/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/Problem10_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:42:39,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:42:39,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:42:39,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:42:39,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:42:39,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:42:39,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:42:39,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:42:39,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:42:39,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:42:39,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:42:39,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:42:39,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:42:39,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:42:39,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:42:39,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:42:39,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:42:39,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:42:39,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:42:39,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:42:39,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:42:39,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:42:39,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:42:39,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:42:39,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:42:39,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:42:39,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:42:39,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:42:39,802 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 22:42:39,821 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:42:39,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:42:39,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:42:39,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:42:39,824 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:42:39,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:42:39,824 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:42:39,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:42:39,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:42:39,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:42:39,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:42:39,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:42:39,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:42:39,826 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:42:39,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:42:39,827 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:42:39,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:42:39,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:42:39,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:42:39,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:42:39,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:42:39,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:42:39,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:42:39,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:42:39,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:42:39,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:42:39,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:42:39,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:42:39,829 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 22:42:40,140 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:42:40,154 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:42:40,160 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:42:40,161 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:42:40,162 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:42:40,162 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-11-06 22:42:40,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/312b1e653/b729ad20a336405eb7c943f0a723a58e/FLAG7a4649a50 [2019-11-06 22:42:40,801 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:42:40,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-11-06 22:42:40,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/312b1e653/b729ad20a336405eb7c943f0a723a58e/FLAG7a4649a50 [2019-11-06 22:42:41,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/312b1e653/b729ad20a336405eb7c943f0a723a58e [2019-11-06 22:42:41,057 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:42:41,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:42:41,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:42:41,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:42:41,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:42:41,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:41" (1/1) ... [2019-11-06 22:42:41,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c96835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41, skipping insertion in model container [2019-11-06 22:42:41,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:41" (1/1) ... [2019-11-06 22:42:41,076 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:42:41,138 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:42:41,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:42:41,714 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:42:41,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:42:41,833 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:42:41,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41 WrapperNode [2019-11-06 22:42:41,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:42:41,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:42:41,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:42:41,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:42:41,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41" (1/1) ... [2019-11-06 22:42:41,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41" (1/1) ... [2019-11-06 22:42:41,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41" (1/1) ... [2019-11-06 22:42:41,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41" (1/1) ... [2019-11-06 22:42:41,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41" (1/1) ... [2019-11-06 22:42:41,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41" (1/1) ... [2019-11-06 22:42:41,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41" (1/1) ... [2019-11-06 22:42:41,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:42:41,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:42:41,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:42:41,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:42:41,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41" (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 22:42:42,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:42:42,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:42:42,043 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:42:42,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:42:42,043 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:42:42,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:42:42,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:42:42,044 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:42:42,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:42:42,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:42:42,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:42:43,230 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:42:43,233 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:42:43,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:43 BoogieIcfgContainer [2019-11-06 22:42:43,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:42:43,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:42:43,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:42:43,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:42:43,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:41" (1/3) ... [2019-11-06 22:42:43,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ccc324c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:43, skipping insertion in model container [2019-11-06 22:42:43,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:41" (2/3) ... [2019-11-06 22:42:43,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ccc324c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:43, skipping insertion in model container [2019-11-06 22:42:43,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:43" (3/3) ... [2019-11-06 22:42:43,247 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label24.c [2019-11-06 22:42:43,260 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:42:43,268 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:42:43,280 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:42:43,315 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:42:43,316 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:42:43,317 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:42:43,317 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:42:43,317 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:42:43,318 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:42:43,318 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:42:43,318 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:42:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:42:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 22:42:43,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:43,351 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] [2019-11-06 22:42:43,353 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:43,359 INFO L82 PathProgramCache]: Analyzing trace with hash 894573055, now seen corresponding path program 1 times [2019-11-06 22:42:43,368 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:43,369 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184756931] [2019-11-06 22:42:43,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:43,605 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 22:42:43,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184756931] [2019-11-06 22:42:43,606 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:43,607 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:42:43,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792553595] [2019-11-06 22:42:43,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:42:43,615 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:43,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:42:43,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:42:43,631 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-11-06 22:42:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:44,652 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-11-06 22:42:44,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:42:44,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-06 22:42:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:44,682 INFO L225 Difference]: With dead ends: 571 [2019-11-06 22:42:44,682 INFO L226 Difference]: Without dead ends: 294 [2019-11-06 22:42:44,695 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 22:42:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-06 22:42:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-06 22:42:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:42:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 421 transitions. [2019-11-06 22:42:44,796 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 421 transitions. Word has length 20 [2019-11-06 22:42:44,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:44,796 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 421 transitions. [2019-11-06 22:42:44,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:42:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 421 transitions. [2019-11-06 22:42:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 22:42:44,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:44,805 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:44,805 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:44,806 INFO L82 PathProgramCache]: Analyzing trace with hash 892965265, now seen corresponding path program 1 times [2019-11-06 22:42:44,807 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:44,807 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439438459] [2019-11-06 22:42:44,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:45,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439438459] [2019-11-06 22:42:45,094 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:45,094 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:42:45,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794413290] [2019-11-06 22:42:45,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:42:45,096 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:42:45,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:45,097 INFO L87 Difference]: Start difference. First operand 294 states and 421 transitions. Second operand 6 states. [2019-11-06 22:42:45,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:45,965 INFO L93 Difference]: Finished difference Result 741 states and 1061 transitions. [2019-11-06 22:42:45,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:45,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2019-11-06 22:42:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:45,969 INFO L225 Difference]: With dead ends: 741 [2019-11-06 22:42:45,969 INFO L226 Difference]: Without dead ends: 453 [2019-11-06 22:42:45,971 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 22:42:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-11-06 22:42:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-11-06 22:42:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-11-06 22:42:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 606 transitions. [2019-11-06 22:42:45,994 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 606 transitions. Word has length 89 [2019-11-06 22:42:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:45,995 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 606 transitions. [2019-11-06 22:42:45,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:42:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 606 transitions. [2019-11-06 22:42:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 22:42:45,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:45,998 INFO L410 BasicCegarLoop]: trace histogram [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 22:42:45,998 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:45,999 INFO L82 PathProgramCache]: Analyzing trace with hash 712402589, now seen corresponding path program 1 times [2019-11-06 22:42:45,999 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:45,999 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181669146] [2019-11-06 22:42:45,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:46,105 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181669146] [2019-11-06 22:42:46,106 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:46,106 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:42:46,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307227319] [2019-11-06 22:42:46,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:42:46,107 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:46,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:42:46,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:42:46,108 INFO L87 Difference]: Start difference. First operand 445 states and 606 transitions. Second operand 4 states. [2019-11-06 22:42:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:47,247 INFO L93 Difference]: Finished difference Result 1609 states and 2232 transitions. [2019-11-06 22:42:47,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:42:47,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-11-06 22:42:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:47,255 INFO L225 Difference]: With dead ends: 1609 [2019-11-06 22:42:47,255 INFO L226 Difference]: Without dead ends: 735 [2019-11-06 22:42:47,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:42:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-11-06 22:42:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 592. [2019-11-06 22:42:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-11-06 22:42:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 801 transitions. [2019-11-06 22:42:47,283 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 801 transitions. Word has length 99 [2019-11-06 22:42:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:47,284 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 801 transitions. [2019-11-06 22:42:47,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:42:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 801 transitions. [2019-11-06 22:42:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 22:42:47,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:47,289 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-11-06 22:42:47,289 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:47,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1290039418, now seen corresponding path program 1 times [2019-11-06 22:42:47,290 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:47,290 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665816113] [2019-11-06 22:42:47,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:47,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665816113] [2019-11-06 22:42:47,505 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:42:47,505 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:42:47,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20982292] [2019-11-06 22:42:47,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:42:47,507 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:47,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:42:47,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:42:47,508 INFO L87 Difference]: Start difference. First operand 592 states and 801 transitions. Second operand 6 states. [2019-11-06 22:42:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:48,297 INFO L93 Difference]: Finished difference Result 1492 states and 2064 transitions. [2019-11-06 22:42:48,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:48,298 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-11-06 22:42:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:48,310 INFO L225 Difference]: With dead ends: 1492 [2019-11-06 22:42:48,310 INFO L226 Difference]: Without dead ends: 906 [2019-11-06 22:42:48,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 22:42:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-11-06 22:42:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 890. [2019-11-06 22:42:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-11-06 22:42:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1141 transitions. [2019-11-06 22:42:48,356 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1141 transitions. Word has length 142 [2019-11-06 22:42:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:48,358 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1141 transitions. [2019-11-06 22:42:48,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:42:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1141 transitions. [2019-11-06 22:42:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-06 22:42:48,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:48,375 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:42:48,375 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:48,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1377962712, now seen corresponding path program 1 times [2019-11-06 22:42:48,376 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:48,376 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530529801] [2019-11-06 22:42:48,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:42:48,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530529801] [2019-11-06 22:42:48,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149145844] [2019-11-06 22:42:48,636 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 22:42:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:48,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:42:48,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:42:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:42:48,850 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:42:48,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:42:49,132 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:42:49,132 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-06 22:42:49,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30156764] [2019-11-06 22:42:49,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:42:49,136 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:42:49,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:42:49,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:42:49,137 INFO L87 Difference]: Start difference. First operand 890 states and 1141 transitions. Second operand 5 states. [2019-11-06 22:42:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:42:49,940 INFO L93 Difference]: Finished difference Result 1943 states and 2493 transitions. [2019-11-06 22:42:49,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:42:49,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2019-11-06 22:42:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:42:49,949 INFO L225 Difference]: With dead ends: 1943 [2019-11-06 22:42:49,949 INFO L226 Difference]: Without dead ends: 1059 [2019-11-06 22:42:49,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:42:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2019-11-06 22:42:49,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1047. [2019-11-06 22:42:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2019-11-06 22:42:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1325 transitions. [2019-11-06 22:42:50,004 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1325 transitions. Word has length 189 [2019-11-06 22:42:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:42:50,005 INFO L462 AbstractCegarLoop]: Abstraction has 1047 states and 1325 transitions. [2019-11-06 22:42:50,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:42:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1325 transitions. [2019-11-06 22:42:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-11-06 22:42:50,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:42:50,015 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:42:50,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:42:50,223 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:42:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:42:50,223 INFO L82 PathProgramCache]: Analyzing trace with hash -608870379, now seen corresponding path program 1 times [2019-11-06 22:42:50,224 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:42:50,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634739089] [2019-11-06 22:42:50,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:42:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 111 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-06 22:42:51,402 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634739089] [2019-11-06 22:42:51,402 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61004186] [2019-11-06 22:42:51,402 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 22:42:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:42:51,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:42:51,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:42:51,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:42:51,641 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:42:51,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:51,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:42:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 111 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-06 22:42:51,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [487736243] [2019-11-06 22:42:51,875 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 260 [2019-11-06 22:42:51,933 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:42:51,933 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:42:56,229 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.