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/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:47,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:47,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:47,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:47,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:47,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:47,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:47,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:47,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:47,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:47,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:47,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:47,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:47,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:47,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:47,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:47,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:47,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:47,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:47,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:47,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:47,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:47,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:47,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:47,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:47,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:47,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:47,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:47,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:47,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:47,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:47,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:47,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:47,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:47,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:47,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:47,409 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 [2019-10-14 23:16:47,423 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:47,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:47,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:47,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:47,425 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:47,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:47,426 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:47,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:47,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:47,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:47,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:47,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:47,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:47,427 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:47,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:47,428 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:47,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:47,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:47,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:47,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:47,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:47,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:47,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:47,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:47,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:47,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:47,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:47,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:47,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:47,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:47,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:47,723 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:47,724 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:47,724 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:47,725 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-1.i [2019-10-14 23:16:47,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a2fb101/932153c5d5a44c27b8f0e948f9f4699a/FLAG1bf3664a1 [2019-10-14 23:16:48,271 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:48,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-1.i [2019-10-14 23:16:48,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a2fb101/932153c5d5a44c27b8f0e948f9f4699a/FLAG1bf3664a1 [2019-10-14 23:16:48,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a2fb101/932153c5d5a44c27b8f0e948f9f4699a [2019-10-14 23:16:48,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:48,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:48,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:48,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:48,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:48,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:48" (1/1) ... [2019-10-14 23:16:48,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d29a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:48, skipping insertion in model container [2019-10-14 23:16:48,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:48" (1/1) ... [2019-10-14 23:16:48,734 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:48,756 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:48,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:48,974 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:48,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:49,009 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:49,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:49 WrapperNode [2019-10-14 23:16:49,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:49,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:49,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:49,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:49,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:49" (1/1) ... [2019-10-14 23:16:49,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:49" (1/1) ... [2019-10-14 23:16:49,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:49" (1/1) ... [2019-10-14 23:16:49,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:49" (1/1) ... [2019-10-14 23:16:49,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:49" (1/1) ... [2019-10-14 23:16:49,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:49" (1/1) ... [2019-10-14 23:16:49,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:49" (1/1) ... [2019-10-14 23:16:49,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:49,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:49,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:49,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:49,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:49" (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 [2019-10-14 23:16:49,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:49,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:49,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:49,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-14 23:16:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:49,364 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:49,367 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:16:49,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:49 BoogieIcfgContainer [2019-10-14 23:16:49,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:49,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:49,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:49,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:49,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:48" (1/3) ... [2019-10-14 23:16:49,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5daa16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:49, skipping insertion in model container [2019-10-14 23:16:49,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:49" (2/3) ... [2019-10-14 23:16:49,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5daa16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:49, skipping insertion in model container [2019-10-14 23:16:49,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:49" (3/3) ... [2019-10-14 23:16:49,388 INFO L109 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2019-10-14 23:16:49,398 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:49,405 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:49,417 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:49,442 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:49,442 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:49,442 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:49,442 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:49,443 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:49,443 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:49,443 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:49,443 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-14 23:16:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:16:49,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:49,467 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:49,468 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:49,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1345568573, now seen corresponding path program 1 times [2019-10-14 23:16:49,480 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:49,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24379655] [2019-10-14 23:16:49,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:49,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:49,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,920 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2019-10-14 23:16:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:49,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24379655] [2019-10-14 23:16:49,965 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:49,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:16:49,965 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134434748] [2019-10-14 23:16:49,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:49,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:49,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:49,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:49,985 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-10-14 23:16:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:50,098 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2019-10-14 23:16:50,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:50,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-10-14 23:16:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:50,110 INFO L225 Difference]: With dead ends: 38 [2019-10-14 23:16:50,110 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:16:50,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:50,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:16:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-14 23:16:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:16:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 23:16:50,152 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2019-10-14 23:16:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:50,153 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 23:16:50,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 23:16:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:16:50,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:50,155 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:50,155 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:50,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1402826875, now seen corresponding path program 1 times [2019-10-14 23:16:50,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:50,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940514616] [2019-10-14 23:16:50,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:50,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:50,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:50,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940514616] [2019-10-14 23:16:50,223 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:50,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:16:50,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355581990] [2019-10-14 23:16:50,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:50,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:50,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:50,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:50,227 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2019-10-14 23:16:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:50,275 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2019-10-14 23:16:50,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:16:50,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-14 23:16:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:50,279 INFO L225 Difference]: With dead ends: 35 [2019-10-14 23:16:50,279 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:16:50,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:16:50,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 23:16:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:16:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 23:16:50,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 12 [2019-10-14 23:16:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:50,299 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 23:16:50,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 23:16:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:16:50,301 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:50,301 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:50,302 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:50,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1436486517, now seen corresponding path program 1 times [2019-10-14 23:16:50,303 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:50,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418404120] [2019-10-14 23:16:50,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:50,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:50,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:50,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418404120] [2019-10-14 23:16:50,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738127807] [2019-10-14 23:16:50,465 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 [2019-10-14 23:16:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:50,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:50,595 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:50,595 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-14 23:16:50,595 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764410994] [2019-10-14 23:16:50,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:50,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:50,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:50,597 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2019-10-14 23:16:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:50,646 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2019-10-14 23:16:50,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:16:50,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 23:16:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:50,649 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:16:50,649 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:16:50,650 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:16:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:16:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:16:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-14 23:16:50,673 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2019-10-14 23:16:50,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:50,678 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-14 23:16:50,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:50,678 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-14 23:16:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:50,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:50,682 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:50,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:50,886 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1136980881, now seen corresponding path program 2 times [2019-10-14 23:16:50,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:50,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733595138] [2019-10-14 23:16:50,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:50,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:50,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:16:51,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733595138] [2019-10-14 23:16:51,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736018896] [2019-10-14 23:16:51,080 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:51,144 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:51,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:51,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:16:51,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:16:51,204 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:51,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-14 23:16:51,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168413189] [2019-10-14 23:16:51,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:16:51,207 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:51,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:16:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:51,207 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2019-10-14 23:16:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:51,279 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-14 23:16:51,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:51,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-10-14 23:16:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:51,282 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:16:51,282 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:16:51,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:16:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 23:16:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:16:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 23:16:51,297 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2019-10-14 23:16:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:51,298 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 23:16:51,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:16:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 23:16:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:16:51,302 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:51,302 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:51,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:51,515 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:51,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1851034775, now seen corresponding path program 3 times [2019-10-14 23:16:51,516 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:51,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422532082] [2019-10-14 23:16:51,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:51,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:51,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:16:51,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422532082] [2019-10-14 23:16:51,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826018232] [2019-10-14 23:16:51,711 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true