/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_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:18:18,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:18:18,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:18:18,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:18:18,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:18:18,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:18:18,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:18:18,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:18:18,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:18:18,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:18:18,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:18:18,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:18:18,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:18:18,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:18:18,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:18:18,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:18:18,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:18:18,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:18:18,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:18:18,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:18:18,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:18:18,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:18:18,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:18:18,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:18:18,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:18:18,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:18:18,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:18:18,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:18:18,398 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 19:18:18,413 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:18:18,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:18:18,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:18:18,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:18:18,415 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:18:18,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:18:18,415 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:18:18,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:18:18,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:18:18,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:18:18,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:18:18,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:18:18,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:18:18,417 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:18:18,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:18:18,417 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:18:18,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:18:18,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:18:18,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:18:18,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:18:18,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:18:18,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:18:18,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:18:18,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:18:18,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:18:18,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:18:18,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:18:18,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:18:18,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:18:18,719 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:18:18,738 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:18:18,742 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:18:18,743 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:18:18,744 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:18:18,744 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label28.c [2019-11-06 19:18:18,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bdbc2585/9aa86a607e7b44ccba4679900203419a/FLAG0e5e5d1f8 [2019-11-06 19:18:19,493 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:18:19,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label28.c [2019-11-06 19:18:19,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bdbc2585/9aa86a607e7b44ccba4679900203419a/FLAG0e5e5d1f8 [2019-11-06 19:18:19,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bdbc2585/9aa86a607e7b44ccba4679900203419a [2019-11-06 19:18:19,678 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:18:19,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:18:19,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:19,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:18:19,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:18:19,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:19" (1/1) ... [2019-11-06 19:18:19,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f9a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:19, skipping insertion in model container [2019-11-06 19:18:19,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:19" (1/1) ... [2019-11-06 19:18:19,696 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:18:19,776 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:18:20,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:20,556 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:18:20,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:20,929 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:18:20,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20 WrapperNode [2019-11-06 19:18:20,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:20,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:18:20,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:18:20,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:18:20,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:20,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:20,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:20,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:21,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:21,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:21,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:21,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:18:21,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:18:21,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:18:21,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:18:21,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20" (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 19:18:21,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:18:21,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:18:21,182 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:18:21,183 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:18:21,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:18:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:18:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:18:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:18:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:18:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:18:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:18:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:18:21,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:18:23,585 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:18:23,586 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:18:23,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:23 BoogieIcfgContainer [2019-11-06 19:18:23,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:18:23,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:18:23,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:18:23,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:18:23,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:18:19" (1/3) ... [2019-11-06 19:18:23,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db37e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:23, skipping insertion in model container [2019-11-06 19:18:23,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20" (2/3) ... [2019-11-06 19:18:23,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db37e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:23, skipping insertion in model container [2019-11-06 19:18:23,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:23" (3/3) ... [2019-11-06 19:18:23,608 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label28.c [2019-11-06 19:18:23,618 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:18:23,628 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:18:23,639 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:18:23,681 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:18:23,681 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:18:23,681 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:18:23,682 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:18:23,682 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:18:23,682 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:18:23,682 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:18:23,682 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:18:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:18:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 19:18:23,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:23,735 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:23,736 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash 259572933, now seen corresponding path program 1 times [2019-11-06 19:18:23,752 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:23,752 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239613761] [2019-11-06 19:18:23,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:24,258 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 19:18:24,258 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239613761] [2019-11-06 19:18:24,259 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:24,260 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:18:24,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797198661] [2019-11-06 19:18:24,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:24,269 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:24,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:24,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:18:24,291 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:18:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:29,282 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:18:29,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:18:29,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2019-11-06 19:18:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:29,314 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:18:29,314 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:18:29,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 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 19:18:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:18:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:18:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:18:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-11-06 19:18:29,452 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 72 [2019-11-06 19:18:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:29,453 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-11-06 19:18:29,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-11-06 19:18:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-11-06 19:18:29,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:29,473 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:29,474 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1696196219, now seen corresponding path program 1 times [2019-11-06 19:18:29,475 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:29,475 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434503914] [2019-11-06 19:18:29,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 130 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:30,007 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434503914] [2019-11-06 19:18:30,007 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113375395] [2019-11-06 19:18:30,007 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 19:18:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:30,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:30,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 19:18:30,265 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:30,265 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:18:30,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780769889] [2019-11-06 19:18:30,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:30,272 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:30,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:30,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:30,273 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-11-06 19:18:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:33,591 INFO L93 Difference]: Finished difference Result 3131 states and 5064 transitions. [2019-11-06 19:18:33,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:33,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 254 [2019-11-06 19:18:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:33,605 INFO L225 Difference]: With dead ends: 3131 [2019-11-06 19:18:33,606 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 19:18:33,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 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 19:18:33,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 19:18:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2083. [2019-11-06 19:18:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-11-06 19:18:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3188 transitions. [2019-11-06 19:18:33,691 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3188 transitions. Word has length 254 [2019-11-06 19:18:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:33,692 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3188 transitions. [2019-11-06 19:18:33,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3188 transitions. [2019-11-06 19:18:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-11-06 19:18:33,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:33,702 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, 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] [2019-11-06 19:18:33,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:33,907 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1492798540, now seen corresponding path program 1 times [2019-11-06 19:18:33,908 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:33,908 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169988391] [2019-11-06 19:18:33,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 130 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:34,319 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169988391] [2019-11-06 19:18:34,319 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538163627] [2019-11-06 19:18:34,319 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 19:18:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:34,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:34,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 19:18:34,514 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:34,514 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:34,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182428248] [2019-11-06 19:18:34,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:34,515 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:34,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:34,516 INFO L87 Difference]: Start difference. First operand 2083 states and 3188 transitions. Second operand 5 states. [2019-11-06 19:18:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:37,247 INFO L93 Difference]: Finished difference Result 6311 states and 9957 transitions. [2019-11-06 19:18:37,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:37,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2019-11-06 19:18:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:37,275 INFO L225 Difference]: With dead ends: 6311 [2019-11-06 19:18:37,276 INFO L226 Difference]: Without dead ends: 4234 [2019-11-06 19:18:37,283 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 261 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 19:18:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-11-06 19:18:37,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-11-06 19:18:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-11-06 19:18:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5792 transitions. [2019-11-06 19:18:37,456 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5792 transitions. Word has length 261 [2019-11-06 19:18:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:37,456 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5792 transitions. [2019-11-06 19:18:37,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5792 transitions. [2019-11-06 19:18:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-11-06 19:18:37,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:37,463 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, 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, 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] [2019-11-06 19:18:37,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:37,672 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:37,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1800771228, now seen corresponding path program 1 times [2019-11-06 19:18:37,673 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:37,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245640533] [2019-11-06 19:18:37,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:18:38,075 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245640533] [2019-11-06 19:18:38,075 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138658548] [2019-11-06 19:18:38,075 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 19:18:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:38,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:38,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:38,376 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:38,376 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:18:38,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877521083] [2019-11-06 19:18:38,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:18:38,379 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:38,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:18:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:38,380 INFO L87 Difference]: Start difference. First operand 4198 states and 5792 transitions. Second operand 12 states. [2019-11-06 19:18:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:45,823 INFO L93 Difference]: Finished difference Result 13272 states and 19295 transitions. [2019-11-06 19:18:45,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 19:18:45,823 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 301 [2019-11-06 19:18:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:45,856 INFO L225 Difference]: With dead ends: 13272 [2019-11-06 19:18:45,856 INFO L226 Difference]: Without dead ends: 7642 [2019-11-06 19:18:45,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 309 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:18:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-11-06 19:18:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 6236. [2019-11-06 19:18:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6236 states. [2019-11-06 19:18:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 7162 transitions. [2019-11-06 19:18:46,036 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 7162 transitions. Word has length 301 [2019-11-06 19:18:46,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:46,038 INFO L462 AbstractCegarLoop]: Abstraction has 6236 states and 7162 transitions. [2019-11-06 19:18:46,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:18:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 7162 transitions. [2019-11-06 19:18:46,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2019-11-06 19:18:46,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:46,054 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:46,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:46,261 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:46,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1218994707, now seen corresponding path program 1 times [2019-11-06 19:18:46,262 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:46,262 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803827781] [2019-11-06 19:18:46,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 260 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-11-06 19:18:47,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803827781] [2019-11-06 19:18:47,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655607242] [2019-11-06 19:18:47,136 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 19:18:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:47,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:47,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 422 proven. 0 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-06 19:18:47,566 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:47,566 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:47,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093349618] [2019-11-06 19:18:47,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:47,568 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:47,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:47,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:47,568 INFO L87 Difference]: Start difference. First operand 6236 states and 7162 transitions. Second operand 5 states. [2019-11-06 19:18:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:49,255 INFO L93 Difference]: Finished difference Result 13846 states and 15934 transitions. [2019-11-06 19:18:49,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:18:49,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 570 [2019-11-06 19:18:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:49,282 INFO L225 Difference]: With dead ends: 13846 [2019-11-06 19:18:49,282 INFO L226 Difference]: Without dead ends: 7616 [2019-11-06 19:18:49,297 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 574 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2019-11-06 19:18:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7598. [2019-11-06 19:18:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7598 states. [2019-11-06 19:18:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7598 states to 7598 states and 8435 transitions. [2019-11-06 19:18:49,468 INFO L78 Accepts]: Start accepts. Automaton has 7598 states and 8435 transitions. Word has length 570 [2019-11-06 19:18:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:49,471 INFO L462 AbstractCegarLoop]: Abstraction has 7598 states and 8435 transitions. [2019-11-06 19:18:49,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:49,471 INFO L276 IsEmpty]: Start isEmpty. Operand 7598 states and 8435 transitions. [2019-11-06 19:18:49,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2019-11-06 19:18:49,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:49,506 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2019-11-06 19:18:49,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:49,710 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2045280105, now seen corresponding path program 1 times [2019-11-06 19:18:49,713 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:49,713 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393062010] [2019-11-06 19:18:49,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 380 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-11-06 19:18:51,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393062010] [2019-11-06 19:18:51,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159866306] [2019-11-06 19:18:51,069 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 19:18:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:51,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 714 proven. 2 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-11-06 19:18:51,740 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:51,741 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:51,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435351320] [2019-11-06 19:18:51,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:51,743 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:51,744 INFO L87 Difference]: Start difference. First operand 7598 states and 8435 transitions. Second operand 11 states.