/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/Problem11_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:47:33,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:47:33,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:47:33,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:47:33,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:47:33,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:47:33,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:47:33,805 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 22:47:33,819 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:47:33,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:47:33,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:47:33,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:47:33,821 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:47:33,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:47:33,821 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:47:33,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:47:33,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:47:33,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:47:33,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:47:33,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:47:33,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:47:33,823 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:47:33,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:47:33,823 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:47:33,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:47:33,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:47:33,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:47:33,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:47:33,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:47:33,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:47:33,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:47:33,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:47:33,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:47:33,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:47:33,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:47:33,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:47:33,826 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 22:47:34,136 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:47:34,159 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:47:34,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:47:34,164 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:47:34,164 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:47:34,165 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label47.c [2019-11-06 22:47:34,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ca8068a/c0ddcbc0a2d74930bfdaa6346e5205f6/FLAG17ffaed04 [2019-11-06 22:47:34,890 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:47:34,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label47.c [2019-11-06 22:47:34,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ca8068a/c0ddcbc0a2d74930bfdaa6346e5205f6/FLAG17ffaed04 [2019-11-06 22:47:35,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ca8068a/c0ddcbc0a2d74930bfdaa6346e5205f6 [2019-11-06 22:47:35,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:47:35,087 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:47:35,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:35,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:47:35,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:47:35,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:35" (1/1) ... [2019-11-06 22:47:35,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f18902e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:35, skipping insertion in model container [2019-11-06 22:47:35,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:35" (1/1) ... [2019-11-06 22:47:35,106 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:47:35,180 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:47:35,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:35,886 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:47:36,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:36,071 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:47:36,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36 WrapperNode [2019-11-06 22:47:36,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:36,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:47:36,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:47:36,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:47:36,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36" (1/1) ... [2019-11-06 22:47:36,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36" (1/1) ... [2019-11-06 22:47:36,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36" (1/1) ... [2019-11-06 22:47:36,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36" (1/1) ... [2019-11-06 22:47:36,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36" (1/1) ... [2019-11-06 22:47:36,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36" (1/1) ... [2019-11-06 22:47:36,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36" (1/1) ... [2019-11-06 22:47:36,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:47:36,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:47:36,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:47:36,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:47:36,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36" (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 22:47:36,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:47:36,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:47:36,302 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:47:36,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:47:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:47:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:47:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:47:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:47:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:47:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:47:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:47:38,120 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:47:38,121 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:47:38,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:38 BoogieIcfgContainer [2019-11-06 22:47:38,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:47:38,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:47:38,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:47:38,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:47:38,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:35" (1/3) ... [2019-11-06 22:47:38,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60699df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:38, skipping insertion in model container [2019-11-06 22:47:38,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36" (2/3) ... [2019-11-06 22:47:38,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60699df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:38, skipping insertion in model container [2019-11-06 22:47:38,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:38" (3/3) ... [2019-11-06 22:47:38,132 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label47.c [2019-11-06 22:47:38,142 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:47:38,150 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:47:38,162 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:47:38,192 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:47:38,192 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:47:38,193 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:47:38,193 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:47:38,193 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:47:38,193 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:47:38,193 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:47:38,194 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:47:38,221 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:47:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 22:47:38,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:38,231 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] [2019-11-06 22:47:38,233 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:38,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1102823458, now seen corresponding path program 1 times [2019-11-06 22:47:38,250 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:38,251 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44662012] [2019-11-06 22:47:38,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:38,615 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 22:47:38,615 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44662012] [2019-11-06 22:47:38,616 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:38,617 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:47:38,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128393343] [2019-11-06 22:47:38,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:47:38,627 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:38,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:47:38,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:47:38,645 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-11-06 22:47:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:40,148 INFO L93 Difference]: Finished difference Result 787 states and 1379 transitions. [2019-11-06 22:47:40,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:47:40,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-11-06 22:47:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:40,171 INFO L225 Difference]: With dead ends: 787 [2019-11-06 22:47:40,171 INFO L226 Difference]: Without dead ends: 433 [2019-11-06 22:47:40,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 22:47:40,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2019-11-06 22:47:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 426. [2019-11-06 22:47:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-11-06 22:47:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 678 transitions. [2019-11-06 22:47:40,274 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 678 transitions. Word has length 41 [2019-11-06 22:47:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:40,275 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 678 transitions. [2019-11-06 22:47:40,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:47:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 678 transitions. [2019-11-06 22:47:40,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 22:47:40,281 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:40,281 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:40,282 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:40,282 INFO L82 PathProgramCache]: Analyzing trace with hash -659313835, now seen corresponding path program 1 times [2019-11-06 22:47:40,282 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:40,283 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369043646] [2019-11-06 22:47:40,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:40,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369043646] [2019-11-06 22:47:40,527 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:40,527 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:47:40,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368602112] [2019-11-06 22:47:40,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:47:40,530 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:47:40,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:47:40,531 INFO L87 Difference]: Start difference. First operand 426 states and 678 transitions. Second operand 5 states. [2019-11-06 22:47:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:42,236 INFO L93 Difference]: Finished difference Result 1259 states and 2034 transitions. [2019-11-06 22:47:42,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:47:42,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2019-11-06 22:47:42,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:42,244 INFO L225 Difference]: With dead ends: 1259 [2019-11-06 22:47:42,245 INFO L226 Difference]: Without dead ends: 839 [2019-11-06 22:47:42,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 22:47:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-11-06 22:47:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 627. [2019-11-06 22:47:42,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-11-06 22:47:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 934 transitions. [2019-11-06 22:47:42,300 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 934 transitions. Word has length 116 [2019-11-06 22:47:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:42,301 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 934 transitions. [2019-11-06 22:47:42,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:47:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 934 transitions. [2019-11-06 22:47:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 22:47:42,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:42,308 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:42,308 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:42,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:42,327 INFO L82 PathProgramCache]: Analyzing trace with hash -548845122, now seen corresponding path program 1 times [2019-11-06 22:47:42,327 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:42,327 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474411126] [2019-11-06 22:47:42,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:42,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474411126] [2019-11-06 22:47:42,503 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:42,503 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:47:42,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668648498] [2019-11-06 22:47:42,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:47:42,504 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:42,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:47:42,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:47:42,505 INFO L87 Difference]: Start difference. First operand 627 states and 934 transitions. Second operand 5 states. [2019-11-06 22:47:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:44,331 INFO L93 Difference]: Finished difference Result 1872 states and 2846 transitions. [2019-11-06 22:47:44,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:47:44,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2019-11-06 22:47:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:44,340 INFO L225 Difference]: With dead ends: 1872 [2019-11-06 22:47:44,340 INFO L226 Difference]: Without dead ends: 1251 [2019-11-06 22:47:44,342 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 22:47:44,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-11-06 22:47:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1032. [2019-11-06 22:47:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-11-06 22:47:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1433 transitions. [2019-11-06 22:47:44,391 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1433 transitions. Word has length 127 [2019-11-06 22:47:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:44,401 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1433 transitions. [2019-11-06 22:47:44,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:47:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1433 transitions. [2019-11-06 22:47:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-06 22:47:44,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:44,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:44,416 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:44,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1324114650, now seen corresponding path program 1 times [2019-11-06 22:47:44,419 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:44,419 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215086281] [2019-11-06 22:47:44,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:44,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215086281] [2019-11-06 22:47:44,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464907636] [2019-11-06 22:47:44,764 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 22:47:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:44,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:47:44,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:45,053 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:45,141 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:47:45,141 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-06 22:47:45,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811052780] [2019-11-06 22:47:45,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:47:45,142 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:45,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:47:45,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:47:45,143 INFO L87 Difference]: Start difference. First operand 1032 states and 1433 transitions. Second operand 3 states. [2019-11-06 22:47:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:46,395 INFO L93 Difference]: Finished difference Result 2662 states and 3820 transitions. [2019-11-06 22:47:46,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:47:46,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2019-11-06 22:47:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:46,404 INFO L225 Difference]: With dead ends: 2662 [2019-11-06 22:47:46,404 INFO L226 Difference]: Without dead ends: 1636 [2019-11-06 22:47:46,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 344 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:47:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2019-11-06 22:47:46,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1629. [2019-11-06 22:47:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2019-11-06 22:47:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2257 transitions. [2019-11-06 22:47:46,450 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2257 transitions. Word has length 172 [2019-11-06 22:47:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:46,450 INFO L462 AbstractCegarLoop]: Abstraction has 1629 states and 2257 transitions. [2019-11-06 22:47:46,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:47:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2257 transitions. [2019-11-06 22:47:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-06 22:47:46,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:46,455 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, 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] [2019-11-06 22:47:46,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:46,662 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1322201221, now seen corresponding path program 1 times [2019-11-06 22:47:46,663 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:46,663 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386794819] [2019-11-06 22:47:46,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 68 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:47:46,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386794819] [2019-11-06 22:47:46,837 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946484133] [2019-11-06 22:47:46,837 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 22:47:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:46,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:47:46,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 22:47:47,004 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 68 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:47:47,146 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:47:47,147 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:47:47,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059516774] [2019-11-06 22:47:47,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:47:47,148 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:47:47,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:47:47,148 INFO L87 Difference]: Start difference. First operand 1629 states and 2257 transitions. Second operand 5 states. [2019-11-06 22:47:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:48,711 INFO L93 Difference]: Finished difference Result 4500 states and 6394 transitions. [2019-11-06 22:47:48,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:47:48,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2019-11-06 22:47:48,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:48,728 INFO L225 Difference]: With dead ends: 4500 [2019-11-06 22:47:48,728 INFO L226 Difference]: Without dead ends: 2877 [2019-11-06 22:47:48,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:47:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2019-11-06 22:47:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2825. [2019-11-06 22:47:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2019-11-06 22:47:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3849 transitions. [2019-11-06 22:47:48,820 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3849 transitions. Word has length 196 [2019-11-06 22:47:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:48,821 INFO L462 AbstractCegarLoop]: Abstraction has 2825 states and 3849 transitions. [2019-11-06 22:47:48,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:47:48,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3849 transitions. [2019-11-06 22:47:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-11-06 22:47:48,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:48,826 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, 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] [2019-11-06 22:47:49,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:49,030 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash 951446006, now seen corresponding path program 1 times [2019-11-06 22:47:49,031 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:49,031 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786584506] [2019-11-06 22:47:49,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:49,196 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786584506] [2019-11-06 22:47:49,196 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721270851] [2019-11-06 22:47:49,197 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 22:47:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:49,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:47:49,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:47:49,345 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:47:49,407 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:47:49,408 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-11-06 22:47:49,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447120185] [2019-11-06 22:47:49,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:49,409 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:49,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:49,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:47:49,410 INFO L87 Difference]: Start difference. First operand 2825 states and 3849 transitions. Second operand 4 states. [2019-11-06 22:47:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:51,214 INFO L93 Difference]: Finished difference Result 8893 states and 12908 transitions. [2019-11-06 22:47:51,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:51,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 197 [2019-11-06 22:47:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:51,249 INFO L225 Difference]: With dead ends: 8893 [2019-11-06 22:47:51,249 INFO L226 Difference]: Without dead ends: 6262 [2019-11-06 22:47:51,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:47:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6262 states. [2019-11-06 22:47:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6262 to 6260. [2019-11-06 22:47:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6260 states. [2019-11-06 22:47:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 8575 transitions. [2019-11-06 22:47:51,423 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 8575 transitions. Word has length 197 [2019-11-06 22:47:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:51,424 INFO L462 AbstractCegarLoop]: Abstraction has 6260 states and 8575 transitions. [2019-11-06 22:47:51,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 8575 transitions. [2019-11-06 22:47:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-11-06 22:47:51,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:51,433 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, 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, 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] [2019-11-06 22:47:51,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:51,637 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash -694803308, now seen corresponding path program 1 times [2019-11-06 22:47:51,637 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:51,638 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696824992] [2019-11-06 22:47:51,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 22:47:51,802 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696824992] [2019-11-06 22:47:51,802 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:51,802 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:47:51,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705144903] [2019-11-06 22:47:51,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:47:51,803 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:47:51,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:47:51,804 INFO L87 Difference]: Start difference. First operand 6260 states and 8575 transitions. Second operand 3 states. [2019-11-06 22:47:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:52,820 INFO L93 Difference]: Finished difference Result 13085 states and 18325 transitions. [2019-11-06 22:47:52,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:47:52,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2019-11-06 22:47:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:52,852 INFO L225 Difference]: With dead ends: 13085 [2019-11-06 22:47:52,852 INFO L226 Difference]: Without dead ends: 7019 [2019-11-06 22:47:52,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 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 22:47:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7019 states. [2019-11-06 22:47:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7019 to 7017. [2019-11-06 22:47:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7017 states. [2019-11-06 22:47:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 9616 transitions. [2019-11-06 22:47:53,065 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 9616 transitions. Word has length 251 [2019-11-06 22:47:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:53,066 INFO L462 AbstractCegarLoop]: Abstraction has 7017 states and 9616 transitions. [2019-11-06 22:47:53,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:47:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 9616 transitions. [2019-11-06 22:47:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-11-06 22:47:53,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:53,082 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:53,082 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash -165869244, now seen corresponding path program 1 times [2019-11-06 22:47:53,083 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:53,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591305217] [2019-11-06 22:47:53,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:53,414 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591305217] [2019-11-06 22:47:53,415 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202767424] [2019-11-06 22:47:53,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:53,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:47:53,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 22:47:53,599 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 22:47:53,686 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:47:53,686 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-11-06 22:47:53,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244745108] [2019-11-06 22:47:53,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:53,743 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:53,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:53,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:47:53,744 INFO L87 Difference]: Start difference. First operand 7017 states and 9616 transitions. Second operand 4 states. [2019-11-06 22:47:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:55,478 INFO L93 Difference]: Finished difference Result 17286 states and 24236 transitions. [2019-11-06 22:47:55,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:55,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 262 [2019-11-06 22:47:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:55,545 INFO L225 Difference]: With dead ends: 17286 [2019-11-06 22:47:55,545 INFO L226 Difference]: Without dead ends: 10463 [2019-11-06 22:47:55,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:47:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2019-11-06 22:47:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 10244. [2019-11-06 22:47:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10244 states. [2019-11-06 22:47:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10244 states to 10244 states and 13884 transitions. [2019-11-06 22:47:55,821 INFO L78 Accepts]: Start accepts. Automaton has 10244 states and 13884 transitions. Word has length 262 [2019-11-06 22:47:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:55,821 INFO L462 AbstractCegarLoop]: Abstraction has 10244 states and 13884 transitions. [2019-11-06 22:47:55,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 10244 states and 13884 transitions. [2019-11-06 22:47:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-11-06 22:47:55,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:55,845 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, 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, 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] [2019-11-06 22:47:56,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:56,057 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:56,057 INFO L82 PathProgramCache]: Analyzing trace with hash -909757423, now seen corresponding path program 1 times [2019-11-06 22:47:56,058 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:56,058 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558654870] [2019-11-06 22:47:56,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 144 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:56,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558654870] [2019-11-06 22:47:56,412 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043314017] [2019-11-06 22:47:56,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:56,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:47:56,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:56,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 22:47:56,704 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:56,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:56,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:56,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:56,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:56,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:56,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:56,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 68 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:47:57,229 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:47:57,229 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2019-11-06 22:47:57,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062708495] [2019-11-06 22:47:57,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:47:57,230 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:47:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:47:57,231 INFO L87 Difference]: Start difference. First operand 10244 states and 13884 transitions. Second operand 5 states. [2019-11-06 22:47:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:58,739 INFO L93 Difference]: Finished difference Result 20379 states and 27815 transitions. [2019-11-06 22:47:58,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:47:58,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 316 [2019-11-06 22:47:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:58,778 INFO L225 Difference]: With dead ends: 20379 [2019-11-06 22:47:58,778 INFO L226 Difference]: Without dead ends: 10329 [2019-11-06 22:47:58,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 628 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:47:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2019-11-06 22:47:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 9554. [2019-11-06 22:47:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9554 states. [2019-11-06 22:47:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9554 states to 9554 states and 13049 transitions. [2019-11-06 22:47:59,117 INFO L78 Accepts]: Start accepts. Automaton has 9554 states and 13049 transitions. Word has length 316 [2019-11-06 22:47:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:59,118 INFO L462 AbstractCegarLoop]: Abstraction has 9554 states and 13049 transitions. [2019-11-06 22:47:59,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:47:59,118 INFO L276 IsEmpty]: Start isEmpty. Operand 9554 states and 13049 transitions. [2019-11-06 22:47:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2019-11-06 22:47:59,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:59,137 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, 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, 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] [2019-11-06 22:47:59,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:59,342 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:59,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1210048352, now seen corresponding path program 1 times [2019-11-06 22:47:59,343 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:59,343 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212656214] [2019-11-06 22:47:59,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:00,159 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212656214] [2019-11-06 22:48:00,159 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106769313] [2019-11-06 22:48:00,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:48:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:00,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 22:48:00,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:48:00,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:00,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:00,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:00,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:01,432 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:48:01,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:01,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:01,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:01,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:01,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:02,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [527800893] [2019-11-06 22:48:02,410 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 324 [2019-11-06 22:48:02,460 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:48:02,461 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)