/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/Problem12_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:11:58,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:11:58,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:11:58,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:11:58,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:11:58,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:11:58,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:11:58,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:11:58,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:11:58,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:11:58,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:11:58,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:11:58,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:11:58,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:11:58,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:11:58,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:11:58,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:11:58,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:11:58,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:11:58,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:11:58,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:11:58,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:11:58,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:11:58,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:11:58,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:11:58,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:11:58,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:11:58,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:11:58,086 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 19:11:58,122 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:11:58,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:11:58,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:11:58,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:11:58,124 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:11:58,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:11:58,128 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:11:58,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:11:58,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:11:58,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:11:58,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:11:58,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:11:58,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:11:58,130 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:11:58,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:11:58,130 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:11:58,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:11:58,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:11:58,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:11:58,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:11:58,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:11:58,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:11:58,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:11:58,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:11:58,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:11:58,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:11:58,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:11:58,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:11:58,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:11:58,453 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:11:58,467 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:11:58,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:11:58,472 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:11:58,472 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:11:58,473 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label59.c [2019-11-06 19:11:58,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010d29c48/dfd74cb015ad4883b53308d6e338c833/FLAG8a18ed6ef [2019-11-06 19:11:59,263 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:11:59,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label59.c [2019-11-06 19:11:59,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010d29c48/dfd74cb015ad4883b53308d6e338c833/FLAG8a18ed6ef [2019-11-06 19:11:59,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/010d29c48/dfd74cb015ad4883b53308d6e338c833 [2019-11-06 19:11:59,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:11:59,426 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:11:59,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:11:59,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:11:59,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:11:59,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:11:59" (1/1) ... [2019-11-06 19:11:59,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c825d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:59, skipping insertion in model container [2019-11-06 19:11:59,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:11:59" (1/1) ... [2019-11-06 19:11:59,448 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:11:59,606 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:12:01,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:01,042 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:12:01,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:01,817 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:12:01,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:01 WrapperNode [2019-11-06 19:12:01,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:01,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:12:01,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:12:01,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:12:01,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:01" (1/1) ... [2019-11-06 19:12:01,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:01" (1/1) ... [2019-11-06 19:12:01,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:01" (1/1) ... [2019-11-06 19:12:01,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:01" (1/1) ... [2019-11-06 19:12:02,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:01" (1/1) ... [2019-11-06 19:12:02,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:01" (1/1) ... [2019-11-06 19:12:02,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:01" (1/1) ... [2019-11-06 19:12:02,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:12:02,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:12:02,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:12:02,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:12:02,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:01" (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 19:12:02,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:12:02,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:12:02,236 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:12:02,236 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:12:02,236 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:12:02,236 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 19:12:02,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:12:02,236 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:12:02,237 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:12:02,237 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:12:02,237 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 19:12:02,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:12:02,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:12:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:12:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:12:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:12:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:12:06,884 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:12:06,885 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:12:06,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:06 BoogieIcfgContainer [2019-11-06 19:12:06,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:12:06,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:12:06,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:12:06,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:12:06,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:11:59" (1/3) ... [2019-11-06 19:12:06,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0cbe80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:06, skipping insertion in model container [2019-11-06 19:12:06,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:01" (2/3) ... [2019-11-06 19:12:06,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0cbe80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:06, skipping insertion in model container [2019-11-06 19:12:06,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:06" (3/3) ... [2019-11-06 19:12:06,907 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label59.c [2019-11-06 19:12:06,918 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:12:06,928 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:12:06,940 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:12:06,985 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:12:06,985 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:12:06,985 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:12:06,985 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:12:06,986 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:12:06,986 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:12:06,986 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:12:06,986 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:12:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-11-06 19:12:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 19:12:07,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:07,043 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] [2019-11-06 19:12:07,045 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:07,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1317683707, now seen corresponding path program 1 times [2019-11-06 19:12:07,062 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:07,063 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851741807] [2019-11-06 19:12:07,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:07,498 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 19:12:07,499 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851741807] [2019-11-06 19:12:07,500 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:07,500 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:12:07,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188253164] [2019-11-06 19:12:07,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:12:07,507 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:07,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:12:07,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:12:07,525 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-11-06 19:12:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:17,352 INFO L93 Difference]: Finished difference Result 2471 states and 4736 transitions. [2019-11-06 19:12:17,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 19:12:17,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2019-11-06 19:12:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:17,386 INFO L225 Difference]: With dead ends: 2471 [2019-11-06 19:12:17,387 INFO L226 Difference]: Without dead ends: 1568 [2019-11-06 19:12:17,400 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:12:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2019-11-06 19:12:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1553. [2019-11-06 19:12:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2019-11-06 19:12:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2863 transitions. [2019-11-06 19:12:17,561 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2863 transitions. Word has length 50 [2019-11-06 19:12:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:17,562 INFO L462 AbstractCegarLoop]: Abstraction has 1553 states and 2863 transitions. [2019-11-06 19:12:17,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2863 transitions. [2019-11-06 19:12:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 19:12:17,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:17,574 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:17,574 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:17,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:17,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2146866983, now seen corresponding path program 1 times [2019-11-06 19:12:17,575 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:17,575 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136820236] [2019-11-06 19:12:17,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:17,947 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136820236] [2019-11-06 19:12:17,947 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:17,948 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:12:17,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884341994] [2019-11-06 19:12:17,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:12:17,950 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:17,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:12:17,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:17,951 INFO L87 Difference]: Start difference. First operand 1553 states and 2863 transitions. Second operand 7 states. [2019-11-06 19:12:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:27,654 INFO L93 Difference]: Finished difference Result 4757 states and 8776 transitions. [2019-11-06 19:12:27,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:12:27,655 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 119 [2019-11-06 19:12:27,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:27,687 INFO L225 Difference]: With dead ends: 4757 [2019-11-06 19:12:27,687 INFO L226 Difference]: Without dead ends: 3210 [2019-11-06 19:12:27,693 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:12:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2019-11-06 19:12:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3139. [2019-11-06 19:12:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3139 states. [2019-11-06 19:12:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 5141 transitions. [2019-11-06 19:12:27,840 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 5141 transitions. Word has length 119 [2019-11-06 19:12:27,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:27,843 INFO L462 AbstractCegarLoop]: Abstraction has 3139 states and 5141 transitions. [2019-11-06 19:12:27,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:12:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 5141 transitions. [2019-11-06 19:12:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 19:12:27,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:27,859 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:27,859 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1546476435, now seen corresponding path program 1 times [2019-11-06 19:12:27,861 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:27,862 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617018462] [2019-11-06 19:12:27,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:28,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617018462] [2019-11-06 19:12:28,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347683713] [2019-11-06 19:12:28,173 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 19:12:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:28,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:28,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:28,385 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:28,386 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-11-06 19:12:28,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998122648] [2019-11-06 19:12:28,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:28,389 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:28,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:28,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:12:28,398 INFO L87 Difference]: Start difference. First operand 3139 states and 5141 transitions. Second operand 3 states. [2019-11-06 19:12:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:33,588 INFO L93 Difference]: Finished difference Result 9397 states and 15613 transitions. [2019-11-06 19:12:33,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:33,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-11-06 19:12:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:33,623 INFO L225 Difference]: With dead ends: 9397 [2019-11-06 19:12:33,623 INFO L226 Difference]: Without dead ends: 6264 [2019-11-06 19:12:33,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:12:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6264 states. [2019-11-06 19:12:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6264 to 6264. [2019-11-06 19:12:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6264 states. [2019-11-06 19:12:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 9148 transitions. [2019-11-06 19:12:33,865 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 9148 transitions. Word has length 125 [2019-11-06 19:12:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:33,868 INFO L462 AbstractCegarLoop]: Abstraction has 6264 states and 9148 transitions. [2019-11-06 19:12:33,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 9148 transitions. [2019-11-06 19:12:33,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 19:12:33,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:33,879 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:34,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:34,083 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:34,084 INFO L82 PathProgramCache]: Analyzing trace with hash 856168640, now seen corresponding path program 1 times [2019-11-06 19:12:34,084 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:34,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013825148] [2019-11-06 19:12:34,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:34,432 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013825148] [2019-11-06 19:12:34,432 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:34,432 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:12:34,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728922225] [2019-11-06 19:12:34,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:12:34,434 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:12:34,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:12:34,436 INFO L87 Difference]: Start difference. First operand 6264 states and 9148 transitions. Second operand 9 states.