/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:54:40,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:54:40,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:54:40,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:54:40,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:54:40,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:54:40,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:54:40,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:54:40,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:54:40,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:54:40,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:54:40,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:54:40,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:54:40,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:54:40,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:54:40,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:54:40,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:54:40,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:54:40,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:54:40,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:54:40,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:54:40,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:54:40,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:54:40,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:54:40,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:54:40,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:54:40,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:54:40,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:54:40,458 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 22:54:40,472 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:54:40,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:54:40,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:54:40,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:54:40,474 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:54:40,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:54:40,474 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:54:40,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:54:40,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:54:40,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:54:40,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:54:40,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:54:40,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:54:40,476 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:54:40,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:54:40,476 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:54:40,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:54:40,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:54:40,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:54:40,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:54:40,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:54:40,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:54:40,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:54:40,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:54:40,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:54:40,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:54:40,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:54:40,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:54:40,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:54:40,791 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:54:40,814 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:54:40,818 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:54:40,819 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:54:40,819 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:54:40,820 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label24.c [2019-11-06 22:54:40,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d0a2334/f80a2f2ba210449b9e5ed1870fafe96e/FLAG633dc4a6a [2019-11-06 22:54:41,546 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:54:41,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label24.c [2019-11-06 22:54:41,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d0a2334/f80a2f2ba210449b9e5ed1870fafe96e/FLAG633dc4a6a [2019-11-06 22:54:41,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d0a2334/f80a2f2ba210449b9e5ed1870fafe96e [2019-11-06 22:54:41,734 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:54:41,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:54:41,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:41,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:54:41,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:54:41,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:41" (1/1) ... [2019-11-06 22:54:41,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f8a51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:41, skipping insertion in model container [2019-11-06 22:54:41,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:41" (1/1) ... [2019-11-06 22:54:41,753 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:54:41,833 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:54:42,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:42,829 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:54:43,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:43,141 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:54:43,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43 WrapperNode [2019-11-06 22:54:43,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:43,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:54:43,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:54:43,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:54:43,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:54:43,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:54:43,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:54:43,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:54:43,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (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 22:54:43,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:54:43,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:54:43,356 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:54:43,356 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:54:43,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:54:43,356 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:54:43,357 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:54:43,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:54:43,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:54:43,357 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:54:43,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:54:43,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:54:43,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:54:45,762 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:54:45,762 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:54:45,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:45 BoogieIcfgContainer [2019-11-06 22:54:45,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:54:45,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:54:45,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:54:45,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:54:45,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:41" (1/3) ... [2019-11-06 22:54:45,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f8e76c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:45, skipping insertion in model container [2019-11-06 22:54:45,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (2/3) ... [2019-11-06 22:54:45,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f8e76c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:45, skipping insertion in model container [2019-11-06 22:54:45,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:45" (3/3) ... [2019-11-06 22:54:45,772 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label24.c [2019-11-06 22:54:45,782 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:54:45,790 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:54:45,802 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:54:45,832 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:54:45,832 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:54:45,832 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:54:45,833 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:54:45,833 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:54:45,833 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:54:45,833 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:54:45,833 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:54:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:54:45,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 22:54:45,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:45,881 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:45,883 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:45,889 INFO L82 PathProgramCache]: Analyzing trace with hash 272014893, now seen corresponding path program 1 times [2019-11-06 22:54:45,898 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:45,899 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181431608] [2019-11-06 22:54:45,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:46,229 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 22:54:46,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181431608] [2019-11-06 22:54:46,231 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:46,231 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:54:46,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506394084] [2019-11-06 22:54:46,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:54:46,240 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:54:46,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:54:46,258 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:54:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:50,083 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:54:50,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:54:50,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2019-11-06 22:54:50,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:50,109 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:54:50,109 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:54:50,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 22:54:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:54:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:54:50,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1166 transitions. [2019-11-06 22:54:50,229 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1166 transitions. Word has length 58 [2019-11-06 22:54:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:50,230 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1166 transitions. [2019-11-06 22:54:50,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:54:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1166 transitions. [2019-11-06 22:54:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-06 22:54:50,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:50,239 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:50,240 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:50,240 INFO L82 PathProgramCache]: Analyzing trace with hash 614033461, now seen corresponding path program 1 times [2019-11-06 22:54:50,241 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:50,241 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284622393] [2019-11-06 22:54:50,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:50,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284622393] [2019-11-06 22:54:50,571 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:50,572 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:50,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134498858] [2019-11-06 22:54:50,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:50,574 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:50,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:50,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:50,575 INFO L87 Difference]: Start difference. First operand 682 states and 1166 transitions. Second operand 6 states. [2019-11-06 22:54:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:54,057 INFO L93 Difference]: Finished difference Result 1733 states and 2953 transitions. [2019-11-06 22:54:54,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:54,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2019-11-06 22:54:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:54,068 INFO L225 Difference]: With dead ends: 1733 [2019-11-06 22:54:54,069 INFO L226 Difference]: Without dead ends: 1057 [2019-11-06 22:54:54,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-11-06 22:54:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1039. [2019-11-06 22:54:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-11-06 22:54:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1701 transitions. [2019-11-06 22:54:54,128 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1701 transitions. Word has length 165 [2019-11-06 22:54:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:54,129 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1701 transitions. [2019-11-06 22:54:54,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1701 transitions. [2019-11-06 22:54:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-06 22:54:54,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:54,133 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:54,133 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:54,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:54,134 INFO L82 PathProgramCache]: Analyzing trace with hash -560455332, now seen corresponding path program 1 times [2019-11-06 22:54:54,134 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:54,134 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782956563] [2019-11-06 22:54:54,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:54,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782956563] [2019-11-06 22:54:54,322 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:54,322 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:54,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985955679] [2019-11-06 22:54:54,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:54,324 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:54,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:54,325 INFO L87 Difference]: Start difference. First operand 1039 states and 1701 transitions. Second operand 6 states. [2019-11-06 22:54:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:57,098 INFO L93 Difference]: Finished difference Result 3130 states and 5158 transitions. [2019-11-06 22:54:57,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:57,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 168 [2019-11-06 22:54:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:57,115 INFO L225 Difference]: With dead ends: 3130 [2019-11-06 22:54:57,116 INFO L226 Difference]: Without dead ends: 2097 [2019-11-06 22:54:57,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2019-11-06 22:54:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2081. [2019-11-06 22:54:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-11-06 22:54:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3125 transitions. [2019-11-06 22:54:57,213 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3125 transitions. Word has length 168 [2019-11-06 22:54:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:57,215 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3125 transitions. [2019-11-06 22:54:57,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3125 transitions. [2019-11-06 22:54:57,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2019-11-06 22:54:57,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:57,228 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:57,228 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:57,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1600135980, now seen corresponding path program 1 times [2019-11-06 22:54:57,229 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:57,229 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280620128] [2019-11-06 22:54:57,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 102 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:57,535 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280620128] [2019-11-06 22:54:57,535 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443921785] [2019-11-06 22:54:57,536 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 22:54:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:57,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:54:57,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-06 22:54:57,912 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 102 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:58,120 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:54:58,120 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:54:58,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349189023] [2019-11-06 22:54:58,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:54:58,124 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:58,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:54:58,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:54:58,126 INFO L87 Difference]: Start difference. First operand 2081 states and 3125 transitions. Second operand 5 states. [2019-11-06 22:55:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:01,123 INFO L93 Difference]: Finished difference Result 6247 states and 9508 transitions. [2019-11-06 22:55:01,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:01,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 283 [2019-11-06 22:55:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:01,147 INFO L225 Difference]: With dead ends: 6247 [2019-11-06 22:55:01,148 INFO L226 Difference]: Without dead ends: 4172 [2019-11-06 22:55:01,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 561 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:55:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2019-11-06 22:55:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3821. [2019-11-06 22:55:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2019-11-06 22:55:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5206 transitions. [2019-11-06 22:55:01,261 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5206 transitions. Word has length 283 [2019-11-06 22:55:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:01,262 INFO L462 AbstractCegarLoop]: Abstraction has 3821 states and 5206 transitions. [2019-11-06 22:55:01,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5206 transitions. [2019-11-06 22:55:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2019-11-06 22:55:01,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:01,274 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:01,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:01,479 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:01,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1818492551, now seen corresponding path program 1 times [2019-11-06 22:55:01,480 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:01,480 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982538600] [2019-11-06 22:55:01,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 158 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:55:01,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982538600] [2019-11-06 22:55:01,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796173413] [2019-11-06 22:55:01,927 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 22:55:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:02,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:02,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 414 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-06 22:55:02,307 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 255 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 22:55:02,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [362147809] [2019-11-06 22:55:02,575 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 492 [2019-11-06 22:55:02,636 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:02,637 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:55:18,638 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:55:18,640 INFO L272 AbstractInterpreter]: Visited 224 different actions 224 times. Never merged. Never widened. Performed 422 root evaluator evaluations with a maximum evaluation depth of 14. Performed 422 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-11-06 22:55:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:18,644 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates