/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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:55:23,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:55:23,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:55:23,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:55:23,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:55:23,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:55:23,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:55:23,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:55:23,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:55:23,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:55:23,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:55:23,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:55:23,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:55:23,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:55:23,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:55:23,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:55:23,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:55:23,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:55:23,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:55:23,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:55:23,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:55:23,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:55:23,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:55:23,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:55:23,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:55:23,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:55:23,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:55:23,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:55:23,220 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 22:55:23,243 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:55:23,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:55:23,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:55:23,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:55:23,245 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:55:23,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:55:23,245 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:55:23,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:55:23,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:55:23,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:55:23,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:55:23,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:55:23,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:55:23,246 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:55:23,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:55:23,251 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:55:23,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:55:23,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:55:23,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:55:23,254 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:55:23,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:55:23,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:55:23,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:55:23,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:55:23,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:55:23,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:55:23,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:55:23,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:55:23,258 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 22:55:23,556 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:55:23,579 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:55:23,582 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:55:23,584 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:55:23,584 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:55:23,585 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-11-06 22:55:23,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/575fda050/b82c7514a22e4928b7685dcc822a737b/FLAG9c25ec885 [2019-11-06 22:55:24,321 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:55:24,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-11-06 22:55:24,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/575fda050/b82c7514a22e4928b7685dcc822a737b/FLAG9c25ec885 [2019-11-06 22:55:24,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/575fda050/b82c7514a22e4928b7685dcc822a737b [2019-11-06 22:55:24,516 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:55:24,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:55:24,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:24,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:55:24,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:55:24,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:24" (1/1) ... [2019-11-06 22:55:24,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b8ae619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:24, skipping insertion in model container [2019-11-06 22:55:24,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:24" (1/1) ... [2019-11-06 22:55:24,534 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:55:24,617 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:55:25,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:25,426 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:55:25,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:25,683 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:55:25,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:25 WrapperNode [2019-11-06 22:55:25,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:25,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:55:25,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:55:25,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:55:25,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:25" (1/1) ... [2019-11-06 22:55:25,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:25" (1/1) ... [2019-11-06 22:55:25,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:25" (1/1) ... [2019-11-06 22:55:25,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:25" (1/1) ... [2019-11-06 22:55:25,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:25" (1/1) ... [2019-11-06 22:55:25,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:25" (1/1) ... [2019-11-06 22:55:25,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:25" (1/1) ... [2019-11-06 22:55:25,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:55:25,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:55:25,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:55:25,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:55:25,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:25" (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 22:55:25,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:55:25,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:55:25,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:55:25,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:55:25,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:55:25,912 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:55:25,913 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:55:25,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:55:25,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:55:25,913 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:55:25,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:55:25,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:55:25,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:55:28,553 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:55:28,553 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:55:28,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:28 BoogieIcfgContainer [2019-11-06 22:55:28,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:55:28,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:55:28,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:55:28,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:55:28,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:24" (1/3) ... [2019-11-06 22:55:28,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2199832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:28, skipping insertion in model container [2019-11-06 22:55:28,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:25" (2/3) ... [2019-11-06 22:55:28,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2199832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:28, skipping insertion in model container [2019-11-06 22:55:28,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:28" (3/3) ... [2019-11-06 22:55:28,570 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label39.c [2019-11-06 22:55:28,582 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:55:28,592 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:55:28,604 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:55:28,648 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:55:28,649 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:55:28,649 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:55:28,649 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:55:28,649 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:55:28,649 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:55:28,649 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:55:28,650 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:55:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:55:28,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 22:55:28,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:28,712 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] [2019-11-06 22:55:28,714 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:28,720 INFO L82 PathProgramCache]: Analyzing trace with hash 697070738, now seen corresponding path program 1 times [2019-11-06 22:55:28,727 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:28,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199467110] [2019-11-06 22:55:28,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:29,052 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 22:55:29,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199467110] [2019-11-06 22:55:29,054 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:29,054 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:55:29,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057475978] [2019-11-06 22:55:29,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:55:29,063 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:29,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:55:29,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:55:29,080 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-11-06 22:55:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:34,809 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-11-06 22:55:34,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:55:34,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-11-06 22:55:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:34,853 INFO L225 Difference]: With dead ends: 1509 [2019-11-06 22:55:34,853 INFO L226 Difference]: Without dead ends: 1019 [2019-11-06 22:55:34,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:55:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-11-06 22:55:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 682. [2019-11-06 22:55:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:55:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-11-06 22:55:34,977 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 55 [2019-11-06 22:55:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:34,978 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-11-06 22:55:34,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:55:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-11-06 22:55:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:55:34,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:34,985 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, 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 22:55:34,985 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:34,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1449951553, now seen corresponding path program 1 times [2019-11-06 22:55:34,986 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:34,986 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057543409] [2019-11-06 22:55:34,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:35,215 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057543409] [2019-11-06 22:55:35,215 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:35,215 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:55:35,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982798351] [2019-11-06 22:55:35,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:35,223 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:35,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:35,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:55:35,224 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 5 states. [2019-11-06 22:55:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:37,955 INFO L93 Difference]: Finished difference Result 2068 states and 3645 transitions. [2019-11-06 22:55:37,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:37,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-11-06 22:55:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:37,970 INFO L225 Difference]: With dead ends: 2068 [2019-11-06 22:55:37,970 INFO L226 Difference]: Without dead ends: 1392 [2019-11-06 22:55:37,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:55:37,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2019-11-06 22:55:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1374. [2019-11-06 22:55:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2019-11-06 22:55:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2277 transitions. [2019-11-06 22:55:38,072 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2277 transitions. Word has length 124 [2019-11-06 22:55:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:38,075 INFO L462 AbstractCegarLoop]: Abstraction has 1374 states and 2277 transitions. [2019-11-06 22:55:38,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2277 transitions. [2019-11-06 22:55:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 22:55:38,090 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:38,090 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, 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 22:55:38,093 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:38,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1240041174, now seen corresponding path program 1 times [2019-11-06 22:55:38,094 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:38,094 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084089857] [2019-11-06 22:55:38,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:38,309 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084089857] [2019-11-06 22:55:38,310 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:38,310 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:38,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727908165] [2019-11-06 22:55:38,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:38,313 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:38,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:38,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:38,314 INFO L87 Difference]: Start difference. First operand 1374 states and 2277 transitions. Second operand 6 states. [2019-11-06 22:55:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:41,218 INFO L93 Difference]: Finished difference Result 3463 states and 5746 transitions. [2019-11-06 22:55:41,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:41,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-11-06 22:55:41,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:41,237 INFO L225 Difference]: With dead ends: 3463 [2019-11-06 22:55:41,237 INFO L226 Difference]: Without dead ends: 2095 [2019-11-06 22:55:41,242 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 22:55:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2019-11-06 22:55:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2077. [2019-11-06 22:55:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-11-06 22:55:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3297 transitions. [2019-11-06 22:55:41,382 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3297 transitions. Word has length 127 [2019-11-06 22:55:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:41,383 INFO L462 AbstractCegarLoop]: Abstraction has 2077 states and 3297 transitions. [2019-11-06 22:55:41,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3297 transitions. [2019-11-06 22:55:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-06 22:55:41,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:41,392 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, 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] [2019-11-06 22:55:41,392 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:41,393 INFO L82 PathProgramCache]: Analyzing trace with hash 164482690, now seen corresponding path program 1 times [2019-11-06 22:55:41,393 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:41,393 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490612127] [2019-11-06 22:55:41,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 96 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:41,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490612127] [2019-11-06 22:55:41,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963816273] [2019-11-06 22:55:41,650 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 22:55:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:41,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:55:41,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-06 22:55:41,909 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 96 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:42,114 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:55:42,115 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:55:42,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783977519] [2019-11-06 22:55:42,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:42,116 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:42,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:42,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:55:42,117 INFO L87 Difference]: Start difference. First operand 2077 states and 3297 transitions. Second operand 5 states. [2019-11-06 22:55:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:44,966 INFO L93 Difference]: Finished difference Result 5903 states and 9548 transitions. [2019-11-06 22:55:44,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:44,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2019-11-06 22:55:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:44,995 INFO L225 Difference]: With dead ends: 5903 [2019-11-06 22:55:44,995 INFO L226 Difference]: Without dead ends: 3832 [2019-11-06 22:55:45,000 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 434 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:55:45,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2019-11-06 22:55:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 3816. [2019-11-06 22:55:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3816 states. [2019-11-06 22:55:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 5487 transitions. [2019-11-06 22:55:45,110 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 5487 transitions. Word has length 219 [2019-11-06 22:55:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:45,111 INFO L462 AbstractCegarLoop]: Abstraction has 3816 states and 5487 transitions. [2019-11-06 22:55:45,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 5487 transitions. [2019-11-06 22:55:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-11-06 22:55:45,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:45,119 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:45,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:45,325 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:45,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:45,326 INFO L82 PathProgramCache]: Analyzing trace with hash -402850069, now seen corresponding path program 1 times [2019-11-06 22:55:45,326 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:45,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064512920] [2019-11-06 22:55:45,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 144 proven. 147 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 22:55:45,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064512920] [2019-11-06 22:55:45,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067692549] [2019-11-06 22:55:45,517 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 22:55:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:45,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:55:45,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2019-11-06 22:55:45,794 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 144 proven. 147 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 22:55:45,927 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:55:45,927 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-11-06 22:55:45,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073074757] [2019-11-06 22:55:45,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:45,928 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:45,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:45,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:55:45,929 INFO L87 Difference]: Start difference. First operand 3816 states and 5487 transitions. Second operand 5 states. [2019-11-06 22:55:48,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:48,695 INFO L93 Difference]: Finished difference Result 8700 states and 12728 transitions. [2019-11-06 22:55:48,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:55:48,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 302 [2019-11-06 22:55:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:48,731 INFO L225 Difference]: With dead ends: 8700 [2019-11-06 22:55:48,731 INFO L226 Difference]: Without dead ends: 4890 [2019-11-06 22:55:48,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 599 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:55:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4890 states. [2019-11-06 22:55:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4890 to 4855. [2019-11-06 22:55:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4855 states. [2019-11-06 22:55:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4855 states to 4855 states and 6423 transitions. [2019-11-06 22:55:48,879 INFO L78 Accepts]: Start accepts. Automaton has 4855 states and 6423 transitions. Word has length 302 [2019-11-06 22:55:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:48,881 INFO L462 AbstractCegarLoop]: Abstraction has 4855 states and 6423 transitions. [2019-11-06 22:55:48,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4855 states and 6423 transitions. [2019-11-06 22:55:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2019-11-06 22:55:48,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:48,891 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:49,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:49,095 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:49,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:49,096 INFO L82 PathProgramCache]: Analyzing trace with hash -901742510, now seen corresponding path program 1 times [2019-11-06 22:55:49,096 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:49,097 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624867581] [2019-11-06 22:55:49,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 201 proven. 316 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-06 22:55:49,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624867581] [2019-11-06 22:55:49,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282435169] [2019-11-06 22:55:49,397 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 22:55:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:49,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:49,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 493 proven. 2 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2019-11-06 22:55:49,656 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 281 proven. 153 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-06 22:55:49,885 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1953181269] [2019-11-06 22:55:49,890 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 394 [2019-11-06 22:55:49,950 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:49,951 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:55:54,662 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-11-06 22:55:56,994 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:55:56,997 INFO L272 AbstractInterpreter]: Visited 102 different actions 199 times. Merged at 4 different actions 5 times. Never widened. Performed 456 root evaluator evaluations with a maximum evaluation depth of 14. Performed 456 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-11-06 22:55:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:57,001 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates