/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:57,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:57,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:57,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:57,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:57,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:57,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:57,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:57,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:57,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:57,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:57,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:57,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:57,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:57,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:57,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:57,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:57,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:57,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:57,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:57,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:57,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:57,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:58,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:58,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:58,034 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 [2020-08-22 16:56:58,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:58,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:58,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:58,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:58,062 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:58,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:58,063 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:58,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:58,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:58,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:58,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:58,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:58,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:58,064 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:58,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:58,064 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:58,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:58,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:58,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:58,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:58,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:58,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:58,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:58,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:58,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:58,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:58,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:58,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:58,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:58,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:58,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:58,385 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:58,389 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:58,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:58,390 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:58,391 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-08-22 16:56:58,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3cdf92ed/9d326a75ebf94974b533e2554eee36cd/FLAG9f14b7e18 [2020-08-22 16:56:58,881 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:58,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2020-08-22 16:56:58,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3cdf92ed/9d326a75ebf94974b533e2554eee36cd/FLAG9f14b7e18 [2020-08-22 16:56:59,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3cdf92ed/9d326a75ebf94974b533e2554eee36cd [2020-08-22 16:56:59,274 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:56:59,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:56:59,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:59,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:56:59,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:56:59,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:59" (1/1) ... [2020-08-22 16:56:59,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ac305d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59, skipping insertion in model container [2020-08-22 16:56:59,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:59" (1/1) ... [2020-08-22 16:56:59,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:56:59,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:56:59,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:59,525 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:56:59,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:59,682 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:56:59,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59 WrapperNode [2020-08-22 16:56:59,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:59,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:56:59,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:56:59,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:56:59,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59" (1/1) ... [2020-08-22 16:56:59,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59" (1/1) ... [2020-08-22 16:56:59,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59" (1/1) ... [2020-08-22 16:56:59,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59" (1/1) ... [2020-08-22 16:56:59,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59" (1/1) ... [2020-08-22 16:56:59,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59" (1/1) ... [2020-08-22 16:56:59,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59" (1/1) ... [2020-08-22 16:56:59,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:56:59,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:56:59,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:56:59,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:56:59,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:59,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:56:59,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:56:59,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:56:59,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:56:59,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:56:59,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:56:59,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:56:59,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:56:59,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:56:59,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-08-22 16:56:59,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:56:59,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:57:00,021 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:57:00,021 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 16:57:00,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:00 BoogieIcfgContainer [2020-08-22 16:57:00,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:57:00,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:57:00,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:57:00,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:57:00,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:56:59" (1/3) ... [2020-08-22 16:57:00,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd39df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:00, skipping insertion in model container [2020-08-22 16:57:00,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:59" (2/3) ... [2020-08-22 16:57:00,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd39df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:00, skipping insertion in model container [2020-08-22 16:57:00,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:00" (3/3) ... [2020-08-22 16:57:00,034 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-08-22 16:57:00,046 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:57:00,055 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:57:00,071 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:57:00,099 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:57:00,100 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:57:00,100 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:57:00,100 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:57:00,100 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:57:00,100 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:57:00,101 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:57:00,101 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:57:00,123 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-22 16:57:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-08-22 16:57:00,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:00,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:00,130 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash 242978043, now seen corresponding path program 1 times [2020-08-22 16:57:00,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:00,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271519822] [2020-08-22 16:57:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:00,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:00,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271519822] [2020-08-22 16:57:00,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:00,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:57:00,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722786523] [2020-08-22 16:57:00,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:57:00,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:00,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:57:00,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:57:00,395 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-08-22 16:57:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:00,519 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2020-08-22 16:57:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:57:00,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-08-22 16:57:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:00,532 INFO L225 Difference]: With dead ends: 42 [2020-08-22 16:57:00,532 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 16:57:00,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:57:00,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 16:57:00,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-08-22 16:57:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 16:57:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-08-22 16:57:00,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2020-08-22 16:57:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:00,575 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-08-22 16:57:00,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:57:00,576 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-08-22 16:57:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-08-22 16:57:00,576 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:00,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:00,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:57:00,577 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:00,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:00,578 INFO L82 PathProgramCache]: Analyzing trace with hash 242949213, now seen corresponding path program 1 times [2020-08-22 16:57:00,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:00,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311051620] [2020-08-22 16:57:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:00,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:00,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311051620] [2020-08-22 16:57:00,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:00,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:57:00,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126008557] [2020-08-22 16:57:00,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:57:00,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:00,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:57:00,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:57:00,673 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-08-22 16:57:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:00,777 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-22 16:57:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:00,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-08-22 16:57:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:00,779 INFO L225 Difference]: With dead ends: 36 [2020-08-22 16:57:00,779 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 16:57:00,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 16:57:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2020-08-22 16:57:00,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-22 16:57:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-22 16:57:00,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2020-08-22 16:57:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:00,788 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-22 16:57:00,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:57:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-22 16:57:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 16:57:00,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:00,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:00,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:57:00,790 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash 713101374, now seen corresponding path program 1 times [2020-08-22 16:57:00,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:00,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173691195] [2020-08-22 16:57:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:00,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:00,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173691195] [2020-08-22 16:57:00,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:00,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:57:00,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008990455] [2020-08-22 16:57:00,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:57:00,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:00,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:57:00,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:57:00,869 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-08-22 16:57:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:00,976 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-08-22 16:57:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:00,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-08-22 16:57:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:00,978 INFO L225 Difference]: With dead ends: 40 [2020-08-22 16:57:00,978 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 16:57:00,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 16:57:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2020-08-22 16:57:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 16:57:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-08-22 16:57:00,986 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-08-22 16:57:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:00,987 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-08-22 16:57:00,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:57:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-08-22 16:57:00,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 16:57:00,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:00,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:00,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:57:00,989 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:00,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1111837415, now seen corresponding path program 1 times [2020-08-22 16:57:00,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:00,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844343256] [2020-08-22 16:57:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:01,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844343256] [2020-08-22 16:57:01,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:01,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:57:01,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353238018] [2020-08-22 16:57:01,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:57:01,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:01,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:57:01,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:57:01,087 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-08-22 16:57:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:01,184 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-08-22 16:57:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:01,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-08-22 16:57:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:01,186 INFO L225 Difference]: With dead ends: 31 [2020-08-22 16:57:01,186 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:57:01,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:57:01,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-08-22 16:57:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 16:57:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-22 16:57:01,199 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-08-22 16:57:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:01,199 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-22 16:57:01,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:57:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-22 16:57:01,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 16:57:01,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:01,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:01,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 16:57:01,201 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:01,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1672606071, now seen corresponding path program 1 times [2020-08-22 16:57:01,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:01,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300911604] [2020-08-22 16:57:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:01,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300911604] [2020-08-22 16:57:01,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655210186] [2020-08-22 16:57:01,322 INFO L95 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 [2020-08-22 16:57:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:57:01,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:01,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:01,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-08-22 16:57:01,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926621237] [2020-08-22 16:57:01,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:57:01,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:01,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:57:01,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:01,451 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2020-08-22 16:57:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:01,563 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-08-22 16:57:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:57:01,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-22 16:57:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:01,565 INFO L225 Difference]: With dead ends: 34 [2020-08-22 16:57:01,565 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 16:57:01,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:57:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 16:57:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-08-22 16:57:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 16:57:01,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-08-22 16:57:01,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-08-22 16:57:01,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:01,572 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-08-22 16:57:01,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:57:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-08-22 16:57:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:57:01,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:01,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:01,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:01,774 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:01,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1758170709, now seen corresponding path program 2 times [2020-08-22 16:57:01,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:01,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973292157] [2020-08-22 16:57:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:01,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973292157] [2020-08-22 16:57:01,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477406366] [2020-08-22 16:57:01,886 INFO L93 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 [2020-08-22 16:57:01,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:57:01,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:01,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:57:01,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:57:01,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:01,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-08-22 16:57:01,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22368988] [2020-08-22 16:57:01,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:57:01,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:01,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:57:01,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:57:01,943 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2020-08-22 16:57:01,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:01,946 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-08-22 16:57:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:57:01,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 16:57:01,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:01,947 INFO L225 Difference]: With dead ends: 20 [2020-08-22 16:57:01,947 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:57:01,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:57:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:57:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:57:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:57:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:57:01,949 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-22 16:57:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:01,949 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:57:01,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:57:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:57:01,949 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:57:02,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:02,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:57:02,258 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:57:02,259 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#array~0.base| |old(~#array~0.base)|) (= |old(#length)| |#length|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |~#array~0.offset| |old(~#array~0.offset)|)) [2020-08-22 16:57:02,259 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:57:02,259 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:57:02,259 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:57:02,259 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:57:02,259 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:57:02,259 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 5 21) no Hoare annotation was computed. [2020-08-22 16:57:02,259 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 5 21) no Hoare annotation was computed. [2020-08-22 16:57:02,260 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-22 16:57:02,261 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (= main_~a~0 1) [2020-08-22 16:57:02,261 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2020-08-22 16:57:02,261 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 5 21) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-08-22 16:57:02,262 INFO L264 CegarLoopResult]: At program point L16(lines 6 21) the Hoare annotation is: false [2020-08-22 16:57:02,262 INFO L268 CegarLoopResult]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2020-08-22 16:57:02,262 INFO L264 CegarLoopResult]: At program point L12-3(lines 12 13) the Hoare annotation is: (= main_~a~0 1) [2020-08-22 16:57:02,262 INFO L268 CegarLoopResult]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2020-08-22 16:57:02,262 INFO L264 CegarLoopResult]: At program point L10-3(lines 10 13) the Hoare annotation is: (= main_~a~0 1) [2020-08-22 16:57:02,262 INFO L268 CegarLoopResult]: For program point L10-4(lines 6 21) no Hoare annotation was computed. [2020-08-22 16:57:02,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:57:02 BoogieIcfgContainer [2020-08-22 16:57:02,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:57:02,289 INFO L168 Benchmark]: Toolchain (without parser) took 3011.05 ms. Allocated memory was 140.5 MB in the beginning and 261.6 MB in the end (delta: 121.1 MB). Free memory was 103.3 MB in the beginning and 191.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:02,300 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:57:02,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.75 ms. Allocated memory was 140.5 MB in the beginning and 220.2 MB in the end (delta: 79.7 MB). Free memory was 103.1 MB in the beginning and 206.3 MB in the end (delta: -103.2 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:02,303 INFO L168 Benchmark]: Boogie Preprocessor took 42.07 ms. Allocated memory is still 220.2 MB. Free memory was 206.3 MB in the beginning and 204.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:02,304 INFO L168 Benchmark]: RCFGBuilder took 300.11 ms. Allocated memory is still 220.2 MB. Free memory was 204.3 MB in the beginning and 187.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:02,304 INFO L168 Benchmark]: TraceAbstraction took 2256.53 ms. Allocated memory was 220.2 MB in the beginning and 261.6 MB in the end (delta: 41.4 MB). Free memory was 187.5 MB in the beginning and 191.2 MB in the end (delta: -3.6 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:02,312 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 407.75 ms. Allocated memory was 140.5 MB in the beginning and 220.2 MB in the end (delta: 79.7 MB). Free memory was 103.1 MB in the beginning and 206.3 MB in the end (delta: -103.2 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.07 ms. Allocated memory is still 220.2 MB. Free memory was 206.3 MB in the beginning and 204.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.11 ms. Allocated memory is still 220.2 MB. Free memory was 204.3 MB in the beginning and 187.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2256.53 ms. Allocated memory was 220.2 MB in the beginning and 261.6 MB in the end (delta: 41.4 MB). Free memory was 187.5 MB in the beginning and 191.2 MB in the end (delta: -3.6 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 66 SDslu, 56 SDs, 0 SdLazy, 128 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 15 NumberOfFragments, 37 HoareAnnotationTreeSize, 8 FomulaSimplifications, 316 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 19 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 117 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 4466 SizeOfPredicates, 2 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 15/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...