/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/Problem16_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:19:33,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:19:33,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:19:33,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:19:33,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:19:33,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:19:33,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:19:33,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:19:33,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:19:33,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:19:33,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:19:33,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:19:33,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:19:33,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:19:33,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:19:33,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:19:33,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:19:33,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:19:33,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:19:33,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:19:33,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:19:33,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:19:33,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:19:33,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:19:33,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:19:33,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:19:33,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:19:33,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:19:33,278 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 19:19:33,294 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:19:33,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:19:33,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:19:33,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:19:33,297 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:19:33,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:19:33,298 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:19:33,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:19:33,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:19:33,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:19:33,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:19:33,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:19:33,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:19:33,300 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:19:33,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:19:33,301 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:19:33,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:19:33,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:19:33,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:19:33,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:19:33,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:19:33,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:19:33,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:19:33,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:19:33,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:19:33,303 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:19:33,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:19:33,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:19:33,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:19:33,580 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:19:33,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:19:33,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:19:33,607 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:19:33,607 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:19:33,608 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label56.c [2019-11-06 19:19:33,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86a8cdfb9/9ffd4a27cbad4804927c2f50f7a52eb4/FLAG4fcf1a043 [2019-11-06 19:19:34,333 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:19:34,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label56.c [2019-11-06 19:19:34,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86a8cdfb9/9ffd4a27cbad4804927c2f50f7a52eb4/FLAG4fcf1a043 [2019-11-06 19:19:34,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86a8cdfb9/9ffd4a27cbad4804927c2f50f7a52eb4 [2019-11-06 19:19:34,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:19:34,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:19:34,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:34,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:19:34,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:19:34,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:34" (1/1) ... [2019-11-06 19:19:34,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485597a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:34, skipping insertion in model container [2019-11-06 19:19:34,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:34" (1/1) ... [2019-11-06 19:19:34,515 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:19:34,578 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:19:35,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:35,396 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:19:35,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:35,658 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:19:35,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:35 WrapperNode [2019-11-06 19:19:35,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:35,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:19:35,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:19:35,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:19:35,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:35" (1/1) ... [2019-11-06 19:19:35,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:35" (1/1) ... [2019-11-06 19:19:35,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:35" (1/1) ... [2019-11-06 19:19:35,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:35" (1/1) ... [2019-11-06 19:19:35,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:35" (1/1) ... [2019-11-06 19:19:35,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:35" (1/1) ... [2019-11-06 19:19:35,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:35" (1/1) ... [2019-11-06 19:19:35,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:19:35,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:19:35,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:19:35,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:19:35,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:35" (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 19:19:35,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:19:35,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:19:35,952 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:19:35,952 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:19:35,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:19:35,952 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:19:35,953 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:19:35,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:19:35,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:19:35,953 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:19:35,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:19:35,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:19:35,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:38,423 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:38,423 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:38,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:38 BoogieIcfgContainer [2019-11-06 19:19:38,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:38,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:38,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:38,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:38,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:19:34" (1/3) ... [2019-11-06 19:19:38,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16cb3c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:38, skipping insertion in model container [2019-11-06 19:19:38,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:35" (2/3) ... [2019-11-06 19:19:38,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16cb3c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:38, skipping insertion in model container [2019-11-06 19:19:38,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:38" (3/3) ... [2019-11-06 19:19:38,435 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label56.c [2019-11-06 19:19:38,446 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:38,456 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:38,468 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:38,506 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:38,506 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:38,507 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:38,507 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:38,507 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:38,508 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:38,508 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:38,508 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 19:19:38,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:38,542 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] [2019-11-06 19:19:38,544 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash -645226158, now seen corresponding path program 1 times [2019-11-06 19:19:38,559 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:38,559 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061352621] [2019-11-06 19:19:38,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:38,889 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 19:19:38,890 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061352621] [2019-11-06 19:19:38,891 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:38,891 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:38,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106285604] [2019-11-06 19:19:38,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:38,898 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:38,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:38,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:38,914 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:44,369 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:19:44,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:44,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-11-06 19:19:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:44,406 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:19:44,406 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:44,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:19:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-11-06 19:19:44,527 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 39 [2019-11-06 19:19:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:44,528 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-11-06 19:19:44,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-11-06 19:19:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-11-06 19:19:44,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:44,542 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:19:44,542 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:44,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:44,542 INFO L82 PathProgramCache]: Analyzing trace with hash 760162007, now seen corresponding path program 1 times [2019-11-06 19:19:44,543 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:44,543 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518856776] [2019-11-06 19:19:44,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:44,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518856776] [2019-11-06 19:19:44,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357976989] [2019-11-06 19:19:44,993 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 19:19:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:45,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:45,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 19:19:45,279 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:45,279 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:19:45,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666177119] [2019-11-06 19:19:45,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:45,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:45,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:45,286 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-11-06 19:19:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:48,388 INFO L93 Difference]: Finished difference Result 3133 states and 5148 transitions. [2019-11-06 19:19:48,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:48,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2019-11-06 19:19:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:48,403 INFO L225 Difference]: With dead ends: 3133 [2019-11-06 19:19:48,403 INFO L226 Difference]: Without dead ends: 2108 [2019-11-06 19:19:48,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:19:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2019-11-06 19:19:48,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2078. [2019-11-06 19:19:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-11-06 19:19:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3240 transitions. [2019-11-06 19:19:48,485 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3240 transitions. Word has length 206 [2019-11-06 19:19:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:48,486 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3240 transitions. [2019-11-06 19:19:48,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:48,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3240 transitions. [2019-11-06 19:19:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-11-06 19:19:48,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:48,493 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:19:48,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:48,697 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:48,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:48,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1337668705, now seen corresponding path program 1 times [2019-11-06 19:19:48,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:48,699 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921025396] [2019-11-06 19:19:48,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:49,030 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921025396] [2019-11-06 19:19:49,030 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011230617] [2019-11-06 19:19:49,030 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 19:19:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:49,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:49,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 19:19:49,290 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:49,290 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:49,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633296389] [2019-11-06 19:19:49,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:49,298 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:49,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:49,298 INFO L87 Difference]: Start difference. First operand 2078 states and 3240 transitions. Second operand 5 states. [2019-11-06 19:19:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:52,448 INFO L93 Difference]: Finished difference Result 6302 states and 10082 transitions. [2019-11-06 19:19:52,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:52,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2019-11-06 19:19:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:52,474 INFO L225 Difference]: With dead ends: 6302 [2019-11-06 19:19:52,474 INFO L226 Difference]: Without dead ends: 4230 [2019-11-06 19:19:52,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-11-06 19:19:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-11-06 19:19:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-11-06 19:19:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5868 transitions. [2019-11-06 19:19:52,619 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5868 transitions. Word has length 210 [2019-11-06 19:19:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:52,621 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5868 transitions. [2019-11-06 19:19:52,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5868 transitions. [2019-11-06 19:19:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2019-11-06 19:19:52,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:52,629 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:52,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:52,841 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash 899625711, now seen corresponding path program 1 times [2019-11-06 19:19:52,842 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:52,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136530932] [2019-11-06 19:19:52,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 177 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 19:19:53,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136530932] [2019-11-06 19:19:53,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561347068] [2019-11-06 19:19:53,290 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 19:19:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:53,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 19:19:53,628 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:53,628 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:19:53,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775252372] [2019-11-06 19:19:53,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:53,630 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:53,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:53,630 INFO L87 Difference]: Start difference. First operand 4208 states and 5868 transitions. Second operand 11 states. [2019-11-06 19:19:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:58,176 INFO L93 Difference]: Finished difference Result 10864 states and 15768 transitions. [2019-11-06 19:19:58,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:58,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 314 [2019-11-06 19:19:58,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:58,218 INFO L225 Difference]: With dead ends: 10864 [2019-11-06 19:19:58,219 INFO L226 Difference]: Without dead ends: 6662 [2019-11-06 19:19:58,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:19:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-11-06 19:19:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4930. [2019-11-06 19:19:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4930 states. [2019-11-06 19:19:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 6891 transitions. [2019-11-06 19:19:58,387 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 6891 transitions. Word has length 314 [2019-11-06 19:19:58,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:58,388 INFO L462 AbstractCegarLoop]: Abstraction has 4930 states and 6891 transitions. [2019-11-06 19:19:58,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:19:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 6891 transitions. [2019-11-06 19:19:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-11-06 19:19:58,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:58,397 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 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 19:19:58,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:58,602 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:58,603 INFO L82 PathProgramCache]: Analyzing trace with hash 410038599, now seen corresponding path program 1 times [2019-11-06 19:19:58,606 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:58,606 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054031945] [2019-11-06 19:19:58,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 96 proven. 206 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-06 19:19:59,249 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054031945] [2019-11-06 19:19:59,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897957080] [2019-11-06 19:19:59,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:59,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:59,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2019-11-06 19:19:59,589 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:59,589 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:59,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286212405] [2019-11-06 19:19:59,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:59,590 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:59,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:59,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:59,591 INFO L87 Difference]: Start difference. First operand 4930 states and 6891 transitions. Second operand 5 states. [2019-11-06 19:20:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:02,454 INFO L93 Difference]: Finished difference Result 11257 states and 15760 transitions. [2019-11-06 19:20:02,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:20:02,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 390 [2019-11-06 19:20:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:02,484 INFO L225 Difference]: With dead ends: 11257 [2019-11-06 19:20:02,484 INFO L226 Difference]: Without dead ends: 6333 [2019-11-06 19:20:02,497 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:20:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2019-11-06 19:20:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 6307. [2019-11-06 19:20:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6307 states. [2019-11-06 19:20:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 8081 transitions. [2019-11-06 19:20:02,651 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 8081 transitions. Word has length 390 [2019-11-06 19:20:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:02,651 INFO L462 AbstractCegarLoop]: Abstraction has 6307 states and 8081 transitions. [2019-11-06 19:20:02,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:20:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 8081 transitions. [2019-11-06 19:20:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2019-11-06 19:20:02,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:02,664 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:02,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:20:02,868 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:02,868 INFO L82 PathProgramCache]: Analyzing trace with hash 693084043, now seen corresponding path program 1 times [2019-11-06 19:20:02,871 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:02,871 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893594913] [2019-11-06 19:20:02,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 212 proven. 100 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-06 19:20:04,030 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893594913] [2019-11-06 19:20:04,030 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50637428] [2019-11-06 19:20:04,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:20:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:04,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:20:04,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 378 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 19:20:04,519 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:20:04,519 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:20:04,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954674076] [2019-11-06 19:20:04,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:20:04,522 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:04,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:20:04,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:20:04,523 INFO L87 Difference]: Start difference. First operand 6307 states and 8081 transitions. Second operand 11 states.