22,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash -132181927, now seen corresponding path program 3 times [2019-11-23 20:24:22,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:22,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833614460] [2019-11-23 20:24:22,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:24:22,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833614460] [2019-11-23 20:24:22,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123165369] [2019-11-23 20:24:22,646 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 20:24:22,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:24:22,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:22,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:24:22,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:24:22,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:22,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-23 20:24:22,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528734781] [2019-11-23 20:24:22,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:24:22,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:22,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:24:22,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:24:22,778 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 9 states. [2019-11-23 20:24:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:23,074 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2019-11-23 20:24:23,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:24:23,075 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2019-11-23 20:24:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:23,077 INFO L225 Difference]: With dead ends: 146 [2019-11-23 20:24:23,077 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:24:23,078 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:24:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:24:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2019-11-23 20:24:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:24:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2019-11-23 20:24:23,088 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 61 [2019-11-23 20:24:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:23,089 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2019-11-23 20:24:23,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:24:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2019-11-23 20:24:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:24:23,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:23,091 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-11-23 20:24:23,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:23,297 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1970500999, now seen corresponding path program 4 times [2019-11-23 20:24:23,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:23,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251834752] [2019-11-23 20:24:23,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:24:23,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251834752] [2019-11-23 20:24:23,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114394389] [2019-11-23 20:24:23,455 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 20:24:23,543 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:24:23,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:23,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:24:23,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-23 20:24:23,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:23,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 20:24:23,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219224158] [2019-11-23 20:24:23,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:24:23,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:23,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:24:23,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:24:23,617 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 11 states. [2019-11-23 20:24:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:23,860 INFO L93 Difference]: Finished difference Result 180 states and 206 transitions. [2019-11-23 20:24:23,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:24:23,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2019-11-23 20:24:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:23,862 INFO L225 Difference]: With dead ends: 180 [2019-11-23 20:24:23,862 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:24:23,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:24:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:24:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2019-11-23 20:24:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:24:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2019-11-23 20:24:23,873 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 79 [2019-11-23 20:24:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:23,874 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2019-11-23 20:24:23,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:24:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2019-11-23 20:24:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:24:23,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:23,876 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-11-23 20:24:24,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:24,080 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:24,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1406577461, now seen corresponding path program 5 times [2019-11-23 20:24:24,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:24,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492756820] [2019-11-23 20:24:24,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-23 20:24:24,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492756820] [2019-11-23 20:24:24,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984620140] [2019-11-23 20:24:24,202 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