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/Problem10_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:57:16,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:57:16,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:57:16,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:57:16,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:57:16,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:57:16,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:57:16,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:57:16,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:57:16,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:57:16,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:57:16,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:57:16,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:57:16,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:57:16,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:57:16,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:57:16,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:57:16,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:57:16,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:57:16,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:57:16,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:57:16,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:57:16,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:57:16,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:57:16,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:57:16,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:57:16,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:57:16,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:57:16,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:57:16,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:57:16,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:57:16,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:57:16,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:57:16,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:57:16,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:57:16,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:57:16,483 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 [2019-10-14 21:57:16,498 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:57:16,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:57:16,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:57:16,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:57:16,506 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:57:16,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:57:16,507 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:57:16,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:57:16,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:57:16,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:57:16,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:57:16,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:57:16,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:57:16,508 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:57:16,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:57:16,508 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:57:16,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:57:16,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:57:16,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:57:16,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:57:16,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:57:16,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:57:16,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:57:16,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:57:16,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:57:16,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:57:16,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:57:16,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:57:16,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:57:16,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:57:16,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:57:16,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:57:16,797 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:57:16,798 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:57:16,798 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label29.c [2019-10-14 21:57:16,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/536b2f2d5/42f5f08b7fd04b9db3c287479170668e/FLAG6fbe65e10 [2019-10-14 21:57:17,417 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:57:17,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label29.c [2019-10-14 21:57:17,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/536b2f2d5/42f5f08b7fd04b9db3c287479170668e/FLAG6fbe65e10 [2019-10-14 21:57:17,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/536b2f2d5/42f5f08b7fd04b9db3c287479170668e [2019-10-14 21:57:17,702 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:57:17,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:57:17,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:57:17,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:57:17,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:57:17,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:57:17" (1/1) ... [2019-10-14 21:57:17,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0ba10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:17, skipping insertion in model container [2019-10-14 21:57:17,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:57:17" (1/1) ... [2019-10-14 21:57:17,721 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:57:17,762 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:57:18,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:57:18,386 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:57:18,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:57:18,495 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:57:18,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:18 WrapperNode [2019-10-14 21:57:18,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:57:18,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:57:18,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:57:18,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:57:18,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:18" (1/1) ... [2019-10-14 21:57:18,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:18" (1/1) ... [2019-10-14 21:57:18,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:18" (1/1) ... [2019-10-14 21:57:18,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:18" (1/1) ... [2019-10-14 21:57:18,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:18" (1/1) ... [2019-10-14 21:57:18,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:18" (1/1) ... [2019-10-14 21:57:18,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:18" (1/1) ... [2019-10-14 21:57:18,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:57:18,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:57:18,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:57:18,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:57:18,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:18" (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 [2019-10-14 21:57:18,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:57:18,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:57:18,706 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:57:18,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:57:18,706 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:57:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:57:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:57:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:57:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:57:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:57:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:57:19,932 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:57:19,932 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:57:19,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:57:19 BoogieIcfgContainer [2019-10-14 21:57:19,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:57:19,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:57:19,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:57:19,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:57:19,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:57:17" (1/3) ... [2019-10-14 21:57:19,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75083c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:57:19, skipping insertion in model container [2019-10-14 21:57:19,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:18" (2/3) ... [2019-10-14 21:57:19,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75083c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:57:19, skipping insertion in model container [2019-10-14 21:57:19,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:57:19" (3/3) ... [2019-10-14 21:57:19,942 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label29.c [2019-10-14 21:57:19,954 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:57:19,964 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:57:19,980 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:57:20,026 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:57:20,027 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:57:20,027 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:57:20,027 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:57:20,028 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:57:20,028 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:57:20,028 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:57:20,028 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:57:20,066 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-14 21:57:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:57:20,075 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:20,076 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:20,079 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:20,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1961965038, now seen corresponding path program 1 times [2019-10-14 21:57:20,094 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:20,095 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875752488] [2019-10-14 21:57:20,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:20,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:20,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:20,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875752488] [2019-10-14 21:57:20,512 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:20,512 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:57:20,513 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558470576] [2019-10-14 21:57:20,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:20,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:20,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:20,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:57:20,535 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-14 21:57:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:22,470 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-10-14 21:57:22,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:22,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-14 21:57:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:22,489 INFO L225 Difference]: With dead ends: 730 [2019-10-14 21:57:22,490 INFO L226 Difference]: Without dead ends: 447 [2019-10-14 21:57:22,498 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-14 21:57:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-10-14 21:57:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-14 21:57:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-10-14 21:57:22,584 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 21 [2019-10-14 21:57:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:22,584 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-10-14 21:57:22,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-10-14 21:57:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 21:57:22,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:22,590 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:57:22,590 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:22,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:22,591 INFO L82 PathProgramCache]: Analyzing trace with hash -61181822, now seen corresponding path program 1 times [2019-10-14 21:57:22,591 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:22,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501486405] [2019-10-14 21:57:22,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:22,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:22,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:22,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501486405] [2019-10-14 21:57:22,989 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:22,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:57:22,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950601244] [2019-10-14 21:57:22,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:57:22,992 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:22,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:57:22,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:57:22,993 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 8 states. [2019-10-14 21:57:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:25,334 INFO L93 Difference]: Finished difference Result 1673 states and 2829 transitions. [2019-10-14 21:57:25,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:57:25,336 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2019-10-14 21:57:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:25,350 INFO L225 Difference]: With dead ends: 1673 [2019-10-14 21:57:25,350 INFO L226 Difference]: Without dead ends: 1238 [2019-10-14 21:57:25,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:57:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2019-10-14 21:57:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 908. [2019-10-14 21:57:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2019-10-14 21:57:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1368 transitions. [2019-10-14 21:57:25,485 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1368 transitions. Word has length 103 [2019-10-14 21:57:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:25,486 INFO L462 AbstractCegarLoop]: Abstraction has 908 states and 1368 transitions. [2019-10-14 21:57:25,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:57:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1368 transitions. [2019-10-14 21:57:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 21:57:25,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:25,492 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:57:25,493 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:25,493 INFO L82 PathProgramCache]: Analyzing trace with hash 711851938, now seen corresponding path program 1 times [2019-10-14 21:57:25,493 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:25,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036799258] [2019-10-14 21:57:25,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:25,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:25,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:25,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036799258] [2019-10-14 21:57:25,794 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:25,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:57:25,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996334250] [2019-10-14 21:57:25,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:57:25,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:25,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:57:25,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:57:25,797 INFO L87 Difference]: Start difference. First operand 908 states and 1368 transitions. Second operand 9 states. [2019-10-14 21:57:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:27,620 INFO L93 Difference]: Finished difference Result 2764 states and 4664 transitions. [2019-10-14 21:57:27,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:57:27,621 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 119 [2019-10-14 21:57:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:27,636 INFO L225 Difference]: With dead ends: 2764 [2019-10-14 21:57:27,636 INFO L226 Difference]: Without dead ends: 1862 [2019-10-14 21:57:27,641 INFO L600 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 [2019-10-14 21:57:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2019-10-14 21:57:27,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1534. [2019-10-14 21:57:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1534 states. [2019-10-14 21:57:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2339 transitions. [2019-10-14 21:57:27,719 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2339 transitions. Word has length 119 [2019-10-14 21:57:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:27,720 INFO L462 AbstractCegarLoop]: Abstraction has 1534 states and 2339 transitions. [2019-10-14 21:57:27,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:57:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2339 transitions. [2019-10-14 21:57:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-14 21:57:27,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:27,727 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:57:27,728 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:27,728 INFO L82 PathProgramCache]: Analyzing trace with hash -457664942, now seen corresponding path program 1 times [2019-10-14 21:57:27,729 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:27,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379763582] [2019-10-14 21:57:27,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:27,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:27,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:28,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379763582] [2019-10-14 21:57:28,050 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:28,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:57:28,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927894444] [2019-10-14 21:57:28,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:57:28,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:28,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:57:28,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:57:28,053 INFO L87 Difference]: Start difference. First operand 1534 states and 2339 transitions. Second operand 9 states. [2019-10-14 21:57:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:29,559 INFO L93 Difference]: Finished difference Result 3853 states and 6206 transitions. [2019-10-14 21:57:29,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:57:29,560 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 143 [2019-10-14 21:57:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:29,580 INFO L225 Difference]: With dead ends: 3853 [2019-10-14 21:57:29,580 INFO L226 Difference]: Without dead ends: 2325 [2019-10-14 21:57:29,588 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:57:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2019-10-14 21:57:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2124. [2019-10-14 21:57:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2124 states. [2019-10-14 21:57:29,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 2907 transitions. [2019-10-14 21:57:29,678 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 2907 transitions. Word has length 143 [2019-10-14 21:57:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:29,679 INFO L462 AbstractCegarLoop]: Abstraction has 2124 states and 2907 transitions. [2019-10-14 21:57:29,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:57:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 2907 transitions. [2019-10-14 21:57:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 21:57:29,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:29,683 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:29,683 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:29,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1615029563, now seen corresponding path program 1 times [2019-10-14 21:57:29,684 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:29,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740318374] [2019-10-14 21:57:29,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:29,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:29,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:29,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740318374] [2019-10-14 21:57:29,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545322499] [2019-10-14 21:57:29,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:30,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:30,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:30,176 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:30,176 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:57:30,176 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716960216] [2019-10-14 21:57:30,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:57:30,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:30,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:57:30,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:57:30,178 INFO L87 Difference]: Start difference. First operand 2124 states and 2907 transitions. Second operand 12 states. [2019-10-14 21:57:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:34,175 INFO L93 Difference]: Finished difference Result 5883 states and 8396 transitions. [2019-10-14 21:57:34,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:57:34,176 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 182 [2019-10-14 21:57:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:34,197 INFO L225 Difference]: With dead ends: 5883 [2019-10-14 21:57:34,197 INFO L226 Difference]: Without dead ends: 3620 [2019-10-14 21:57:34,206 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:57:34,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2019-10-14 21:57:34,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 2863. [2019-10-14 21:57:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2863 states. [2019-10-14 21:57:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 3740 transitions. [2019-10-14 21:57:34,360 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 3740 transitions. Word has length 182 [2019-10-14 21:57:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:34,360 INFO L462 AbstractCegarLoop]: Abstraction has 2863 states and 3740 transitions. [2019-10-14 21:57:34,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:57:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 3740 transitions. [2019-10-14 21:57:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-14 21:57:34,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:34,372 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:34,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:34,578 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:34,578 INFO L82 PathProgramCache]: Analyzing trace with hash 799619137, now seen corresponding path program 1 times [2019-10-14 21:57:34,579 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:34,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237079023] [2019-10-14 21:57:34,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:34,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:34,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:57:34,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237079023] [2019-10-14 21:57:34,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737561051] [2019-10-14 21:57:34,836 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 [2019-10-14 21:57:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:34,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:57:34,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:57:35,036 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:35,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2019-10-14 21:57:35,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146072095] [2019-10-14 21:57:35,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:35,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:35,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:35,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:57:35,038 INFO L87 Difference]: Start difference. First operand 2863 states and 3740 transitions. Second operand 5 states. [2019-10-14 21:57:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:35,952 INFO L93 Difference]: Finished difference Result 5881 states and 7688 transitions. [2019-10-14 21:57:35,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:35,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2019-10-14 21:57:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:35,968 INFO L225 Difference]: With dead ends: 5881 [2019-10-14 21:57:35,968 INFO L226 Difference]: Without dead ends: 3024 [2019-10-14 21:57:35,978 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:57:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2019-10-14 21:57:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2873. [2019-10-14 21:57:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2873 states. [2019-10-14 21:57:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 3762 transitions. [2019-10-14 21:57:36,071 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 3762 transitions. Word has length 196 [2019-10-14 21:57:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:36,071 INFO L462 AbstractCegarLoop]: Abstraction has 2873 states and 3762 transitions. [2019-10-14 21:57:36,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 3762 transitions. [2019-10-14 21:57:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2019-10-14 21:57:36,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:36,080 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:36,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:36,283 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1679886725, now seen corresponding path program 1 times [2019-10-14 21:57:36,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:36,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429321055] [2019-10-14 21:57:36,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:36,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:36,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 51 proven. 201 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:57:36,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429321055] [2019-10-14 21:57:36,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755043612] [2019-10-14 21:57:36,863 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 [2019-10-14 21:57:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:36,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:36,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:37,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 242 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:57:37,065 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:37,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-10-14 21:57:37,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145193343] [2019-10-14 21:57:37,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:57:37,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:37,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:57:37,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:57:37,068 INFO L87 Difference]: Start difference. First operand 2873 states and 3762 transitions. Second operand 15 states. [2019-10-14 21:57:42,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:42,128 INFO L93 Difference]: Finished difference Result 5834 states and 8064 transitions. [2019-10-14 21:57:42,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-14 21:57:42,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 266 [2019-10-14 21:57:42,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:42,145 INFO L225 Difference]: With dead ends: 5834 [2019-10-14 21:57:42,145 INFO L226 Difference]: Without dead ends: 3110 [2019-10-14 21:57:42,157 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2019-10-14 21:57:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2019-10-14 21:57:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 3028. [2019-10-14 21:57:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3028 states. [2019-10-14 21:57:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 3712 transitions. [2019-10-14 21:57:42,255 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 3712 transitions. Word has length 266 [2019-10-14 21:57:42,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:42,256 INFO L462 AbstractCegarLoop]: Abstraction has 3028 states and 3712 transitions. [2019-10-14 21:57:42,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:57:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 3712 transitions. [2019-10-14 21:57:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2019-10-14 21:57:42,265 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:42,265 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:42,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:42,469 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:42,470 INFO L82 PathProgramCache]: Analyzing trace with hash -105495466, now seen corresponding path program 1 times [2019-10-14 21:57:42,471 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:42,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837434427] [2019-10-14 21:57:42,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:42,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:42,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 49 proven. 238 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:57:43,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837434427] [2019-10-14 21:57:43,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786144886] [2019-10-14 21:57:43,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:43,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:57:43,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:43,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:43,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:43,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:43,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:43,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:43,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:43,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:43,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:55,423 WARN L191 SmtUtils]: Spent 11.87 s on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-10-14 21:57:55,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:57:55,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms