/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/Problem11_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:09:01,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:09:01,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:09:01,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:09:01,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:09:01,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:09:01,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:09:01,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:09:01,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:09:01,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:09:01,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:09:01,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:09:01,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:09:01,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:09:01,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:09:01,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:09:01,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:09:01,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:09:01,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:09:01,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:09:01,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:09:01,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:09:01,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:09:01,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:09:01,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:09:01,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:09:01,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:09:01,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:09:01,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:09:01,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:09:01,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:09:01,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:09:01,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:09:01,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:09:01,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:09:01,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:09:01,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:09:01,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:09:01,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:09:01,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:09:01,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:09:01,369 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 19:09:01,402 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:09:01,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:09:01,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:09:01,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:09:01,404 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:09:01,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:09:01,407 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:09:01,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:09:01,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:09:01,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:09:01,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:09:01,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:09:01,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:09:01,408 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:09:01,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:09:01,409 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:09:01,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:09:01,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:09:01,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:09:01,410 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:09:01,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:09:01,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:09:01,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:09:01,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:09:01,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:09:01,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:09:01,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:09:01,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:09:01,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:09:01,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:09:01,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:09:01,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:09:01,702 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:09:01,703 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:09:01,703 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label29.c [2019-11-06 19:09:01,779 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7f2870c7/9f505927960f42eca278bd85e3138b5f/FLAG5d1321015 [2019-11-06 19:09:02,416 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:09:02,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label29.c [2019-11-06 19:09:02,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7f2870c7/9f505927960f42eca278bd85e3138b5f/FLAG5d1321015 [2019-11-06 19:09:02,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7f2870c7/9f505927960f42eca278bd85e3138b5f [2019-11-06 19:09:02,631 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:09:02,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:09:02,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:09:02,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:09:02,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:09:02,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:09:02" (1/1) ... [2019-11-06 19:09:02,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748e1f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:02, skipping insertion in model container [2019-11-06 19:09:02,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:09:02" (1/1) ... [2019-11-06 19:09:02,650 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:09:02,705 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:09:03,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:09:03,388 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:09:03,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:09:03,574 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:09:03,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:03 WrapperNode [2019-11-06 19:09:03,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:09:03,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:09:03,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:09:03,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:09:03,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:03" (1/1) ... [2019-11-06 19:09:03,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:03" (1/1) ... [2019-11-06 19:09:03,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:03" (1/1) ... [2019-11-06 19:09:03,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:03" (1/1) ... [2019-11-06 19:09:03,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:03" (1/1) ... [2019-11-06 19:09:03,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:03" (1/1) ... [2019-11-06 19:09:03,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:03" (1/1) ... [2019-11-06 19:09:03,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:09:03,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:09:03,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:09:03,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:09:03,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:03" (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 19:09:03,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:09:03,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:09:03,841 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:09:03,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:09:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:09:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:09:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:09:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:09:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:09:03,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:09:03,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:09:05,684 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:09:05,684 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:09:05,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:05 BoogieIcfgContainer [2019-11-06 19:09:05,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:09:05,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:09:05,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:09:05,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:09:05,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:09:02" (1/3) ... [2019-11-06 19:09:05,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdb211f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:05, skipping insertion in model container [2019-11-06 19:09:05,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:03" (2/3) ... [2019-11-06 19:09:05,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdb211f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:05, skipping insertion in model container [2019-11-06 19:09:05,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:05" (3/3) ... [2019-11-06 19:09:05,705 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label29.c [2019-11-06 19:09:05,721 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:09:05,734 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:09:05,770 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:09:05,816 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:09:05,816 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:09:05,816 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:09:05,817 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:09:05,817 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:09:05,817 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:09:05,817 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:09:05,817 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:09:05,861 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:09:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 19:09:05,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:05,870 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] [2019-11-06 19:09:05,872 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:05,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2007465363, now seen corresponding path program 1 times [2019-11-06 19:09:05,887 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:05,888 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179501171] [2019-11-06 19:09:05,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:06,205 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 19:09:06,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179501171] [2019-11-06 19:09:06,207 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:06,207 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:09:06,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755678195] [2019-11-06 19:09:06,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:06,213 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:06,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:06,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:09:06,230 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:09:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:08,487 INFO L93 Difference]: Finished difference Result 793 states and 1394 transitions. [2019-11-06 19:09:08,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 19:09:08,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-11-06 19:09:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:08,508 INFO L225 Difference]: With dead ends: 793 [2019-11-06 19:09:08,508 INFO L226 Difference]: Without dead ends: 437 [2019-11-06 19:09:08,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 19:09:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-11-06 19:09:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 422. [2019-11-06 19:09:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-11-06 19:09:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 673 transitions. [2019-11-06 19:09:08,600 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 673 transitions. Word has length 26 [2019-11-06 19:09:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:08,601 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 673 transitions. [2019-11-06 19:09:08,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 673 transitions. [2019-11-06 19:09:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-06 19:09:08,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:08,606 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:08,606 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:08,607 INFO L82 PathProgramCache]: Analyzing trace with hash -954827699, now seen corresponding path program 1 times [2019-11-06 19:09:08,607 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:08,607 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852006325] [2019-11-06 19:09:08,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:08,929 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852006325] [2019-11-06 19:09:08,929 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:08,930 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:09:08,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390487846] [2019-11-06 19:09:08,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:09:08,933 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:08,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:09:08,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:09:08,934 INFO L87 Difference]: Start difference. First operand 422 states and 673 transitions. Second operand 8 states. [2019-11-06 19:09:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:11,481 INFO L93 Difference]: Finished difference Result 1269 states and 2061 transitions. [2019-11-06 19:09:11,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:09:11,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 95 [2019-11-06 19:09:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:11,489 INFO L225 Difference]: With dead ends: 1269 [2019-11-06 19:09:11,490 INFO L226 Difference]: Without dead ends: 853 [2019-11-06 19:09:11,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:09:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2019-11-06 19:09:11,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 825. [2019-11-06 19:09:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 825 states. [2019-11-06 19:09:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1181 transitions. [2019-11-06 19:09:11,544 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1181 transitions. Word has length 95 [2019-11-06 19:09:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:11,545 INFO L462 AbstractCegarLoop]: Abstraction has 825 states and 1181 transitions. [2019-11-06 19:09:11,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:09:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1181 transitions. [2019-11-06 19:09:11,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 19:09:11,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:11,549 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:11,549 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:11,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1471750030, now seen corresponding path program 1 times [2019-11-06 19:09:11,550 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:11,550 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673961451] [2019-11-06 19:09:11,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:11,774 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673961451] [2019-11-06 19:09:11,775 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:11,775 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:09:11,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377543907] [2019-11-06 19:09:11,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:09:11,777 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:11,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:09:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:09:11,778 INFO L87 Difference]: Start difference. First operand 825 states and 1181 transitions. Second operand 9 states. [2019-11-06 19:09:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:15,076 INFO L93 Difference]: Finished difference Result 2481 states and 3694 transitions. [2019-11-06 19:09:15,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:09:15,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 98 [2019-11-06 19:09:15,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:15,088 INFO L225 Difference]: With dead ends: 2481 [2019-11-06 19:09:15,088 INFO L226 Difference]: Without dead ends: 1662 [2019-11-06 19:09:15,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:09:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-11-06 19:09:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1624. [2019-11-06 19:09:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1624 states. [2019-11-06 19:09:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2234 transitions. [2019-11-06 19:09:15,183 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2234 transitions. Word has length 98 [2019-11-06 19:09:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:15,183 INFO L462 AbstractCegarLoop]: Abstraction has 1624 states and 2234 transitions. [2019-11-06 19:09:15,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:09:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2234 transitions. [2019-11-06 19:09:15,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 19:09:15,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:15,193 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:15,193 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:15,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:15,194 INFO L82 PathProgramCache]: Analyzing trace with hash 698002821, now seen corresponding path program 1 times [2019-11-06 19:09:15,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:15,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453182229] [2019-11-06 19:09:15,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:15,483 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453182229] [2019-11-06 19:09:15,483 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326401372] [2019-11-06 19:09:15,483 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 19:09:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:15,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:09:15,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:15,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:15,700 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:15,700 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2019-11-06 19:09:15,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53803038] [2019-11-06 19:09:15,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:15,701 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:15,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:09:15,702 INFO L87 Difference]: Start difference. First operand 1624 states and 2234 transitions. Second operand 5 states. [2019-11-06 19:09:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:17,308 INFO L93 Difference]: Finished difference Result 3872 states and 5340 transitions. [2019-11-06 19:09:17,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:09:17,309 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-11-06 19:09:17,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:17,329 INFO L225 Difference]: With dead ends: 3872 [2019-11-06 19:09:17,330 INFO L226 Difference]: Without dead ends: 2254 [2019-11-06 19:09:17,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:09:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2019-11-06 19:09:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2212. [2019-11-06 19:09:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-11-06 19:09:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2893 transitions. [2019-11-06 19:09:17,419 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2893 transitions. Word has length 99 [2019-11-06 19:09:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:17,420 INFO L462 AbstractCegarLoop]: Abstraction has 2212 states and 2893 transitions. [2019-11-06 19:09:17,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2893 transitions. [2019-11-06 19:09:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 19:09:17,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:17,423 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:17,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:17,627 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1349266370, now seen corresponding path program 1 times [2019-11-06 19:09:17,628 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:17,629 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108974802] [2019-11-06 19:09:17,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:17,951 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108974802] [2019-11-06 19:09:17,952 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:17,952 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 19:09:17,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567377095] [2019-11-06 19:09:17,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:17,953 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:17,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:17,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:09:17,954 INFO L87 Difference]: Start difference. First operand 2212 states and 2893 transitions. Second operand 5 states. [2019-11-06 19:09:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:19,811 INFO L93 Difference]: Finished difference Result 5570 states and 7633 transitions. [2019-11-06 19:09:19,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 19:09:19,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-11-06 19:09:19,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:19,832 INFO L225 Difference]: With dead ends: 5570 [2019-11-06 19:09:19,832 INFO L226 Difference]: Without dead ends: 3552 [2019-11-06 19:09:19,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:09:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2019-11-06 19:09:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3358. [2019-11-06 19:09:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3358 states. [2019-11-06 19:09:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3358 states to 3358 states and 4288 transitions. [2019-11-06 19:09:19,951 INFO L78 Accepts]: Start accepts. Automaton has 3358 states and 4288 transitions. Word has length 157 [2019-11-06 19:09:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:19,952 INFO L462 AbstractCegarLoop]: Abstraction has 3358 states and 4288 transitions. [2019-11-06 19:09:19,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:19,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3358 states and 4288 transitions. [2019-11-06 19:09:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 19:09:19,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:19,957 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:19,957 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:19,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:19,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1834742215, now seen corresponding path program 1 times [2019-11-06 19:09:19,958 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:19,958 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293566188] [2019-11-06 19:09:19,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:09:20,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293566188] [2019-11-06 19:09:20,237 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231545500] [2019-11-06 19:09:20,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:20,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:09:20,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:09:20,434 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:20,435 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 19:09:20,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440998316] [2019-11-06 19:09:20,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:09:20,436 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:20,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:09:20,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:09:20,438 INFO L87 Difference]: Start difference. First operand 3358 states and 4288 transitions. Second operand 8 states. [2019-11-06 19:09:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:23,492 INFO L93 Difference]: Finished difference Result 8555 states and 11216 transitions. [2019-11-06 19:09:23,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:09:23,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 173 [2019-11-06 19:09:23,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:23,533 INFO L225 Difference]: With dead ends: 8555 [2019-11-06 19:09:23,533 INFO L226 Difference]: Without dead ends: 5391 [2019-11-06 19:09:23,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:09:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5391 states. [2019-11-06 19:09:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5391 to 4961. [2019-11-06 19:09:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4961 states. [2019-11-06 19:09:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 6426 transitions. [2019-11-06 19:09:23,738 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 6426 transitions. Word has length 173 [2019-11-06 19:09:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:23,739 INFO L462 AbstractCegarLoop]: Abstraction has 4961 states and 6426 transitions. [2019-11-06 19:09:23,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:09:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 6426 transitions. [2019-11-06 19:09:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-06 19:09:23,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:23,746 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:09:23,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:23,950 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:23,952 INFO L82 PathProgramCache]: Analyzing trace with hash 798225516, now seen corresponding path program 1 times [2019-11-06 19:09:23,952 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:23,952 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057393549] [2019-11-06 19:09:23,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 91 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:24,277 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057393549] [2019-11-06 19:09:24,277 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229664139] [2019-11-06 19:09:24,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:24,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 19:09:24,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:24,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:24,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:24,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:24,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:24,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:24,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,633 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:24,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms