/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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:15:38,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:15:38,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:15:38,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:15:38,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:15:38,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:15:38,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:15:38,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:15:38,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:15:38,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:15:38,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:15:38,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:15:38,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:15:38,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:15:38,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:15:38,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:15:38,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:15:38,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:15:38,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:15:38,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:15:38,238 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 19:15:38,258 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:15:38,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:15:38,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:15:38,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:15:38,260 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:15:38,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:15:38,260 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:15:38,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:15:38,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:15:38,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:15:38,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:15:38,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:15:38,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:15:38,262 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:15:38,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:15:38,262 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:15:38,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:15:38,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:15:38,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:15:38,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:15:38,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:15:38,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:15:38,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:15:38,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:15:38,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:15:38,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:15:38,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:15:38,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:15:38,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:15:38,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:15:38,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:15:38,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:15:38,559 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:15:38,559 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:15:38,560 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-11-06 19:15:38,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0283bc166/7d600f5577864e38abf987f1a249aab7/FLAG37714eea8 [2019-11-06 19:15:39,294 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:15:39,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-11-06 19:15:39,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0283bc166/7d600f5577864e38abf987f1a249aab7/FLAG37714eea8 [2019-11-06 19:15:39,459 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0283bc166/7d600f5577864e38abf987f1a249aab7 [2019-11-06 19:15:39,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:15:39,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:15:39,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:39,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:15:39,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:15:39,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:39" (1/1) ... [2019-11-06 19:15:39,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@318fff0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39, skipping insertion in model container [2019-11-06 19:15:39,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:39" (1/1) ... [2019-11-06 19:15:39,492 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:15:39,578 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:15:40,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:40,537 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:15:41,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:41,040 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:15:41,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41 WrapperNode [2019-11-06 19:15:41,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:41,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:15:41,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:15:41,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:15:41,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41" (1/1) ... [2019-11-06 19:15:41,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41" (1/1) ... [2019-11-06 19:15:41,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41" (1/1) ... [2019-11-06 19:15:41,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41" (1/1) ... [2019-11-06 19:15:41,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41" (1/1) ... [2019-11-06 19:15:41,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41" (1/1) ... [2019-11-06 19:15:41,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41" (1/1) ... [2019-11-06 19:15:41,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:15:41,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:15:41,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:15:41,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:15:41,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41" (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 19:15:41,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:15:41,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:15:41,328 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:15:41,329 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:15:41,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:15:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:15:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:15:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:15:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:15:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:15:41,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:15:41,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:15:41,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:44,861 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:44,861 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:44,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:44 BoogieIcfgContainer [2019-11-06 19:15:44,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:44,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:44,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:44,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:44,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:15:39" (1/3) ... [2019-11-06 19:15:44,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab543b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:44, skipping insertion in model container [2019-11-06 19:15:44,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41" (2/3) ... [2019-11-06 19:15:44,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab543b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:44, skipping insertion in model container [2019-11-06 19:15:44,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:44" (3/3) ... [2019-11-06 19:15:44,872 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label31.c [2019-11-06 19:15:44,882 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:44,892 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:44,903 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:44,933 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:44,934 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:44,934 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:44,934 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:44,934 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:44,934 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:44,934 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:44,935 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:44,964 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:15:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 19:15:44,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:44,978 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] [2019-11-06 19:15:44,981 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2120890949, now seen corresponding path program 1 times [2019-11-06 19:15:45,000 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:45,001 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975991427] [2019-11-06 19:15:45,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:45,570 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 19:15:45,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975991427] [2019-11-06 19:15:45,572 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:45,572 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:15:45,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262661109] [2019-11-06 19:15:45,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:45,580 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:45,597 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:15:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:51,447 INFO L93 Difference]: Finished difference Result 1575 states and 2878 transitions. [2019-11-06 19:15:51,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:51,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2019-11-06 19:15:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:51,481 INFO L225 Difference]: With dead ends: 1575 [2019-11-06 19:15:51,481 INFO L226 Difference]: Without dead ends: 1055 [2019-11-06 19:15:51,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:51,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2019-11-06 19:15:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1024. [2019-11-06 19:15:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2019-11-06 19:15:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1749 transitions. [2019-11-06 19:15:51,641 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1749 transitions. Word has length 71 [2019-11-06 19:15:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:51,642 INFO L462 AbstractCegarLoop]: Abstraction has 1024 states and 1749 transitions. [2019-11-06 19:15:51,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1749 transitions. [2019-11-06 19:15:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-06 19:15:51,665 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:51,665 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:51,665 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:51,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1052620642, now seen corresponding path program 1 times [2019-11-06 19:15:51,667 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:51,667 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703797262] [2019-11-06 19:15:51,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:51,955 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703797262] [2019-11-06 19:15:51,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587410700] [2019-11-06 19:15:51,956 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 19:15:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:52,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:52,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:52,127 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:52,127 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:52,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123918244] [2019-11-06 19:15:52,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:52,132 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:52,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:52,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:52,133 INFO L87 Difference]: Start difference. First operand 1024 states and 1749 transitions. Second operand 3 states. [2019-11-06 19:15:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:54,304 INFO L93 Difference]: Finished difference Result 2976 states and 5156 transitions. [2019-11-06 19:15:54,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:54,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-11-06 19:15:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:54,320 INFO L225 Difference]: With dead ends: 2976 [2019-11-06 19:15:54,320 INFO L226 Difference]: Without dead ends: 1958 [2019-11-06 19:15:54,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2019-11-06 19:15:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955. [2019-11-06 19:15:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2019-11-06 19:15:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2868 transitions. [2019-11-06 19:15:54,457 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2868 transitions. Word has length 140 [2019-11-06 19:15:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:54,459 INFO L462 AbstractCegarLoop]: Abstraction has 1955 states and 2868 transitions. [2019-11-06 19:15:54,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2868 transitions. [2019-11-06 19:15:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 19:15:54,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:54,465 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:15:54,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:54,672 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash -737037300, now seen corresponding path program 1 times [2019-11-06 19:15:54,674 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:54,674 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617229804] [2019-11-06 19:15:54,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:54,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617229804] [2019-11-06 19:15:54,965 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:54,968 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:15:54,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429043331] [2019-11-06 19:15:54,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:15:54,970 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:54,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:15:54,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:15:54,971 INFO L87 Difference]: Start difference. First operand 1955 states and 2868 transitions. Second operand 8 states. [2019-11-06 19:16:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:01,445 INFO L93 Difference]: Finished difference Result 5861 states and 8774 transitions. [2019-11-06 19:16:01,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:16:01,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 157 [2019-11-06 19:16:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:01,472 INFO L225 Difference]: With dead ends: 5861 [2019-11-06 19:16:01,472 INFO L226 Difference]: Without dead ends: 3912 [2019-11-06 19:16:01,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:16:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2019-11-06 19:16:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2934. [2019-11-06 19:16:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-11-06 19:16:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4016 transitions. [2019-11-06 19:16:01,654 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4016 transitions. Word has length 157 [2019-11-06 19:16:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:01,657 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 4016 transitions. [2019-11-06 19:16:01,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:16:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4016 transitions. [2019-11-06 19:16:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-11-06 19:16:01,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:01,663 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:01,663 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:01,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2140205233, now seen corresponding path program 1 times [2019-11-06 19:16:01,664 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:01,664 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603217734] [2019-11-06 19:16:01,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:02,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603217734] [2019-11-06 19:16:02,148 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32955763] [2019-11-06 19:16:02,148 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 19:16:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:02,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:02,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:02,461 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:16:02,461 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:16:02,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980426013] [2019-11-06 19:16:02,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:16:02,463 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:02,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:16:02,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:02,463 INFO L87 Difference]: Start difference. First operand 2934 states and 4016 transitions. Second operand 3 states. [2019-11-06 19:16:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:04,618 INFO L93 Difference]: Finished difference Result 7426 states and 10578 transitions. [2019-11-06 19:16:04,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:16:04,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 345 [2019-11-06 19:16:04,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:04,643 INFO L225 Difference]: With dead ends: 7426 [2019-11-06 19:16:04,643 INFO L226 Difference]: Without dead ends: 4498 [2019-11-06 19:16:04,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2019-11-06 19:16:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4495. [2019-11-06 19:16:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4495 states. [2019-11-06 19:16:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 6012 transitions. [2019-11-06 19:16:04,829 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 6012 transitions. Word has length 345 [2019-11-06 19:16:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:04,832 INFO L462 AbstractCegarLoop]: Abstraction has 4495 states and 6012 transitions. [2019-11-06 19:16:04,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:16:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 6012 transitions. [2019-11-06 19:16:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2019-11-06 19:16:04,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:04,844 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:05,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:05,048 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:05,048 INFO L82 PathProgramCache]: Analyzing trace with hash 903358243, now seen corresponding path program 1 times [2019-11-06 19:16:05,049 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:05,049 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162347698] [2019-11-06 19:16:05,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-06 19:16:05,563 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162347698] [2019-11-06 19:16:05,563 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955755784] [2019-11-06 19:16:05,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:05,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:05,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 359 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:16:06,138 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:16:06,138 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:16:06,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039812906] [2019-11-06 19:16:06,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:16:06,141 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:06,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:16:06,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:16:06,142 INFO L87 Difference]: Start difference. First operand 4495 states and 6012 transitions. Second operand 11 states.