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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 02:44:16,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 02:44:16,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 02:44:16,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 02:44:16,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 02:44:16,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 02:44:16,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 02:44:16,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 02:44:16,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 02:44:16,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 02:44:16,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 02:44:16,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 02:44:16,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 02:44:16,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 02:44:16,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 02:44:16,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 02:44:16,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 02:44:16,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 02:44:16,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 02:44:16,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 02:44:16,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 02:44:16,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 02:44:16,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 02:44:16,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 02:44:16,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 02:44:16,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 02:44:16,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 02:44:16,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 02:44:16,451 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 [2019-10-07 02:44:16,473 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 02:44:16,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 02:44:16,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 02:44:16,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 02:44:16,475 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 02:44:16,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 02:44:16,476 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 02:44:16,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 02:44:16,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 02:44:16,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 02:44:16,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 02:44:16,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 02:44:16,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 02:44:16,478 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 02:44:16,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 02:44:16,479 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 02:44:16,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 02:44:16,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 02:44:16,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 02:44:16,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 02:44:16,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 02:44:16,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 02:44:16,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 02:44:16,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 02:44:16,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 02:44:16,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 02:44:16,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 02:44:16,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 02:44:16,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 02:44:16,783 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 02:44:16,799 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 02:44:16,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 02:44:16,803 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 02:44:16,804 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 02:44:16,804 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2019-10-07 02:44:16,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230e46594/408124d6a12e45129837c09789bf684f/FLAGc06373ea5 [2019-10-07 02:44:17,633 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 02:44:17,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2019-10-07 02:44:17,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230e46594/408124d6a12e45129837c09789bf684f/FLAGc06373ea5 [2019-10-07 02:44:17,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230e46594/408124d6a12e45129837c09789bf684f [2019-10-07 02:44:17,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 02:44:17,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 02:44:17,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 02:44:17,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 02:44:17,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 02:44:17,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:44:17" (1/1) ... [2019-10-07 02:44:17,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f916025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:17, skipping insertion in model container [2019-10-07 02:44:17,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:44:17" (1/1) ... [2019-10-07 02:44:17,818 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 02:44:17,968 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 02:44:19,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 02:44:19,561 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 02:44:20,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 02:44:20,228 INFO L192 MainTranslator]: Completed translation [2019-10-07 02:44:20,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:20 WrapperNode [2019-10-07 02:44:20,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 02:44:20,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 02:44:20,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 02:44:20,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 02:44:20,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:20" (1/1) ... [2019-10-07 02:44:20,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:20" (1/1) ... [2019-10-07 02:44:20,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:20" (1/1) ... [2019-10-07 02:44:20,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:20" (1/1) ... [2019-10-07 02:44:20,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:20" (1/1) ... [2019-10-07 02:44:20,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:20" (1/1) ... [2019-10-07 02:44:20,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:20" (1/1) ... [2019-10-07 02:44:20,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 02:44:20,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 02:44:20,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 02:44:20,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 02:44:20,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 02:44:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 02:44:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 02:44:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 02:44:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 02:44:20,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-07 02:44:20,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-07 02:44:20,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 02:44:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 02:44:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 02:44:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-07 02:44:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-07 02:44:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 02:44:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 02:44:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 02:44:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 02:44:20,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 02:44:20,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 02:44:27,506 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 02:44:27,507 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 02:44:27,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:44:27 BoogieIcfgContainer [2019-10-07 02:44:27,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 02:44:27,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 02:44:27,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 02:44:27,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 02:44:27,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:44:17" (1/3) ... [2019-10-07 02:44:27,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f84501f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:44:27, skipping insertion in model container [2019-10-07 02:44:27,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:20" (2/3) ... [2019-10-07 02:44:27,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f84501f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:44:27, skipping insertion in model container [2019-10-07 02:44:27,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:44:27" (3/3) ... [2019-10-07 02:44:27,523 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label36.c [2019-10-07 02:44:27,533 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 02:44:27,542 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 02:44:27,554 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 02:44:27,601 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 02:44:27,601 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 02:44:27,601 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 02:44:27,602 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 02:44:27,602 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 02:44:27,603 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 02:44:27,603 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 02:44:27,603 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 02:44:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-07 02:44:27,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 02:44:27,660 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:27,662 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:44:27,664 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:27,672 INFO L82 PathProgramCache]: Analyzing trace with hash -874905522, now seen corresponding path program 1 times [2019-10-07 02:44:27,683 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:27,683 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:27,683 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:27,684 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:44:28,111 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:28,111 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:44:28,112 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 02:44:28,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 02:44:28,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 02:44:28,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 02:44:28,133 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 3 states. [2019-10-07 02:44:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:44:32,819 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2019-10-07 02:44:32,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 02:44:32,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 02:44:32,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:44:32,852 INFO L225 Difference]: With dead ends: 2068 [2019-10-07 02:44:32,852 INFO L226 Difference]: Without dead ends: 1371 [2019-10-07 02:44:32,864 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 02:44:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2019-10-07 02:44:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2019-10-07 02:44:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2019-10-07 02:44:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2477 transitions. [2019-10-07 02:44:33,002 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2477 transitions. Word has length 11 [2019-10-07 02:44:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:44:33,002 INFO L462 AbstractCegarLoop]: Abstraction has 1365 states and 2477 transitions. [2019-10-07 02:44:33,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 02:44:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2477 transitions. [2019-10-07 02:44:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-07 02:44:33,005 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:33,005 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:44:33,005 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:33,006 INFO L82 PathProgramCache]: Analyzing trace with hash -792374107, now seen corresponding path program 1 times [2019-10-07 02:44:33,006 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:33,006 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:33,007 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:33,007 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:44:33,160 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:33,160 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 02:44:33,161 INFO L95 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 [2019-10-07 02:44:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:33,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 02:44:33,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 02:44:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:44:33,415 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 02:44:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:44:33,458 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 02:44:33,458 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-07 02:44:33,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 02:44:33,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 02:44:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-07 02:44:33,463 INFO L87 Difference]: Start difference. First operand 1365 states and 2477 transitions. Second operand 3 states. [2019-10-07 02:44:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:44:38,270 INFO L93 Difference]: Finished difference Result 4081 states and 7455 transitions. [2019-10-07 02:44:38,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 02:44:38,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-10-07 02:44:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:44:38,294 INFO L225 Difference]: With dead ends: 4081 [2019-10-07 02:44:38,295 INFO L226 Difference]: Without dead ends: 2721 [2019-10-07 02:44:38,302 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-07 02:44:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2019-10-07 02:44:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2718. [2019-10-07 02:44:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2718 states. [2019-10-07 02:44:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4631 transitions. [2019-10-07 02:44:38,432 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 4631 transitions. Word has length 27 [2019-10-07 02:44:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:44:38,433 INFO L462 AbstractCegarLoop]: Abstraction has 2718 states and 4631 transitions. [2019-10-07 02:44:38,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 02:44:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 4631 transitions. [2019-10-07 02:44:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-07 02:44:38,439 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:38,439 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 02:44:38,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:44:38,645 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 846430429, now seen corresponding path program 1 times [2019-10-07 02:44:38,647 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:38,647 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:38,647 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:38,647 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:44:38,759 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:38,760 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:44:38,760 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 02:44:38,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 02:44:38,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 02:44:38,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 02:44:38,761 INFO L87 Difference]: Start difference. First operand 2718 states and 4631 transitions. Second operand 5 states. [2019-10-07 02:44:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:44:45,656 INFO L93 Difference]: Finished difference Result 8254 states and 14243 transitions. [2019-10-07 02:44:45,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 02:44:45,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-10-07 02:44:45,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:44:45,696 INFO L225 Difference]: With dead ends: 8254 [2019-10-07 02:44:45,697 INFO L226 Difference]: Without dead ends: 5541 [2019-10-07 02:44:45,704 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-07 02:44:45,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2019-10-07 02:44:45,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 5489. [2019-10-07 02:44:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5489 states. [2019-10-07 02:44:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 8544 transitions. [2019-10-07 02:44:45,888 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 8544 transitions. Word has length 31 [2019-10-07 02:44:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:44:45,889 INFO L462 AbstractCegarLoop]: Abstraction has 5489 states and 8544 transitions. [2019-10-07 02:44:45,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 02:44:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 8544 transitions. [2019-10-07 02:44:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-07 02:44:45,900 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:45,900 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 02:44:45,901 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:45,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:45,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1979349910, now seen corresponding path program 1 times [2019-10-07 02:44:45,902 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:45,902 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:45,902 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:45,902 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:44:46,065 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:46,066 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:44:46,066 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 02:44:46,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 02:44:46,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 02:44:46,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-07 02:44:46,067 INFO L87 Difference]: Start difference. First operand 5489 states and 8544 transitions. Second operand 5 states. [2019-10-07 02:44:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:44:52,849 INFO L93 Difference]: Finished difference Result 16766 states and 27181 transitions. [2019-10-07 02:44:52,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 02:44:52,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-10-07 02:44:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:44:52,915 INFO L225 Difference]: With dead ends: 16766 [2019-10-07 02:44:52,915 INFO L226 Difference]: Without dead ends: 11282 [2019-10-07 02:44:52,931 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 02:44:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11282 states. [2019-10-07 02:44:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11282 to 10967. [2019-10-07 02:44:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10967 states. [2019-10-07 02:44:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 15882 transitions. [2019-10-07 02:44:53,261 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 15882 transitions. Word has length 42 [2019-10-07 02:44:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:44:53,262 INFO L462 AbstractCegarLoop]: Abstraction has 10967 states and 15882 transitions. [2019-10-07 02:44:53,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 02:44:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 15882 transitions. [2019-10-07 02:44:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-07 02:44:53,266 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:44:53,266 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:44:53,267 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:44:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:44:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1259242681, now seen corresponding path program 1 times [2019-10-07 02:44:53,267 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:44:53,268 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:53,268 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:53,268 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:44:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:44:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:44:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:44:53,415 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:44:53,416 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:44:53,416 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 02:44:53,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 02:44:53,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 02:44:53,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 02:44:53,419 INFO L87 Difference]: Start difference. First operand 10967 states and 15882 transitions. Second operand 6 states. [2019-10-07 02:44:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:44:59,359 INFO L93 Difference]: Finished difference Result 31960 states and 49368 transitions. [2019-10-07 02:44:59,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 02:44:59,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2019-10-07 02:44:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:44:59,472 INFO L225 Difference]: With dead ends: 31960 [2019-10-07 02:44:59,472 INFO L226 Difference]: Without dead ends: 20998 [2019-10-07 02:44:59,511 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 02:44:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20998 states. [2019-10-07 02:45:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20998 to 20784. [2019-10-07 02:45:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20784 states. [2019-10-07 02:45:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20784 states to 20784 states and 30380 transitions. [2019-10-07 02:45:01,007 INFO L78 Accepts]: Start accepts. Automaton has 20784 states and 30380 transitions. Word has length 65 [2019-10-07 02:45:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:45:01,008 INFO L462 AbstractCegarLoop]: Abstraction has 20784 states and 30380 transitions. [2019-10-07 02:45:01,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 02:45:01,009 INFO L276 IsEmpty]: Start isEmpty. Operand 20784 states and 30380 transitions. [2019-10-07 02:45:01,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-07 02:45:01,012 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:45:01,012 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-07 02:45:01,012 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:45:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:45:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash -605620458, now seen corresponding path program 1 times [2019-10-07 02:45:01,013 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:45:01,013 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:01,013 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:01,014 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:45:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-07 02:45:01,195 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:01,197 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 02:45:01,197 INFO L95 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 [2019-10-07 02:45:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:01,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 02:45:01,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 02:45:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 02:45:01,432 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 02:45:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-07 02:45:01,534 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 02:45:01,566 INFO L162 IcfgInterpreter]: Started Sifa with 50 locations of interest [2019-10-07 02:45:01,566 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 02:45:01,573 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 02:45:01,582 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 02:45:01,583 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 02:45:01,796 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 59 for LOIs [2019-10-07 02:45:01,977 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 51 [2019-10-07 02:45:02,315 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 51 [2019-10-07 02:45:02,549 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-07 02:45:02,558 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-07 02:45:02,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:45:02,808 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 02:45:02,815 INFO L168 Benchmark]: Toolchain (without parser) took 45016.57 ms. Allocated memory was 136.3 MB in the beginning and 908.1 MB in the end (delta: 771.8 MB). Free memory was 87.4 MB in the beginning and 358.1 MB in the end (delta: -270.7 MB). Peak memory consumption was 501.0 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:02,817 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 136.3 MB. Free memory was 119.6 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 02:45:02,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2428.48 ms. Allocated memory was 136.3 MB in the beginning and 268.4 MB in the end (delta: 132.1 MB). Free memory was 87.0 MB in the beginning and 179.3 MB in the end (delta: -92.4 MB). Peak memory consumption was 123.5 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:02,819 INFO L168 Benchmark]: Boogie Preprocessor took 278.73 ms. Allocated memory is still 268.4 MB. Free memory was 179.3 MB in the beginning and 152.7 MB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:02,820 INFO L168 Benchmark]: RCFGBuilder took 7002.34 ms. Allocated memory was 268.4 MB in the beginning and 424.1 MB in the end (delta: 155.7 MB). Free memory was 152.7 MB in the beginning and 80.8 MB in the end (delta: 71.8 MB). Peak memory consumption was 233.9 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:02,821 INFO L168 Benchmark]: TraceAbstraction took 35299.05 ms. Allocated memory was 424.1 MB in the beginning and 908.1 MB in the end (delta: 483.9 MB). Free memory was 80.8 MB in the beginning and 358.1 MB in the end (delta: -277.3 MB). Peak memory consumption was 206.6 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:02,826 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 136.3 MB. Free memory was 119.6 MB in the beginning and 119.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2428.48 ms. Allocated memory was 136.3 MB in the beginning and 268.4 MB in the end (delta: 132.1 MB). Free memory was 87.0 MB in the beginning and 179.3 MB in the end (delta: -92.4 MB). Peak memory consumption was 123.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 278.73 ms. Allocated memory is still 268.4 MB. Free memory was 179.3 MB in the beginning and 152.7 MB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7002.34 ms. Allocated memory was 268.4 MB in the beginning and 424.1 MB in the end (delta: 155.7 MB). Free memory was 152.7 MB in the beginning and 80.8 MB in the end (delta: 71.8 MB). Peak memory consumption was 233.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 35299.05 ms. Allocated memory was 424.1 MB in the beginning and 908.1 MB in the end (delta: 483.9 MB). Free memory was 80.8 MB in the beginning and 358.1 MB in the end (delta: -277.3 MB). Peak memory consumption was 206.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...