/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_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:35:00,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:35:00,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:35:00,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:35:00,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:35:00,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:35:00,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:35:00,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:35:00,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:35:00,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:35:00,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:35:00,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:35:00,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:35:00,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:35:00,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:35:00,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:35:00,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:35:00,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:35:00,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:35:00,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:35:00,112 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 22:35:00,146 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:35:00,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:35:00,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:35:00,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:35:00,153 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:35:00,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:35:00,153 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:35:00,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:35:00,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:35:00,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:35:00,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:35:00,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:35:00,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:35:00,154 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:35:00,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:35:00,155 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:35:00,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:35:00,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:35:00,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:35:00,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:35:00,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:35:00,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:35:00,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:35:00,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:35:00,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:35:00,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:35:00,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:35:00,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:35:00,157 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 22:35:00,444 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:35:00,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:35:00,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:35:00,468 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:35:00,469 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:35:00,470 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label31.c [2019-11-06 22:35:00,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e1afcfd/8436cfcfc790459db4a9fbb6b13140c7/FLAG0303a7d95 [2019-11-06 22:35:01,158 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:35:01,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label31.c [2019-11-06 22:35:01,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e1afcfd/8436cfcfc790459db4a9fbb6b13140c7/FLAG0303a7d95 [2019-11-06 22:35:01,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e1afcfd/8436cfcfc790459db4a9fbb6b13140c7 [2019-11-06 22:35:01,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:35:01,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:35:01,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:35:01,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:35:01,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:35:01,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:35:01" (1/1) ... [2019-11-06 22:35:01,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a277098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:01, skipping insertion in model container [2019-11-06 22:35:01,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:35:01" (1/1) ... [2019-11-06 22:35:01,473 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:35:01,529 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:35:02,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:35:02,067 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:35:02,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:35:02,207 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:35:02,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:02 WrapperNode [2019-11-06 22:35:02,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:35:02,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:35:02,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:35:02,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:35:02,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:02" (1/1) ... [2019-11-06 22:35:02,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:02" (1/1) ... [2019-11-06 22:35:02,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:02" (1/1) ... [2019-11-06 22:35:02,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:02" (1/1) ... [2019-11-06 22:35:02,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:02" (1/1) ... [2019-11-06 22:35:02,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:02" (1/1) ... [2019-11-06 22:35:02,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:02" (1/1) ... [2019-11-06 22:35:02,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:35:02,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:35:02,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:35:02,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:35:02,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:02" (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 22:35:02,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:35:02,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:35:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:35:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:35:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:35:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:35:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:35:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:35:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:35:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:35:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:35:03,737 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:35:03,738 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:35:03,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:35:03 BoogieIcfgContainer [2019-11-06 22:35:03,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:35:03,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:35:03,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:35:03,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:35:03,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:35:01" (1/3) ... [2019-11-06 22:35:03,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6504bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:35:03, skipping insertion in model container [2019-11-06 22:35:03,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:02" (2/3) ... [2019-11-06 22:35:03,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6504bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:35:03, skipping insertion in model container [2019-11-06 22:35:03,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:35:03" (3/3) ... [2019-11-06 22:35:03,756 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label31.c [2019-11-06 22:35:03,770 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:35:03,780 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:35:03,792 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:35:03,831 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:35:03,831 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:35:03,831 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:35:03,831 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:35:03,832 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:35:03,832 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:35:03,832 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:35:03,832 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:35:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:35:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:35:03,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:35:03,885 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, 1, 1, 1, 1, 1, 1, 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 22:35:03,889 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:35:03,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:35:03,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1634450302, now seen corresponding path program 1 times [2019-11-06 22:35:03,903 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:35:03,904 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023980531] [2019-11-06 22:35:03,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:35:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:35:04,384 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 22:35:04,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023980531] [2019-11-06 22:35:04,386 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:35:04,386 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:35:04,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110694113] [2019-11-06 22:35:04,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:35:04,396 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:35:04,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:35:04,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:35:04,414 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:35:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:35:05,447 INFO L93 Difference]: Finished difference Result 623 states and 1065 transitions. [2019-11-06 22:35:05,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:35:05,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2019-11-06 22:35:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:35:05,477 INFO L225 Difference]: With dead ends: 623 [2019-11-06 22:35:05,477 INFO L226 Difference]: Without dead ends: 325 [2019-11-06 22:35:05,489 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 22:35:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-11-06 22:35:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2019-11-06 22:35:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:35:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 473 transitions. [2019-11-06 22:35:05,569 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 473 transitions. Word has length 122 [2019-11-06 22:35:05,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:35:05,570 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 473 transitions. [2019-11-06 22:35:05,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:35:05,570 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 473 transitions. [2019-11-06 22:35:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 22:35:05,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:35:05,576 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:35:05,576 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:35:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:35:05,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1584907331, now seen corresponding path program 1 times [2019-11-06 22:35:05,577 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:35:05,577 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176495316] [2019-11-06 22:35:05,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:35:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:35:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:35:05,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176495316] [2019-11-06 22:35:05,720 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:35:05,721 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:35:05,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66520968] [2019-11-06 22:35:05,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:35:05,723 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:35:05,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:35:05,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:35:05,724 INFO L87 Difference]: Start difference. First operand 321 states and 473 transitions. Second operand 6 states. [2019-11-06 22:35:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:35:06,516 INFO L93 Difference]: Finished difference Result 955 states and 1447 transitions. [2019-11-06 22:35:06,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:35:06,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-11-06 22:35:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:35:06,527 INFO L225 Difference]: With dead ends: 955 [2019-11-06 22:35:06,527 INFO L226 Difference]: Without dead ends: 640 [2019-11-06 22:35:06,530 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 22:35:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2019-11-06 22:35:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 623. [2019-11-06 22:35:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-11-06 22:35:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 902 transitions. [2019-11-06 22:35:06,594 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 902 transitions. Word has length 142 [2019-11-06 22:35:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:35:06,594 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 902 transitions. [2019-11-06 22:35:06,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:35:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 902 transitions. [2019-11-06 22:35:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 22:35:06,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:35:06,600 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:35:06,600 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:35:06,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:35:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2015790622, now seen corresponding path program 1 times [2019-11-06 22:35:06,601 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:35:06,601 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242762891] [2019-11-06 22:35:06,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:35:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:35:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:35:06,752 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242762891] [2019-11-06 22:35:06,752 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271406749] [2019-11-06 22:35:06,753 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 22:35:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:35:06,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:35:06,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:35:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:35:07,007 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:35:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:35:07,134 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1467479807] [2019-11-06 22:35:07,142 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 151 [2019-11-06 22:35:07,213 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:35:07,214 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)