/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/Problem02_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:33:33,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:33:33,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:33:33,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:33:33,254 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 22:33:33,278 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:33:33,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:33:33,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:33:33,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:33:33,281 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:33:33,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:33:33,281 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:33:33,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:33:33,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:33:33,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:33:33,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:33:33,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:33:33,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:33:33,284 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:33:33,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:33:33,284 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:33:33,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:33:33,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:33:33,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:33:33,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:33:33,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:33:33,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:33:33,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:33:33,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:33:33,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:33:33,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:33:33,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:33:33,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:33:33,287 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 22:33:33,553 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:33:33,564 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:33:33,567 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:33:33,569 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:33:33,569 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:33:33,570 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2019-11-06 22:33:33,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d35204397/f68ac429f9bf4fc3938d84821e2dbe87/FLAG88a98f24e [2019-11-06 22:33:34,158 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:33:34,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2019-11-06 22:33:34,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d35204397/f68ac429f9bf4fc3938d84821e2dbe87/FLAG88a98f24e [2019-11-06 22:33:34,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d35204397/f68ac429f9bf4fc3938d84821e2dbe87 [2019-11-06 22:33:34,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:33:34,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:33:34,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:33:34,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:33:34,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:33:34,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:34" (1/1) ... [2019-11-06 22:33:34,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d6db87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:34, skipping insertion in model container [2019-11-06 22:33:34,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:34" (1/1) ... [2019-11-06 22:33:34,539 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:33:34,593 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:33:35,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:33:35,178 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:33:35,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:33:35,322 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:33:35,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:35 WrapperNode [2019-11-06 22:33:35,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:33:35,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:33:35,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:33:35,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:33:35,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:35" (1/1) ... [2019-11-06 22:33:35,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:35" (1/1) ... [2019-11-06 22:33:35,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:35" (1/1) ... [2019-11-06 22:33:35,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:35" (1/1) ... [2019-11-06 22:33:35,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:35" (1/1) ... [2019-11-06 22:33:35,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:35" (1/1) ... [2019-11-06 22:33:35,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:35" (1/1) ... [2019-11-06 22:33:35,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:33:35,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:33:35,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:33:35,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:33:35,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:35" (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 22:33:35,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:33:35,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:33:35,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:33:35,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:33:35,514 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:33:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:33:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:33:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:33:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:33:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:33:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:33:36,687 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:33:36,687 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:33:36,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:36 BoogieIcfgContainer [2019-11-06 22:33:36,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:33:36,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:33:36,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:33:36,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:33:36,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:33:34" (1/3) ... [2019-11-06 22:33:36,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44759aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:36, skipping insertion in model container [2019-11-06 22:33:36,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:35" (2/3) ... [2019-11-06 22:33:36,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44759aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:36, skipping insertion in model container [2019-11-06 22:33:36,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:36" (3/3) ... [2019-11-06 22:33:36,697 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label13.c [2019-11-06 22:33:36,708 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:33:36,717 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:33:36,732 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:33:36,763 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:33:36,764 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:33:36,764 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:33:36,764 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:33:36,764 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:33:36,764 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:33:36,765 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:33:36,765 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:33:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:33:36,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-06 22:33:36,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:36,802 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:36,804 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:36,810 INFO L82 PathProgramCache]: Analyzing trace with hash -807098266, now seen corresponding path program 1 times [2019-11-06 22:33:36,820 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:36,820 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221484438] [2019-11-06 22:33:36,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:37,282 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 22:33:37,283 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221484438] [2019-11-06 22:33:37,285 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:37,285 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:33:37,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300892907] [2019-11-06 22:33:37,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:33:37,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:37,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:33:37,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:33:37,320 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:33:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:38,195 INFO L93 Difference]: Finished difference Result 615 states and 1053 transitions. [2019-11-06 22:33:38,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:33:38,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-11-06 22:33:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:38,213 INFO L225 Difference]: With dead ends: 615 [2019-11-06 22:33:38,214 INFO L226 Difference]: Without dead ends: 317 [2019-11-06 22:33:38,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:33:38,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2019-11-06 22:33:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2019-11-06 22:33:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-06 22:33:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 478 transitions. [2019-11-06 22:33:38,293 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 478 transitions. Word has length 92 [2019-11-06 22:33:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:38,294 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 478 transitions. [2019-11-06 22:33:38,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:33:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 478 transitions. [2019-11-06 22:33:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 22:33:38,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:38,300 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:33:38,300 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:38,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1142863243, now seen corresponding path program 1 times [2019-11-06 22:33:38,301 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:38,301 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196343863] [2019-11-06 22:33:38,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:38,427 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196343863] [2019-11-06 22:33:38,427 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:38,427 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:33:38,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272765749] [2019-11-06 22:33:38,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:33:38,430 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:38,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:33:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:33:38,431 INFO L87 Difference]: Start difference. First operand 317 states and 478 transitions. Second operand 6 states. [2019-11-06 22:33:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:38,869 INFO L93 Difference]: Finished difference Result 625 states and 951 transitions. [2019-11-06 22:33:38,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:33:38,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2019-11-06 22:33:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:38,877 INFO L225 Difference]: With dead ends: 625 [2019-11-06 22:33:38,877 INFO L226 Difference]: Without dead ends: 314 [2019-11-06 22:33:38,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:33:38,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2019-11-06 22:33:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 310. [2019-11-06 22:33:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2019-11-06 22:33:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2019-11-06 22:33:38,903 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 107 [2019-11-06 22:33:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:38,903 INFO L462 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2019-11-06 22:33:38,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:33:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2019-11-06 22:33:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-06 22:33:38,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:38,907 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:33:38,907 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:38,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1161387902, now seen corresponding path program 1 times [2019-11-06 22:33:38,908 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:38,908 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154327593] [2019-11-06 22:33:38,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:39,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154327593] [2019-11-06 22:33:39,000 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:39,000 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:33:39,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741779067] [2019-11-06 22:33:39,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:33:39,002 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:33:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:33:39,002 INFO L87 Difference]: Start difference. First operand 310 states and 437 transitions. Second operand 6 states. [2019-11-06 22:33:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:39,803 INFO L93 Difference]: Finished difference Result 782 states and 1124 transitions. [2019-11-06 22:33:39,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:33:39,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-11-06 22:33:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:39,807 INFO L225 Difference]: With dead ends: 782 [2019-11-06 22:33:39,808 INFO L226 Difference]: Without dead ends: 478 [2019-11-06 22:33:39,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 22:33:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2019-11-06 22:33:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 461. [2019-11-06 22:33:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2019-11-06 22:33:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 632 transitions. [2019-11-06 22:33:39,843 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 632 transitions. Word has length 114 [2019-11-06 22:33:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:39,844 INFO L462 AbstractCegarLoop]: Abstraction has 461 states and 632 transitions. [2019-11-06 22:33:39,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:33:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 632 transitions. [2019-11-06 22:33:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 22:33:39,850 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:39,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:39,850 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:39,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1182299638, now seen corresponding path program 1 times [2019-11-06 22:33:39,853 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:39,853 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588125619] [2019-11-06 22:33:39,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:39,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588125619] [2019-11-06 22:33:39,992 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:33:39,993 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:33:39,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932595678] [2019-11-06 22:33:39,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:33:39,994 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:39,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:33:39,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:33:39,994 INFO L87 Difference]: Start difference. First operand 461 states and 632 transitions. Second operand 3 states. [2019-11-06 22:33:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:40,494 INFO L93 Difference]: Finished difference Result 1212 states and 1675 transitions. [2019-11-06 22:33:40,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:33:40,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-11-06 22:33:40,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:40,503 INFO L225 Difference]: With dead ends: 1212 [2019-11-06 22:33:40,503 INFO L226 Difference]: Without dead ends: 757 [2019-11-06 22:33:40,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:33:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2019-11-06 22:33:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 757. [2019-11-06 22:33:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 757 states. [2019-11-06 22:33:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 964 transitions. [2019-11-06 22:33:40,536 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 964 transitions. Word has length 118 [2019-11-06 22:33:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:40,537 INFO L462 AbstractCegarLoop]: Abstraction has 757 states and 964 transitions. [2019-11-06 22:33:40,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:33:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 964 transitions. [2019-11-06 22:33:40,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 22:33:40,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:40,541 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:33:40,541 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1745080665, now seen corresponding path program 1 times [2019-11-06 22:33:40,542 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:40,542 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277857967] [2019-11-06 22:33:40,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:33:40,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277857967] [2019-11-06 22:33:40,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250319201] [2019-11-06 22:33:40,752 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 22:33:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:40,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:33:40,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:33:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:33:40,985 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:33:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:33:41,055 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:33:41,055 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-06 22:33:41,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581598848] [2019-11-06 22:33:41,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:33:41,056 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:33:41,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:33:41,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:33:41,058 INFO L87 Difference]: Start difference. First operand 757 states and 964 transitions. Second operand 3 states. [2019-11-06 22:33:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:33:41,641 INFO L93 Difference]: Finished difference Result 2089 states and 2696 transitions. [2019-11-06 22:33:41,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:33:41,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2019-11-06 22:33:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:33:41,648 INFO L225 Difference]: With dead ends: 2089 [2019-11-06 22:33:41,648 INFO L226 Difference]: Without dead ends: 1043 [2019-11-06 22:33:41,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 256 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:33:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2019-11-06 22:33:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1043. [2019-11-06 22:33:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1043 states. [2019-11-06 22:33:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1198 transitions. [2019-11-06 22:33:41,685 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1198 transitions. Word has length 127 [2019-11-06 22:33:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:33:41,686 INFO L462 AbstractCegarLoop]: Abstraction has 1043 states and 1198 transitions. [2019-11-06 22:33:41,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:33:41,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1198 transitions. [2019-11-06 22:33:41,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-06 22:33:41,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:33:41,690 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 22:33:41,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:33:41,895 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:33:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:33:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1555662563, now seen corresponding path program 1 times [2019-11-06 22:33:41,896 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:33:41,896 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044758810] [2019-11-06 22:33:41,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:33:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 22:33:41,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044758810] [2019-11-06 22:33:41,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029502992] [2019-11-06 22:33:41,983 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 22:33:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:33:42,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:33:42,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:33:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:33:42,190 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:33:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:33:42,304 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1986971290] [2019-11-06 22:33:42,309 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 164 [2019-11-06 22:33:42,369 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:33:42,370 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)