/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/Problem12_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:49:26,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:49:26,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:49:26,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:49:26,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:49:26,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:49:26,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:49:26,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:49:26,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:49:26,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:49:26,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:49:26,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:49:26,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:49:26,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:49:26,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:49:26,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:49:26,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:49:26,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:49:26,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:49:26,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:49:26,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:49:26,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:49:26,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:49:26,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:49:26,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:49:26,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:49:26,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:49:26,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:49:26,285 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 22:49:26,299 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:49:26,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:49:26,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:49:26,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:49:26,301 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:49:26,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:49:26,301 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:49:26,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:49:26,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:49:26,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:49:26,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:49:26,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:49:26,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:49:26,303 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:49:26,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:49:26,303 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:49:26,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:49:26,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:49:26,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:49:26,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:49:26,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:49:26,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:49:26,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:49:26,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:49:26,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:49:26,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:49:26,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:49:26,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:49:26,307 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 22:49:26,578 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:49:26,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:49:26,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:49:26,601 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:49:26,602 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:49:26,602 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label46.c [2019-11-06 22:49:26,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e1e3f66f/34e3826a862848b2a08eec842b865d26/FLAGbe0c9be62 [2019-11-06 22:49:27,445 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:49:27,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label46.c [2019-11-06 22:49:27,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e1e3f66f/34e3826a862848b2a08eec842b865d26/FLAGbe0c9be62 [2019-11-06 22:49:27,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e1e3f66f/34e3826a862848b2a08eec842b865d26 [2019-11-06 22:49:27,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:49:27,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:49:27,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:27,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:49:27,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:49:27,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:27" (1/1) ... [2019-11-06 22:49:27,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a11d1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27, skipping insertion in model container [2019-11-06 22:49:27,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:27" (1/1) ... [2019-11-06 22:49:27,557 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:49:27,712 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:49:29,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:29,207 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:49:29,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:29,877 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:49:29,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:29 WrapperNode [2019-11-06 22:49:29,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:29,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:49:29,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:49:29,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:49:29,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:29" (1/1) ... [2019-11-06 22:49:29,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:29" (1/1) ... [2019-11-06 22:49:29,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:29" (1/1) ... [2019-11-06 22:49:29,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:29" (1/1) ... [2019-11-06 22:49:30,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:29" (1/1) ... [2019-11-06 22:49:30,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:29" (1/1) ... [2019-11-06 22:49:30,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:29" (1/1) ... [2019-11-06 22:49:30,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:49:30,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:49:30,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:49:30,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:49:30,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:29" (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 22:49:30,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:49:30,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:49:30,248 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:49:30,248 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:49:30,249 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:49:30,249 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 22:49:30,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:49:30,249 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:49:30,249 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:49:30,249 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:49:30,249 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 22:49:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:49:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:49:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:49:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:49:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:49:30,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:49:34,953 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:49:34,954 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:49:34,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:34 BoogieIcfgContainer [2019-11-06 22:49:34,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:49:34,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:49:34,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:49:34,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:49:34,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:49:27" (1/3) ... [2019-11-06 22:49:34,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46923b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:34, skipping insertion in model container [2019-11-06 22:49:34,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:29" (2/3) ... [2019-11-06 22:49:34,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46923b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:34, skipping insertion in model container [2019-11-06 22:49:34,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:34" (3/3) ... [2019-11-06 22:49:34,975 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label46.c [2019-11-06 22:49:34,989 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:49:35,000 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:49:35,012 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:49:35,059 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:49:35,060 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:49:35,060 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:49:35,061 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:49:35,061 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:49:35,061 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:49:35,061 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:49:35,061 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:49:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-11-06 22:49:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 22:49:35,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:35,117 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] [2019-11-06 22:49:35,118 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:35,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:35,123 INFO L82 PathProgramCache]: Analyzing trace with hash 415024674, now seen corresponding path program 1 times [2019-11-06 22:49:35,130 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:35,130 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891752157] [2019-11-06 22:49:35,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:35,578 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 22:49:35,579 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891752157] [2019-11-06 22:49:35,580 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:35,580 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:49:35,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721459121] [2019-11-06 22:49:35,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:49:35,589 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:35,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:49:35,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:49:35,607 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 4 states. [2019-11-06 22:49:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:44,678 INFO L93 Difference]: Finished difference Result 3230 states and 6251 transitions. [2019-11-06 22:49:44,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:49:44,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2019-11-06 22:49:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:44,726 INFO L225 Difference]: With dead ends: 3230 [2019-11-06 22:49:44,727 INFO L226 Difference]: Without dead ends: 2309 [2019-11-06 22:49:44,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:49:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-11-06 22:49:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2309. [2019-11-06 22:49:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2309 states. [2019-11-06 22:49:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3821 transitions. [2019-11-06 22:49:44,919 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3821 transitions. Word has length 67 [2019-11-06 22:49:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:44,920 INFO L462 AbstractCegarLoop]: Abstraction has 2309 states and 3821 transitions. [2019-11-06 22:49:44,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:49:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3821 transitions. [2019-11-06 22:49:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 22:49:44,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:44,929 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:49:44,930 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash 295469771, now seen corresponding path program 1 times [2019-11-06 22:49:44,931 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:44,931 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986649165] [2019-11-06 22:49:44,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:45,283 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986649165] [2019-11-06 22:49:45,283 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:45,284 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:49:45,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966283836] [2019-11-06 22:49:45,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:49:45,292 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:49:45,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:49:45,293 INFO L87 Difference]: Start difference. First operand 2309 states and 3821 transitions. Second operand 6 states. [2019-11-06 22:49:52,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:52,033 INFO L93 Difference]: Finished difference Result 7045 states and 11809 transitions. [2019-11-06 22:49:52,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:49:52,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2019-11-06 22:49:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:52,073 INFO L225 Difference]: With dead ends: 7045 [2019-11-06 22:49:52,073 INFO L226 Difference]: Without dead ends: 4742 [2019-11-06 22:49:52,080 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 22:49:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2019-11-06 22:49:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4697. [2019-11-06 22:49:52,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4697 states. [2019-11-06 22:49:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 7461 transitions. [2019-11-06 22:49:52,247 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 7461 transitions. Word has length 166 [2019-11-06 22:49:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:52,250 INFO L462 AbstractCegarLoop]: Abstraction has 4697 states and 7461 transitions. [2019-11-06 22:49:52,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:49:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 7461 transitions. [2019-11-06 22:49:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-06 22:49:52,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:52,261 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:49:52,262 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:52,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1841917839, now seen corresponding path program 1 times [2019-11-06 22:49:52,263 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:52,263 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587458824] [2019-11-06 22:49:52,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:52,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587458824] [2019-11-06 22:49:52,569 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:52,570 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:49:52,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209285] [2019-11-06 22:49:52,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:49:52,574 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:52,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:49:52,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:49:52,575 INFO L87 Difference]: Start difference. First operand 4697 states and 7461 transitions. Second operand 4 states. [2019-11-06 22:50:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:00,347 INFO L93 Difference]: Finished difference Result 18736 states and 30965 transitions. [2019-11-06 22:50:00,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:50:00,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2019-11-06 22:50:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:00,427 INFO L225 Difference]: With dead ends: 18736 [2019-11-06 22:50:00,427 INFO L226 Difference]: Without dead ends: 14045 [2019-11-06 22:50:00,443 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 22:50:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14045 states. [2019-11-06 22:50:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14045 to 14045. [2019-11-06 22:50:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14045 states. [2019-11-06 22:50:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14045 states to 14045 states and 22265 transitions. [2019-11-06 22:50:00,898 INFO L78 Accepts]: Start accepts. Automaton has 14045 states and 22265 transitions. Word has length 216 [2019-11-06 22:50:00,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:00,900 INFO L462 AbstractCegarLoop]: Abstraction has 14045 states and 22265 transitions. [2019-11-06 22:50:00,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:50:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 14045 states and 22265 transitions. [2019-11-06 22:50:00,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2019-11-06 22:50:00,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:00,919 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:00,920 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:00,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1634779650, now seen corresponding path program 1 times [2019-11-06 22:50:00,920 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:00,921 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943578790] [2019-11-06 22:50:00,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-06 22:50:01,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943578790] [2019-11-06 22:50:01,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359395106] [2019-11-06 22:50:01,379 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 22:50:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:01,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:50:01,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:50:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-06 22:50:01,733 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:50:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-06 22:50:01,961 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:50:01,961 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-06 22:50:01,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326247115] [2019-11-06 22:50:01,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:50:01,963 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:01,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:50:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:50:01,964 INFO L87 Difference]: Start difference. First operand 14045 states and 22265 transitions. Second operand 4 states.