/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/Problem18_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:20:16,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:20:16,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:20:16,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:20:16,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:20:16,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:20:16,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:20:16,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:20:16,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:20:16,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:20:16,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:20:16,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:20:16,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:20:16,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:20:16,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:20:16,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:20:16,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:20:16,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:20:16,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:20:16,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:20:16,074 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 19:20:16,088 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:20:16,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:20:16,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:20:16,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:20:16,090 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:20:16,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:20:16,090 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:20:16,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:20:16,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:20:16,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:20:16,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:20:16,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:20:16,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:20:16,091 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:20:16,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:20:16,092 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:20:16,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:20:16,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:20:16,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:20:16,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:20:16,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:20:16,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:20:16,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:20:16,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:20:16,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:20:16,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:20:16,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:20:16,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:20:16,094 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:20:16,372 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:20:16,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:20:16,387 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:20:16,389 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:20:16,389 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:20:16,392 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-11-06 19:20:16,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f123a04/19ea6a0ecbb644f0a8ab402677e724b1/FLAG594538755 [2019-11-06 19:20:17,178 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:20:17,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-11-06 19:20:17,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f123a04/19ea6a0ecbb644f0a8ab402677e724b1/FLAG594538755 [2019-11-06 19:20:17,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f123a04/19ea6a0ecbb644f0a8ab402677e724b1 [2019-11-06 19:20:17,284 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:20:17,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:20:17,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:17,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:20:17,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:20:17,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:17" (1/1) ... [2019-11-06 19:20:17,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e5946d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:17, skipping insertion in model container [2019-11-06 19:20:17,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:17" (1/1) ... [2019-11-06 19:20:17,304 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:20:17,443 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:20:18,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:18,752 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:20:19,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:19,226 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:20:19,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:19 WrapperNode [2019-11-06 19:20:19,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:19,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:20:19,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:20:19,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:20:19,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:19" (1/1) ... [2019-11-06 19:20:19,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:19" (1/1) ... [2019-11-06 19:20:19,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:19" (1/1) ... [2019-11-06 19:20:19,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:19" (1/1) ... [2019-11-06 19:20:19,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:19" (1/1) ... [2019-11-06 19:20:19,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:19" (1/1) ... [2019-11-06 19:20:19,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:19" (1/1) ... [2019-11-06 19:20:19,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:20:19,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:20:19,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:20:19,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:20:19,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:19" (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 19:20:19,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:20:19,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:20:19,598 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:20:19,598 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:20:19,599 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:20:19,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:20:19,599 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:20:19,599 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:20:19,599 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:20:19,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:20:19,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:20:19,600 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:20:19,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:20:19,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:20:19,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:20:23,554 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:20:23,555 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:20:23,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:23 BoogieIcfgContainer [2019-11-06 19:20:23,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:20:23,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:20:23,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:20:23,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:20:23,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:20:17" (1/3) ... [2019-11-06 19:20:23,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66907145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:23, skipping insertion in model container [2019-11-06 19:20:23,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:19" (2/3) ... [2019-11-06 19:20:23,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66907145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:23, skipping insertion in model container [2019-11-06 19:20:23,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:23" (3/3) ... [2019-11-06 19:20:23,565 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label17.c [2019-11-06 19:20:23,574 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:20:23,583 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:20:23,594 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:20:23,627 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:20:23,627 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:20:23,627 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:20:23,628 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:20:23,628 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:20:23,628 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:20:23,628 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:20:23,628 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:20:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:20:23,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 19:20:23,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:23,671 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] [2019-11-06 19:20:23,673 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:23,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1487272786, now seen corresponding path program 1 times [2019-11-06 19:20:23,690 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:23,690 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930062330] [2019-11-06 19:20:23,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:24,133 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 19:20:24,133 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930062330] [2019-11-06 19:20:24,134 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:24,134 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:20:24,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77830104] [2019-11-06 19:20:24,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:20:24,142 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:24,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:20:24,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:20:24,160 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:20:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:35,075 INFO L93 Difference]: Finished difference Result 3000 states and 5782 transitions. [2019-11-06 19:20:35,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:20:35,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-11-06 19:20:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:35,117 INFO L225 Difference]: With dead ends: 3000 [2019-11-06 19:20:35,117 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:20:35,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:20:35,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:20:35,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2138. [2019-11-06 19:20:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2138 states. [2019-11-06 19:20:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3501 transitions. [2019-11-06 19:20:35,327 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3501 transitions. Word has length 37 [2019-11-06 19:20:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:35,329 INFO L462 AbstractCegarLoop]: Abstraction has 2138 states and 3501 transitions. [2019-11-06 19:20:35,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:20:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3501 transitions. [2019-11-06 19:20:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 19:20:35,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:35,339 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:35,339 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash -270817417, now seen corresponding path program 1 times [2019-11-06 19:20:35,340 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:35,340 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98486246] [2019-11-06 19:20:35,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:35,718 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98486246] [2019-11-06 19:20:35,718 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:35,719 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:20:35,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329249601] [2019-11-06 19:20:35,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:20:35,725 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:35,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:20:35,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:20:35,726 INFO L87 Difference]: Start difference. First operand 2138 states and 3501 transitions. Second operand 8 states. [2019-11-06 19:20:46,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:46,388 INFO L93 Difference]: Finished difference Result 8664 states and 14432 transitions. [2019-11-06 19:20:46,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:20:46,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2019-11-06 19:20:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:46,428 INFO L225 Difference]: With dead ends: 8664 [2019-11-06 19:20:46,429 INFO L226 Difference]: Without dead ends: 6532 [2019-11-06 19:20:46,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:20:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2019-11-06 19:20:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6511. [2019-11-06 19:20:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6511 states. [2019-11-06 19:20:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 9250 transitions. [2019-11-06 19:20:46,640 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 9250 transitions. Word has length 106 [2019-11-06 19:20:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:46,641 INFO L462 AbstractCegarLoop]: Abstraction has 6511 states and 9250 transitions. [2019-11-06 19:20:46,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:20:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 9250 transitions. [2019-11-06 19:20:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-11-06 19:20:46,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:46,655 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:20:46,656 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:46,656 INFO L82 PathProgramCache]: Analyzing trace with hash 126242006, now seen corresponding path program 1 times [2019-11-06 19:20:46,657 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:46,658 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918543370] [2019-11-06 19:20:46,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:20:47,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918543370] [2019-11-06 19:20:47,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583381200] [2019-11-06 19:20:47,253 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 19:20:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:47,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:20:47,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:47,499 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:20:47,499 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:20:47,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769054685] [2019-11-06 19:20:47,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:20:47,501 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:20:47,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:20:47,502 INFO L87 Difference]: Start difference. First operand 6511 states and 9250 transitions. Second operand 11 states.