/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_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:36:01,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:36:01,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:36:01,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:36:01,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:36:01,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:36:01,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:36:01,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:36:01,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:36:01,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:36:01,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:36:01,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:36:01,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:36:01,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:36:01,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:36:01,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:36:01,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:36:01,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:36:01,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:36:01,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:36:01,181 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 22:36:01,194 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:36:01,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:36:01,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:36:01,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:36:01,195 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:36:01,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:36:01,196 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:36:01,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:36:01,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:36:01,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:36:01,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:36:01,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:36:01,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:36:01,197 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:36:01,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:36:01,197 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:36:01,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:36:01,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:36:01,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:36:01,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:36:01,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:36:01,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:36:01,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:36:01,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:36:01,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:36:01,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:36:01,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:36:01,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:36:01,200 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 22:36:01,453 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:36:01,472 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:36:01,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:36:01,475 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:36:01,475 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:36:01,476 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label45.c [2019-11-06 22:36:01,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4466032c5/96288e9325f04a839850577ca7adb021/FLAGac51e23bc [2019-11-06 22:36:02,060 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:36:02,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label45.c [2019-11-06 22:36:02,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4466032c5/96288e9325f04a839850577ca7adb021/FLAGac51e23bc [2019-11-06 22:36:02,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4466032c5/96288e9325f04a839850577ca7adb021 [2019-11-06 22:36:02,361 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:36:02,362 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:36:02,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:02,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:36:02,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:36:02,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:02" (1/1) ... [2019-11-06 22:36:02,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d04c9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:02, skipping insertion in model container [2019-11-06 22:36:02,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:02" (1/1) ... [2019-11-06 22:36:02,383 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:36:02,447 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:36:02,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:02,996 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:36:03,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:03,139 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:36:03,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:03 WrapperNode [2019-11-06 22:36:03,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:03,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:36:03,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:36:03,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:36:03,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:03" (1/1) ... [2019-11-06 22:36:03,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:03" (1/1) ... [2019-11-06 22:36:03,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:03" (1/1) ... [2019-11-06 22:36:03,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:03" (1/1) ... [2019-11-06 22:36:03,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:03" (1/1) ... [2019-11-06 22:36:03,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:03" (1/1) ... [2019-11-06 22:36:03,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:03" (1/1) ... [2019-11-06 22:36:03,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:36:03,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:36:03,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:36:03,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:36:03,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:03" (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 22:36:03,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:36:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:36:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:36:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:36:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:36:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:36:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:36:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:36:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:36:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:36:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:36:04,467 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:36:04,468 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:36:04,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:04 BoogieIcfgContainer [2019-11-06 22:36:04,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:36:04,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:36:04,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:36:04,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:36:04,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:36:02" (1/3) ... [2019-11-06 22:36:04,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7568cac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:04, skipping insertion in model container [2019-11-06 22:36:04,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:03" (2/3) ... [2019-11-06 22:36:04,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7568cac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:04, skipping insertion in model container [2019-11-06 22:36:04,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:04" (3/3) ... [2019-11-06 22:36:04,480 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label45.c [2019-11-06 22:36:04,490 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:36:04,499 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:36:04,511 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:36:04,545 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:36:04,546 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:36:04,546 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:36:04,546 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:36:04,546 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:36:04,547 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:36:04,547 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:36:04,547 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:36:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:36:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:36:04,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:04,601 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] [2019-11-06 22:36:04,605 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:04,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:04,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1702778474, now seen corresponding path program 1 times [2019-11-06 22:36:04,622 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:04,623 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3337722] [2019-11-06 22:36:04,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:05,039 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 22:36:05,040 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3337722] [2019-11-06 22:36:05,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:05,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:36:05,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285192517] [2019-11-06 22:36:05,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:05,050 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:05,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:05,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:36:05,067 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:36:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:05,964 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-11-06 22:36:05,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:36:05,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-11-06 22:36:05,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:06,000 INFO L225 Difference]: With dead ends: 618 [2019-11-06 22:36:06,000 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:36:06,014 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 22:36:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:36:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-11-06 22:36:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-11-06 22:36:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-11-06 22:36:06,094 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 88 [2019-11-06 22:36:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:06,095 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-11-06 22:36:06,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:36:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-11-06 22:36:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-06 22:36:06,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:06,101 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:36:06,102 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:06,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:06,102 INFO L82 PathProgramCache]: Analyzing trace with hash 302411185, now seen corresponding path program 1 times [2019-11-06 22:36:06,103 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:06,103 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560971468] [2019-11-06 22:36:06,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:06,213 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560971468] [2019-11-06 22:36:06,214 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:06,214 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:36:06,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215371926] [2019-11-06 22:36:06,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:36:06,216 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:06,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:36:06,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:36:06,217 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 4 states. [2019-11-06 22:36:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:07,180 INFO L93 Difference]: Finished difference Result 1216 states and 1816 transitions. [2019-11-06 22:36:07,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:36:07,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-11-06 22:36:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:07,187 INFO L225 Difference]: With dead ends: 1216 [2019-11-06 22:36:07,187 INFO L226 Difference]: Without dead ends: 902 [2019-11-06 22:36:07,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:36:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2019-11-06 22:36:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 899. [2019-11-06 22:36:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-11-06 22:36:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1231 transitions. [2019-11-06 22:36:07,243 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1231 transitions. Word has length 96 [2019-11-06 22:36:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:07,244 INFO L462 AbstractCegarLoop]: Abstraction has 899 states and 1231 transitions. [2019-11-06 22:36:07,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:36:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1231 transitions. [2019-11-06 22:36:07,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 22:36:07,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:07,254 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] [2019-11-06 22:36:07,254 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash 574467246, now seen corresponding path program 1 times [2019-11-06 22:36:07,255 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:07,255 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047956276] [2019-11-06 22:36:07,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:07,352 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 22:36:07,353 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047956276] [2019-11-06 22:36:07,353 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:07,353 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:07,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681036123] [2019-11-06 22:36:07,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:07,354 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:07,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:07,355 INFO L87 Difference]: Start difference. First operand 899 states and 1231 transitions. Second operand 6 states. [2019-11-06 22:36:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:08,242 INFO L93 Difference]: Finished difference Result 2122 states and 3001 transitions. [2019-11-06 22:36:08,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:36:08,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-11-06 22:36:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:08,258 INFO L225 Difference]: With dead ends: 2122 [2019-11-06 22:36:08,259 INFO L226 Difference]: Without dead ends: 1229 [2019-11-06 22:36:08,265 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 22:36:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2019-11-06 22:36:08,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1211. [2019-11-06 22:36:08,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2019-11-06 22:36:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1651 transitions. [2019-11-06 22:36:08,361 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1651 transitions. Word has length 110 [2019-11-06 22:36:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:08,371 INFO L462 AbstractCegarLoop]: Abstraction has 1211 states and 1651 transitions. [2019-11-06 22:36:08,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:08,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1651 transitions. [2019-11-06 22:36:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 22:36:08,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:08,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:36:08,385 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:08,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:08,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1937402390, now seen corresponding path program 1 times [2019-11-06 22:36:08,387 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:08,387 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104148554] [2019-11-06 22:36:08,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:08,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104148554] [2019-11-06 22:36:08,625 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:08,625 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:08,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8286118] [2019-11-06 22:36:08,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:08,626 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:08,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:08,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:08,627 INFO L87 Difference]: Start difference. First operand 1211 states and 1651 transitions. Second operand 6 states. [2019-11-06 22:36:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:09,508 INFO L93 Difference]: Finished difference Result 2777 states and 3976 transitions. [2019-11-06 22:36:09,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:36:09,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2019-11-06 22:36:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:09,525 INFO L225 Difference]: With dead ends: 2777 [2019-11-06 22:36:09,525 INFO L226 Difference]: Without dead ends: 1572 [2019-11-06 22:36:09,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:36:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2019-11-06 22:36:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1539. [2019-11-06 22:36:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1539 states. [2019-11-06 22:36:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1952 transitions. [2019-11-06 22:36:09,594 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1952 transitions. Word has length 112 [2019-11-06 22:36:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:09,595 INFO L462 AbstractCegarLoop]: Abstraction has 1539 states and 1952 transitions. [2019-11-06 22:36:09,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1952 transitions. [2019-11-06 22:36:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 22:36:09,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:09,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:36:09,604 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1854304108, now seen corresponding path program 1 times [2019-11-06 22:36:09,605 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:09,606 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297092317] [2019-11-06 22:36:09,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:09,730 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297092317] [2019-11-06 22:36:09,730 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:09,730 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:09,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328532364] [2019-11-06 22:36:09,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:09,731 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:09,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:09,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:09,732 INFO L87 Difference]: Start difference. First operand 1539 states and 1952 transitions. Second operand 6 states. [2019-11-06 22:36:10,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:10,501 INFO L93 Difference]: Finished difference Result 4306 states and 5773 transitions. [2019-11-06 22:36:10,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:36:10,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-11-06 22:36:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:10,517 INFO L225 Difference]: With dead ends: 4306 [2019-11-06 22:36:10,517 INFO L226 Difference]: Without dead ends: 2773 [2019-11-06 22:36:10,523 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:36:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2019-11-06 22:36:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2733. [2019-11-06 22:36:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2733 states. [2019-11-06 22:36:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 3336 transitions. [2019-11-06 22:36:10,604 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 3336 transitions. Word has length 119 [2019-11-06 22:36:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:10,605 INFO L462 AbstractCegarLoop]: Abstraction has 2733 states and 3336 transitions. [2019-11-06 22:36:10,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 3336 transitions. [2019-11-06 22:36:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:36:10,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:10,611 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] [2019-11-06 22:36:10,611 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:10,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:10,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2014345303, now seen corresponding path program 1 times [2019-11-06 22:36:10,612 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:10,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410297338] [2019-11-06 22:36:10,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:10,763 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 22:36:10,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410297338] [2019-11-06 22:36:10,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421036185] [2019-11-06 22:36:10,764 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 22:36:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:10,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:36:10,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:36:10,967 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 22:36:10,968 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:36:11,065 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 22:36:11,066 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:36:11,066 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-06 22:36:11,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326863751] [2019-11-06 22:36:11,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:11,067 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:11,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:11,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:36:11,068 INFO L87 Difference]: Start difference. First operand 2733 states and 3336 transitions. Second operand 3 states. [2019-11-06 22:36:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:11,628 INFO L93 Difference]: Finished difference Result 6474 states and 7925 transitions. [2019-11-06 22:36:11,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:36:11,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-11-06 22:36:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:11,641 INFO L225 Difference]: With dead ends: 6474 [2019-11-06 22:36:11,641 INFO L226 Difference]: Without dead ends: 2419 [2019-11-06 22:36:11,651 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 248 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 22:36:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2019-11-06 22:36:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2417. [2019-11-06 22:36:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2417 states. [2019-11-06 22:36:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 2835 transitions. [2019-11-06 22:36:11,706 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 2835 transitions. Word has length 123 [2019-11-06 22:36:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:11,707 INFO L462 AbstractCegarLoop]: Abstraction has 2417 states and 2835 transitions. [2019-11-06 22:36:11,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:36:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 2835 transitions. [2019-11-06 22:36:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 22:36:11,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:11,713 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, 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] [2019-11-06 22:36:11,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:36:11,926 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1340427713, now seen corresponding path program 1 times [2019-11-06 22:36:11,929 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:11,930 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065637218] [2019-11-06 22:36:11,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 22:36:12,025 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065637218] [2019-11-06 22:36:12,025 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149117638] [2019-11-06 22:36:12,025 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 22:36:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:12,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:36:12,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:36:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-06 22:36:12,236 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:36:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 22:36:12,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1093742814] [2019-11-06 22:36:12,323 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 161 [2019-11-06 22:36:12,393 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:36:12,394 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)