/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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:30:39,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:30:39,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:30:39,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:30:39,876 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 22:30:39,894 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:30:39,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:30:39,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:30:39,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:30:39,897 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:30:39,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:30:39,898 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:30:39,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:30:39,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:30:39,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:30:39,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:30:39,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:30:39,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:30:39,900 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:30:39,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:30:39,900 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:30:39,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:30:39,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:30:39,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:30:39,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:30:39,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:30:39,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:30:39,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:30:39,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:30:39,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:30:39,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:30:39,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:30:39,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:30:39,903 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 22:30:40,170 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:30:40,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:30:40,193 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:30:40,195 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:30:40,195 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:30:40,196 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label37.c [2019-11-06 22:30:40,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ad06ce73/2e85d571cdb6448fbc31bc3f4d17398f/FLAG1abb3e05d [2019-11-06 22:30:40,871 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:30:40,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label37.c [2019-11-06 22:30:40,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ad06ce73/2e85d571cdb6448fbc31bc3f4d17398f/FLAG1abb3e05d [2019-11-06 22:30:41,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ad06ce73/2e85d571cdb6448fbc31bc3f4d17398f [2019-11-06 22:30:41,158 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:30:41,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:30:41,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:30:41,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:30:41,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:30:41,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:41" (1/1) ... [2019-11-06 22:30:41,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d482f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41, skipping insertion in model container [2019-11-06 22:30:41,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:41" (1/1) ... [2019-11-06 22:30:41,175 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:30:41,222 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:30:41,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:30:41,773 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:30:41,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:30:41,944 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:30:41,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41 WrapperNode [2019-11-06 22:30:41,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:30:41,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:30:41,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:30:41,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:30:41,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41" (1/1) ... [2019-11-06 22:30:41,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41" (1/1) ... [2019-11-06 22:30:41,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41" (1/1) ... [2019-11-06 22:30:41,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41" (1/1) ... [2019-11-06 22:30:42,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41" (1/1) ... [2019-11-06 22:30:42,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41" (1/1) ... [2019-11-06 22:30:42,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41" (1/1) ... [2019-11-06 22:30:42,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:30:42,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:30:42,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:30:42,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:30:42,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41" (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 22:30:42,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:30:42,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:30:42,182 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:30:42,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:30:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:30:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:30:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:30:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:30:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:30:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:30:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:30:43,326 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:30:43,326 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:30:43,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:43 BoogieIcfgContainer [2019-11-06 22:30:43,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:30:43,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:30:43,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:30:43,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:30:43,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:41" (1/3) ... [2019-11-06 22:30:43,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554d4287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:43, skipping insertion in model container [2019-11-06 22:30:43,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:41" (2/3) ... [2019-11-06 22:30:43,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554d4287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:43, skipping insertion in model container [2019-11-06 22:30:43,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:43" (3/3) ... [2019-11-06 22:30:43,345 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label37.c [2019-11-06 22:30:43,357 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:30:43,367 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:30:43,379 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:30:43,415 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:30:43,415 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:30:43,416 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:30:43,416 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:30:43,417 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:30:43,417 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:30:43,417 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:30:43,418 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:30:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:30:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 22:30:43,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:43,453 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] [2019-11-06 22:30:43,455 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:43,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1092132023, now seen corresponding path program 1 times [2019-11-06 22:30:43,470 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:43,471 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831853139] [2019-11-06 22:30:43,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:43,901 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 22:30:43,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831853139] [2019-11-06 22:30:43,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:43,903 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:30:43,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814825650] [2019-11-06 22:30:43,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:43,914 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:43,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:43,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:43,931 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:30:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:44,740 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:30:44,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:44,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2019-11-06 22:30:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:44,757 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:30:44,757 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:30:44,763 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 22:30:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:30:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:30:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:30:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-11-06 22:30:44,830 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 81 [2019-11-06 22:30:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:44,831 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-11-06 22:30:44,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-11-06 22:30:44,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-06 22:30:44,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:44,836 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] [2019-11-06 22:30:44,837 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:44,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1103688704, now seen corresponding path program 1 times [2019-11-06 22:30:44,838 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:44,838 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709371086] [2019-11-06 22:30:44,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:44,978 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 22:30:44,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709371086] [2019-11-06 22:30:44,980 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:44,980 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:30:44,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396084905] [2019-11-06 22:30:44,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:30:44,982 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:44,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:30:44,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:30:44,983 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-11-06 22:30:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:45,786 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-11-06 22:30:45,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:30:45,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2019-11-06 22:30:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:45,797 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:30:45,797 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:30:45,799 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 22:30:45,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:30:45,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-11-06 22:30:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-11-06 22:30:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 784 transitions. [2019-11-06 22:30:45,845 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 784 transitions. Word has length 91 [2019-11-06 22:30:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:45,845 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 784 transitions. [2019-11-06 22:30:45,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:30:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 784 transitions. [2019-11-06 22:30:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-06 22:30:45,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:45,852 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:30:45,853 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1757730961, now seen corresponding path program 1 times [2019-11-06 22:30:45,853 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:45,854 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568789587] [2019-11-06 22:30:45,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:45,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568789587] [2019-11-06 22:30:45,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073435562] [2019-11-06 22:30:45,954 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 22:30:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:46,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:30:46,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:30:46,207 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:30:46,261 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:30:46,261 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:30:46,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39802037] [2019-11-06 22:30:46,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:46,263 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:46,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:30:46,264 INFO L87 Difference]: Start difference. First operand 556 states and 784 transitions. Second operand 3 states. [2019-11-06 22:30:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:46,759 INFO L93 Difference]: Finished difference Result 1650 states and 2377 transitions. [2019-11-06 22:30:46,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:46,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2019-11-06 22:30:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:46,767 INFO L225 Difference]: With dead ends: 1650 [2019-11-06 22:30:46,767 INFO L226 Difference]: Without dead ends: 1100 [2019-11-06 22:30:46,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:30:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2019-11-06 22:30:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1100. [2019-11-06 22:30:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2019-11-06 22:30:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1508 transitions. [2019-11-06 22:30:46,833 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1508 transitions. Word has length 115 [2019-11-06 22:30:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:46,836 INFO L462 AbstractCegarLoop]: Abstraction has 1100 states and 1508 transitions. [2019-11-06 22:30:46,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1508 transitions. [2019-11-06 22:30:46,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-06 22:30:46,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:46,849 INFO L410 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:47,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:47,057 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:47,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:47,058 INFO L82 PathProgramCache]: Analyzing trace with hash -80606461, now seen corresponding path program 1 times [2019-11-06 22:30:47,058 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:47,058 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299550378] [2019-11-06 22:30:47,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:47,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299550378] [2019-11-06 22:30:47,300 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858186181] [2019-11-06 22:30:47,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:47,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:30:47,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:47,519 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:47,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [702585493] [2019-11-06 22:30:47,683 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 165 [2019-11-06 22:30:47,732 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:30:47,732 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)