/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/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:24:25,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:24:25,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:24:25,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:24:25,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:24:25,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:24:25,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:24:25,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:24:25,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:24:25,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:24:25,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:24:25,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:24:25,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:24:25,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:24:25,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:24:25,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:24:25,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:24:25,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:24:25,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:24:25,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:24:25,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:24:25,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:24:25,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:24:25,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:24:25,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:24:25,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:24:25,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:24:25,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:24:25,289 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 [2019-11-06 21:24:25,314 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:24:25,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:24:25,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:24:25,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:24:25,318 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:24:25,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:24:25,318 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:24:25,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:24:25,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:24:25,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:24:25,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:24:25,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:24:25,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:24:25,321 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:24:25,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:24:25,321 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:24:25,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:24:25,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:24:25,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:24:25,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:24:25,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:24:25,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:24:25,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:24:25,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:24:25,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:24:25,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:24:25,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:24:25,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:24:25,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:24:25,643 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:24:25,663 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:24:25,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:24:25,668 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:24:25,668 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:24:25,669 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2019-11-06 21:24:25,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d6b4c91e/8d3c1905b99c404299a394c18c735e2d/FLAG6c2fe0f8d [2019-11-06 21:24:26,139 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:24:26,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2019-11-06 21:24:26,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d6b4c91e/8d3c1905b99c404299a394c18c735e2d/FLAG6c2fe0f8d [2019-11-06 21:24:26,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d6b4c91e/8d3c1905b99c404299a394c18c735e2d [2019-11-06 21:24:26,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:24:26,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:24:26,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:24:26,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:24:26,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:24:26,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:24:26" (1/1) ... [2019-11-06 21:24:26,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6271b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26, skipping insertion in model container [2019-11-06 21:24:26,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:24:26" (1/1) ... [2019-11-06 21:24:26,547 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:24:26,566 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:24:26,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:24:26,785 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:24:26,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:24:26,824 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:24:26,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26 WrapperNode [2019-11-06 21:24:26,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:24:26,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:24:26,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:24:26,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:24:26,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26" (1/1) ... [2019-11-06 21:24:26,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26" (1/1) ... [2019-11-06 21:24:26,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26" (1/1) ... [2019-11-06 21:24:26,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26" (1/1) ... [2019-11-06 21:24:26,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26" (1/1) ... [2019-11-06 21:24:26,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26" (1/1) ... [2019-11-06 21:24:26,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26" (1/1) ... [2019-11-06 21:24:26,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:24:26,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:24:26,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:24:26,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:24:26,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26" (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 [2019-11-06 21:24:27,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:24:27,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:24:27,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:24:27,036 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-11-06 21:24:27,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:24:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:24:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 21:24:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:24:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-06 21:24:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-11-06 21:24:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:24:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:24:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 21:24:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:24:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:24:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:24:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:24:27,307 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:24:27,307 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:24:27,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:24:27 BoogieIcfgContainer [2019-11-06 21:24:27,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:24:27,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:24:27,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:24:27,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:24:27,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:24:26" (1/3) ... [2019-11-06 21:24:27,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56be01b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:24:27, skipping insertion in model container [2019-11-06 21:24:27,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:26" (2/3) ... [2019-11-06 21:24:27,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56be01b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:24:27, skipping insertion in model container [2019-11-06 21:24:27,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:24:27" (3/3) ... [2019-11-06 21:24:27,325 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_search.c [2019-11-06 21:24:27,336 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:24:27,353 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:24:27,366 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:24:27,391 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:24:27,392 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:24:27,392 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:24:27,392 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:24:27,392 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:24:27,392 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:24:27,392 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:24:27,393 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:24:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-06 21:24:27,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 21:24:27,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:27,418 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:27,421 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:27,426 INFO L82 PathProgramCache]: Analyzing trace with hash 868129876, now seen corresponding path program 1 times [2019-11-06 21:24:27,433 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:27,433 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727616237] [2019-11-06 21:24:27,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:27,675 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727616237] [2019-11-06 21:24:27,675 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:24:27,676 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:24:27,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874428545] [2019-11-06 21:24:27,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:24:27,683 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:27,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:24:27,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:24:27,700 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-11-06 21:24:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:27,813 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2019-11-06 21:24:27,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:24:27,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-06 21:24:27,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:27,823 INFO L225 Difference]: With dead ends: 45 [2019-11-06 21:24:27,823 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 21:24:27,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:24:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 21:24:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-06 21:24:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 21:24:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-06 21:24:27,870 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2019-11-06 21:24:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:27,871 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-06 21:24:27,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:24:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-06 21:24:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:24:27,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:27,873 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] [2019-11-06 21:24:27,873 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:27,874 INFO L82 PathProgramCache]: Analyzing trace with hash -202652409, now seen corresponding path program 1 times [2019-11-06 21:24:27,874 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:27,874 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802558418] [2019-11-06 21:24:27,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:28,111 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802558418] [2019-11-06 21:24:28,111 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:24:28,111 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 21:24:28,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834042034] [2019-11-06 21:24:28,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:24:28,114 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:28,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:24:28,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:24:28,115 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2019-11-06 21:24:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:28,344 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-06 21:24:28,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:24:28,345 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-06 21:24:28,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:28,346 INFO L225 Difference]: With dead ends: 30 [2019-11-06 21:24:28,346 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 21:24:28,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:24:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 21:24:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-06 21:24:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 21:24:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-06 21:24:28,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2019-11-06 21:24:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:28,355 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-06 21:24:28,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:24:28,355 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-06 21:24:28,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:24:28,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:28,356 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] [2019-11-06 21:24:28,357 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1540157926, now seen corresponding path program 1 times [2019-11-06 21:24:28,357 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:28,358 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576919213] [2019-11-06 21:24:28,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:28,604 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576919213] [2019-11-06 21:24:28,604 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:24:28,605 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 21:24:28,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146229568] [2019-11-06 21:24:28,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:24:28,606 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:28,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:24:28,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:24:28,606 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2019-11-06 21:24:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:28,759 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-11-06 21:24:28,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:24:28,759 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-06 21:24:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:28,760 INFO L225 Difference]: With dead ends: 34 [2019-11-06 21:24:28,761 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 21:24:28,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:24:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 21:24:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-06 21:24:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 21:24:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-06 21:24:28,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2019-11-06 21:24:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:28,770 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-06 21:24:28,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:24:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-06 21:24:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 21:24:28,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:28,771 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] [2019-11-06 21:24:28,772 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:28,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:28,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1697189824, now seen corresponding path program 1 times [2019-11-06 21:24:28,773 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:28,773 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868820618] [2019-11-06 21:24:28,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:28,973 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868820618] [2019-11-06 21:24:28,973 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:24:28,974 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 21:24:28,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025155623] [2019-11-06 21:24:28,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:24:28,975 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:28,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:24:28,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:24:28,975 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-11-06 21:24:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:29,137 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-06 21:24:29,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:24:29,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-06 21:24:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:29,139 INFO L225 Difference]: With dead ends: 43 [2019-11-06 21:24:29,139 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 21:24:29,141 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:24:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 21:24:29,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-06 21:24:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 21:24:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 21:24:29,151 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2019-11-06 21:24:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:29,151 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 21:24:29,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:24:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 21:24:29,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:24:29,154 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:29,154 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:29,155 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:29,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:29,155 INFO L82 PathProgramCache]: Analyzing trace with hash -255201960, now seen corresponding path program 1 times [2019-11-06 21:24:29,155 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:29,156 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17155583] [2019-11-06 21:24:29,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:29,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17155583] [2019-11-06 21:24:29,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741192381] [2019-11-06 21:24:29,355 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 [2019-11-06 21:24:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:29,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 21:24:29,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:29,502 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:24:29,502 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 21:24:29,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501259031] [2019-11-06 21:24:29,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:24:29,504 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:29,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:24:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:24:29,506 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2019-11-06 21:24:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:29,690 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2019-11-06 21:24:29,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:24:29,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-11-06 21:24:29,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:29,694 INFO L225 Difference]: With dead ends: 49 [2019-11-06 21:24:29,694 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 21:24:29,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:24:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 21:24:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-11-06 21:24:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 21:24:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-06 21:24:29,711 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 28 [2019-11-06 21:24:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:29,712 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-06 21:24:29,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:24:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-06 21:24:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:24:29,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:29,715 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:29,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:29,919 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:29,920 INFO L82 PathProgramCache]: Analyzing trace with hash 2963478, now seen corresponding path program 1 times [2019-11-06 21:24:29,921 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:29,921 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383846390] [2019-11-06 21:24:29,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:30,353 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383846390] [2019-11-06 21:24:30,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755821641] [2019-11-06 21:24:30,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 21:24:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:30,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 21:24:30,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:30,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:24:30,630 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2019-11-06 21:24:30,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596879171] [2019-11-06 21:24:30,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 21:24:30,632 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 21:24:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:24:30,633 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 16 states. [2019-11-06 21:24:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:31,675 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-11-06 21:24:31,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 21:24:31,675 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2019-11-06 21:24:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:31,677 INFO L225 Difference]: With dead ends: 49 [2019-11-06 21:24:31,677 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 21:24:31,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2019-11-06 21:24:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 21:24:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2019-11-06 21:24:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 21:24:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-06 21:24:31,685 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 28 [2019-11-06 21:24:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:31,686 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-06 21:24:31,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 21:24:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-06 21:24:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:24:31,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:31,687 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:31,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:31,888 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash -390063532, now seen corresponding path program 1 times [2019-11-06 21:24:31,889 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:31,889 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835162205] [2019-11-06 21:24:31,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:32,194 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 27 [2019-11-06 21:24:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:33,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835162205] [2019-11-06 21:24:33,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796549768] [2019-11-06 21:24:33,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 21:24:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:33,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-06 21:24:33,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:33,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:39,287 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2019-11-06 21:24:39,287 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:24:39,299 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 21:24:39,301 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 1 [2019-11-06 21:24:39,301 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:24:39,359 INFO L567 ElimStorePlain]: treesize reduction 280, result has 11.1 percent of original size [2019-11-06 21:24:39,360 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-11-06 21:24:39,360 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-11-06 21:24:39,360 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-11-06 21:24:39,361 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:24:39,361 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:377, output treesize:35 [2019-11-06 21:24:41,325 WARN L191 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 45 [2019-11-06 21:24:44,215 WARN L191 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-11-06 21:24:45,544 WARN L191 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2019-11-06 21:24:45,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:45,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:45,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:45,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:45,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:48,521 WARN L191 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2019-11-06 21:24:48,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:49,049 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2019-11-06 21:24:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:49,167 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:24:49,167 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2019-11-06 21:24:49,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070551635] [2019-11-06 21:24:49,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 21:24:49,168 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:49,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 21:24:49,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=609, Unknown=2, NotChecked=0, Total=702 [2019-11-06 21:24:49,169 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 27 states. [2019-11-06 21:24:49,854 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2019-11-06 21:24:51,947 WARN L191 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2019-11-06 21:24:54,446 WARN L191 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-11-06 21:24:55,943 WARN L191 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-11-06 21:24:58,098 WARN L191 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2019-11-06 21:24:58,988 WARN L191 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-06 21:25:00,312 WARN L191 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2019-11-06 21:25:02,856 WARN L191 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-11-06 21:25:03,507 WARN L191 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-11-06 21:25:04,692 WARN L191 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2019-11-06 21:25:04,868 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2019-11-06 21:25:06,149 WARN L191 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2019-11-06 21:25:06,345 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-11-06 21:25:06,640 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2019-11-06 21:25:06,936 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-11-06 21:25:07,273 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2019-11-06 21:25:07,570 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2019-11-06 21:25:07,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:07,756 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 21:25:07,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 21:25:07,757 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2019-11-06 21:25:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:07,759 INFO L225 Difference]: With dead ends: 58 [2019-11-06 21:25:07,759 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 21:25:07,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=381, Invalid=1873, Unknown=2, NotChecked=0, Total=2256 [2019-11-06 21:25:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 21:25:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2019-11-06 21:25:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 21:25:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-06 21:25:07,768 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 28 [2019-11-06 21:25:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:07,768 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-06 21:25:07,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 21:25:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-06 21:25:07,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 21:25:07,769 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:07,769 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:07,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:07,974 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:07,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:07,975 INFO L82 PathProgramCache]: Analyzing trace with hash -330785168, now seen corresponding path program 2 times [2019-11-06 21:25:07,975 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:07,975 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605186114] [2019-11-06 21:25:07,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:08,088 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605186114] [2019-11-06 21:25:08,088 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164416664] [2019-11-06 21:25:08,088 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 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 [2019-11-06 21:25:08,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 21:25:08,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:08,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 21:25:08,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:25:08,297 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:25:08,297 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2019-11-06 21:25:08,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683371020] [2019-11-06 21:25:08,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 21:25:08,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:08,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 21:25:08,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:25:08,299 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 13 states. [2019-11-06 21:25:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:09,360 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-11-06 21:25:09,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 21:25:09,361 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-11-06 21:25:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:09,362 INFO L225 Difference]: With dead ends: 64 [2019-11-06 21:25:09,362 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 21:25:09,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2019-11-06 21:25:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 21:25:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2019-11-06 21:25:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 21:25:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-11-06 21:25:09,371 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2019-11-06 21:25:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:09,372 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-11-06 21:25:09,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 21:25:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-11-06 21:25:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 21:25:09,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:09,373 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:09,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:09,583 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:09,584 INFO L82 PathProgramCache]: Analyzing trace with hash -465646740, now seen corresponding path program 2 times [2019-11-06 21:25:09,584 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:09,584 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193848614] [2019-11-06 21:25:09,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:10,024 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 30 [2019-11-06 21:25:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:10,612 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193848614] [2019-11-06 21:25:10,612 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905695220] [2019-11-06 21:25:10,613 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:10,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:10,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:10,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-06 21:25:10,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:10,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms