/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/Problem01_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:29:24,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:29:24,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:29:24,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:29:24,776 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 22:29:24,796 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:29:24,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:29:24,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:29:24,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:29:24,799 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:29:24,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:29:24,800 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:29:24,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:29:24,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:29:24,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:29:24,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:29:24,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:29:24,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:29:24,802 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:29:24,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:29:24,803 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:29:24,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:29:24,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:29:24,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:29:24,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:29:24,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:29:24,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:29:24,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:29:24,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:29:24,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:29:24,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:29:24,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:29:24,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:29:24,805 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 22:29:25,060 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:29:25,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:29:25,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:29:25,076 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:29:25,077 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:29:25,077 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label21.c [2019-11-06 22:29:25,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce69bd8bb/ae665bdfb42244a4968b8c569c2256d9/FLAG7bfb92ce5 [2019-11-06 22:29:25,620 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:29:25,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label21.c [2019-11-06 22:29:25,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce69bd8bb/ae665bdfb42244a4968b8c569c2256d9/FLAG7bfb92ce5 [2019-11-06 22:29:25,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce69bd8bb/ae665bdfb42244a4968b8c569c2256d9 [2019-11-06 22:29:25,882 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:29:25,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:29:25,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:25,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:29:25,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:29:25,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:25" (1/1) ... [2019-11-06 22:29:25,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5238feaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:25, skipping insertion in model container [2019-11-06 22:29:25,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:25" (1/1) ... [2019-11-06 22:29:25,899 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:29:25,946 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:29:26,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:26,413 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:29:26,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:26,651 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:29:26,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:26 WrapperNode [2019-11-06 22:29:26,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:26,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:29:26,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:29:26,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:29:26,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:26" (1/1) ... [2019-11-06 22:29:26,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:26" (1/1) ... [2019-11-06 22:29:26,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:26" (1/1) ... [2019-11-06 22:29:26,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:26" (1/1) ... [2019-11-06 22:29:26,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:26" (1/1) ... [2019-11-06 22:29:26,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:26" (1/1) ... [2019-11-06 22:29:26,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:26" (1/1) ... [2019-11-06 22:29:26,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:29:26,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:29:26,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:29:26,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:29:26,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:26" (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 22:29:26,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:29:26,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:29:26,819 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:29:26,820 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:29:26,820 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:29:26,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:29:26,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:29:26,820 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:29:26,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:29:26,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:29:26,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:29:27,926 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:29:27,926 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:29:27,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:27 BoogieIcfgContainer [2019-11-06 22:29:27,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:29:27,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:29:27,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:29:27,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:29:27,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:25" (1/3) ... [2019-11-06 22:29:27,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500bae1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:27, skipping insertion in model container [2019-11-06 22:29:27,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:26" (2/3) ... [2019-11-06 22:29:27,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500bae1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:27, skipping insertion in model container [2019-11-06 22:29:27,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:27" (3/3) ... [2019-11-06 22:29:27,948 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label21.c [2019-11-06 22:29:27,960 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:29:27,969 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:29:27,980 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:29:28,016 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:29:28,017 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:29:28,019 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:29:28,019 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:29:28,019 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:29:28,020 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:29:28,020 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:29:28,020 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:29:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:29:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 22:29:28,064 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:28,065 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] [2019-11-06 22:29:28,067 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:28,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1860977577, now seen corresponding path program 1 times [2019-11-06 22:29:28,082 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:28,083 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431474245] [2019-11-06 22:29:28,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:28,525 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 22:29:28,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431474245] [2019-11-06 22:29:28,527 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:28,527 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:29:28,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396785167] [2019-11-06 22:29:28,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:28,536 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:28,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:28,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:29:28,553 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:29:29,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:29,396 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:29:29,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:29,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2019-11-06 22:29:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:29,421 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:29:29,421 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:29:29,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 22:29:29,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:29:29,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:29:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:29:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-11-06 22:29:29,494 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 89 [2019-11-06 22:29:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:29,495 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-11-06 22:29:29,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-11-06 22:29:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 22:29:29,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:29,501 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:29:29,501 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:29,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:29,502 INFO L82 PathProgramCache]: Analyzing trace with hash 64410272, now seen corresponding path program 1 times [2019-11-06 22:29:29,502 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:29,502 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713026399] [2019-11-06 22:29:29,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:29,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713026399] [2019-11-06 22:29:29,617 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:29,617 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:29:29,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447933305] [2019-11-06 22:29:29,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:29:29,619 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:29:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:29:29,620 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-11-06 22:29:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:30,348 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-11-06 22:29:30,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:29:30,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2019-11-06 22:29:30,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:30,359 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:29:30,360 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:29:30,361 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 22:29:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:29:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-11-06 22:29:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-11-06 22:29:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-11-06 22:29:30,411 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 99 [2019-11-06 22:29:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:30,412 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-11-06 22:29:30,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:29:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-11-06 22:29:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 22:29:30,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:30,416 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:29:30,417 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash 899392414, now seen corresponding path program 1 times [2019-11-06 22:29:30,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:30,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609677812] [2019-11-06 22:29:30,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:30,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609677812] [2019-11-06 22:29:30,549 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:30,550 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:29:30,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610762866] [2019-11-06 22:29:30,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:30,553 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:30,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:29:30,554 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 3 states. [2019-11-06 22:29:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:31,125 INFO L93 Difference]: Finished difference Result 1513 states and 2159 transitions. [2019-11-06 22:29:31,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:31,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-11-06 22:29:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:31,132 INFO L225 Difference]: With dead ends: 1513 [2019-11-06 22:29:31,132 INFO L226 Difference]: Without dead ends: 963 [2019-11-06 22:29:31,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:29:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2019-11-06 22:29:31,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2019-11-06 22:29:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2019-11-06 22:29:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1316 transitions. [2019-11-06 22:29:31,191 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1316 transitions. Word has length 100 [2019-11-06 22:29:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:31,192 INFO L462 AbstractCegarLoop]: Abstraction has 963 states and 1316 transitions. [2019-11-06 22:29:31,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1316 transitions. [2019-11-06 22:29:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 22:29:31,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:31,198 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:29:31,198 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:31,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:31,198 INFO L82 PathProgramCache]: Analyzing trace with hash 973113403, now seen corresponding path program 1 times [2019-11-06 22:29:31,199 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:31,199 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47773005] [2019-11-06 22:29:31,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:31,326 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47773005] [2019-11-06 22:29:31,326 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54745011] [2019-11-06 22:29:31,327 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 22:29:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:31,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:29:31,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:29:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:31,606 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:29:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:31,731 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1539393883] [2019-11-06 22:29:31,737 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 121 [2019-11-06 22:29:31,786 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:29:31,786 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)