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_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:01:36,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:01:36,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:01:36,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:01:36,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:01:36,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:01:36,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:01:36,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:01:36,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:01:36,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:01:36,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:01:36,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:01:36,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:01:36,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:01:36,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:01:36,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:01:36,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:01:36,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:01:36,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:01:36,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:01:36,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:01:36,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:01:36,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:01:36,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:01:36,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:01:36,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:01:36,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:01:36,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:01:36,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:01:36,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:01:36,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:01:36,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:01:36,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:01:36,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:01:36,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:01:36,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:01:36,513 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 [2019-10-13 18:01:36,540 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:01:36,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:01:36,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:01:36,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:01:36,542 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:01:36,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:01:36,542 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:01:36,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:01:36,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:01:36,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:01:36,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:01:36,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:01:36,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:01:36,543 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:01:36,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:01:36,544 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:01:36,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:01:36,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:01:36,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:01:36,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:01:36,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:01:36,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:01:36,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:01:36,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:01:36,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:01:36,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:01:36,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:01:36,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:01:36,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:01:36,820 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:01:36,840 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:01:36,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:01:36,844 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:01:36,844 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:01:36,844 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label45.c [2019-10-13 18:01:36,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166f19f8c/e7ea275007c343879430fb6ffbdbd865/FLAG94c455ca9 [2019-10-13 18:01:37,708 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:01:37,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label45.c [2019-10-13 18:01:37,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166f19f8c/e7ea275007c343879430fb6ffbdbd865/FLAG94c455ca9 [2019-10-13 18:01:38,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166f19f8c/e7ea275007c343879430fb6ffbdbd865 [2019-10-13 18:01:38,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:01:38,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:01:38,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:38,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:01:38,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:01:38,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:38" (1/1) ... [2019-10-13 18:01:38,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166b0bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:38, skipping insertion in model container [2019-10-13 18:01:38,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:38" (1/1) ... [2019-10-13 18:01:38,259 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:01:38,406 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:01:39,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:39,772 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:01:40,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:40,414 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:01:40,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:40 WrapperNode [2019-10-13 18:01:40,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:40,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:01:40,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:01:40,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:01:40,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:40" (1/1) ... [2019-10-13 18:01:40,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:40" (1/1) ... [2019-10-13 18:01:40,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:40" (1/1) ... [2019-10-13 18:01:40,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:40" (1/1) ... [2019-10-13 18:01:40,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:40" (1/1) ... [2019-10-13 18:01:40,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:40" (1/1) ... [2019-10-13 18:01:40,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:40" (1/1) ... [2019-10-13 18:01:40,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:01:40,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:01:40,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:01:40,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:01:40,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:40" (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 [2019-10-13 18:01:40,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:01:40,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:01:40,732 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:01:40,733 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:01:40,733 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:01:40,733 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 18:01:40,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:01:40,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:01:40,734 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:01:40,734 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:01:40,734 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 18:01:40,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:01:40,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:01:40,735 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:01:40,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:01:40,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:01:40,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:01:45,425 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:01:45,426 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:01:45,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:01:45 BoogieIcfgContainer [2019-10-13 18:01:45,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:01:45,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:01:45,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:01:45,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:01:45,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:01:38" (1/3) ... [2019-10-13 18:01:45,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7248110a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:01:45, skipping insertion in model container [2019-10-13 18:01:45,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:40" (2/3) ... [2019-10-13 18:01:45,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7248110a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:01:45, skipping insertion in model container [2019-10-13 18:01:45,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:01:45" (3/3) ... [2019-10-13 18:01:45,443 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label45.c [2019-10-13 18:01:45,455 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:01:45,467 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:01:45,479 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:01:45,523 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:01:45,524 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:01:45,524 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:01:45,524 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:01:45,524 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:01:45,524 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:01:45,525 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:01:45,525 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:01:45,565 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 18:01:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 18:01:45,577 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:45,578 INFO L380 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] [2019-10-13 18:01:45,581 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:45,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:45,588 INFO L82 PathProgramCache]: Analyzing trace with hash -157974758, now seen corresponding path program 1 times [2019-10-13 18:01:45,597 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:45,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809549201] [2019-10-13 18:01:45,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:45,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:45,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:46,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809549201] [2019-10-13 18:01:46,029 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:46,029 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:01:46,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42131439] [2019-10-13 18:01:46,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:01:46,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:01:46,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:01:46,053 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-10-13 18:01:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:57,869 INFO L93 Difference]: Finished difference Result 3253 states and 6294 transitions. [2019-10-13 18:01:57,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:01:57,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-10-13 18:01:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:57,903 INFO L225 Difference]: With dead ends: 3253 [2019-10-13 18:01:57,903 INFO L226 Difference]: Without dead ends: 2346 [2019-10-13 18:01:57,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:01:57,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2019-10-13 18:01:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2331. [2019-10-13 18:01:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2331 states. [2019-10-13 18:01:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3787 transitions. [2019-10-13 18:01:58,108 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3787 transitions. Word has length 57 [2019-10-13 18:01:58,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:58,111 INFO L462 AbstractCegarLoop]: Abstraction has 2331 states and 3787 transitions. [2019-10-13 18:01:58,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:58,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3787 transitions. [2019-10-13 18:01:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 18:01:58,131 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:58,132 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:01:58,132 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1774223795, now seen corresponding path program 1 times [2019-10-13 18:01:58,133 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:58,133 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856572334] [2019-10-13 18:01:58,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:58,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:58,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:58,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856572334] [2019-10-13 18:01:58,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116316771] [2019-10-13 18:01:58,437 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 [2019-10-13 18:01:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:58,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 18:01:58,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:01:58,696 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:58,696 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-13 18:01:58,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537383508] [2019-10-13 18:01:58,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:01:58,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:58,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:01:58,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:01:58,703 INFO L87 Difference]: Start difference. First operand 2331 states and 3787 transitions. Second operand 8 states.