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/Problem14_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:31,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:31,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:31,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:31,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:31,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:31,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:31,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:31,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:31,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:31,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:31,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:31,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:31,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:31,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:31,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:31,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:31,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:31,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:31,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:31,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:31,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:31,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:31,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:31,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:31,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:31,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:31,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:31,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:31,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:31,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:31,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:31,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:31,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:31,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:31,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:31,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:03:31,547 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:31,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:31,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:31,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:31,550 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:31,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:31,551 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:31,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:31,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:31,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:31,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:31,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:31,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:31,554 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:31,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:31,554 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:31,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:31,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:31,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:31,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:31,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:31,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:31,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:31,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:31,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:31,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:31,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:31,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:31,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:31,829 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:31,844 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:31,848 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:31,850 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:31,850 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:31,851 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54.c [2019-10-13 18:03:31,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e21ad9b04/1cf2baa9730a4d7ba2fadce980d4a0ca/FLAG2a1086277 [2019-10-13 18:03:32,557 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:32,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label54.c [2019-10-13 18:03:32,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e21ad9b04/1cf2baa9730a4d7ba2fadce980d4a0ca/FLAG2a1086277 [2019-10-13 18:03:32,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e21ad9b04/1cf2baa9730a4d7ba2fadce980d4a0ca [2019-10-13 18:03:32,751 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:32,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:32,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:32,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:32,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:32,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:32" (1/1) ... [2019-10-13 18:03:32,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f8ed40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:32, skipping insertion in model container [2019-10-13 18:03:32,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:32" (1/1) ... [2019-10-13 18:03:32,769 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:32,816 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:33,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:33,507 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:33,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:33,700 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:33,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33 WrapperNode [2019-10-13 18:03:33,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:33,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:33,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:33,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:33,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:33,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:33,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:33,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:33,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:33,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:33,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:33,948 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:33,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:35,357 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:35,358 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:35,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:35 BoogieIcfgContainer [2019-10-13 18:03:35,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:35,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:35,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:35,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:35,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:32" (1/3) ... [2019-10-13 18:03:35,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f64e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:35, skipping insertion in model container [2019-10-13 18:03:35,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (2/3) ... [2019-10-13 18:03:35,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f64e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:35, skipping insertion in model container [2019-10-13 18:03:35,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:35" (3/3) ... [2019-10-13 18:03:35,368 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label54.c [2019-10-13 18:03:35,378 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:35,387 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:35,399 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:35,428 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:35,428 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:35,428 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:35,428 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:35,428 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:35,428 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:35,429 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:35,429 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:03:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 18:03:35,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:35,461 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:35,463 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash 856083907, now seen corresponding path program 1 times [2019-10-13 18:03:35,477 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:35,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243823490] [2019-10-13 18:03:35,478 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:35,478 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:35,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:35,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243823490] [2019-10-13 18:03:35,757 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:35,758 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 18:03:35,758 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576912463] [2019-10-13 18:03:35,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 18:03:35,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:35,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 18:03:35,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 18:03:35,781 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-13 18:03:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:37,676 INFO L93 Difference]: Finished difference Result 714 states and 1256 transitions. [2019-10-13 18:03:37,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 18:03:37,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-13 18:03:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:37,700 INFO L225 Difference]: With dead ends: 714 [2019-10-13 18:03:37,701 INFO L226 Difference]: Without dead ends: 380 [2019-10-13 18:03:37,713 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-10-13 18:03:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 376. [2019-10-13 18:03:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-10-13 18:03:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-10-13 18:03:37,798 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 12 [2019-10-13 18:03:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:37,798 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-10-13 18:03:37,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 18:03:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-10-13 18:03:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 18:03:37,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:37,803 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:37,804 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:37,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1019209391, now seen corresponding path program 1 times [2019-10-13 18:03:37,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:37,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639073327] [2019-10-13 18:03:37,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:37,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:37,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:38,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639073327] [2019-10-13 18:03:38,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836189287] [2019-10-13 18:03:38,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:38,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:38,296 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:38,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:03:38,297 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924677161] [2019-10-13 18:03:38,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:38,299 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:38,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:38,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:38,300 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 3 states. [2019-10-13 18:03:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:39,268 INFO L93 Difference]: Finished difference Result 1114 states and 1580 transitions. [2019-10-13 18:03:39,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:39,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-10-13 18:03:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:39,277 INFO L225 Difference]: With dead ends: 1114 [2019-10-13 18:03:39,277 INFO L226 Difference]: Without dead ends: 744 [2019-10-13 18:03:39,279 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-10-13 18:03:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2019-10-13 18:03:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-13 18:03:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 975 transitions. [2019-10-13 18:03:39,343 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 975 transitions. Word has length 95 [2019-10-13 18:03:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:39,344 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 975 transitions. [2019-10-13 18:03:39,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:39,345 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 975 transitions. [2019-10-13 18:03:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 18:03:39,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:39,348 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:39,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:39,554 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:39,555 INFO L82 PathProgramCache]: Analyzing trace with hash -788431111, now seen corresponding path program 1 times [2019-10-13 18:03:39,555 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:39,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195327199] [2019-10-13 18:03:39,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:39,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:39,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:39,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195327199] [2019-10-13 18:03:39,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178085284] [2019-10-13 18:03:39,767 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 [2019-10-13 18:03:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:39,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:39,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:39,982 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:39,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-13 18:03:39,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758438554] [2019-10-13 18:03:39,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:39,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:39,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:39,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:03:39,984 INFO L87 Difference]: Start difference. First operand 744 states and 975 transitions. Second operand 5 states. [2019-10-13 18:03:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:41,299 INFO L93 Difference]: Finished difference Result 1874 states and 2429 transitions. [2019-10-13 18:03:41,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:41,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2019-10-13 18:03:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:41,306 INFO L225 Difference]: With dead ends: 1874 [2019-10-13 18:03:41,307 INFO L226 Difference]: Without dead ends: 1136 [2019-10-13 18:03:41,308 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:03:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2019-10-13 18:03:41,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1120. [2019-10-13 18:03:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2019-10-13 18:03:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1401 transitions. [2019-10-13 18:03:41,347 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1401 transitions. Word has length 107 [2019-10-13 18:03:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:41,348 INFO L462 AbstractCegarLoop]: Abstraction has 1120 states and 1401 transitions. [2019-10-13 18:03:41,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1401 transitions. [2019-10-13 18:03:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 18:03:41,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:41,352 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:41,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:41,557 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:41,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1112900547, now seen corresponding path program 1 times [2019-10-13 18:03:41,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:41,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469197092] [2019-10-13 18:03:41,559 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:41,559 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:41,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:41,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469197092] [2019-10-13 18:03:41,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028397133] [2019-10-13 18:03:41,709 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 [2019-10-13 18:03:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:41,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:41,809 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:41,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:03:41,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148667] [2019-10-13 18:03:41,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:41,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:41,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:41,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:41,811 INFO L87 Difference]: Start difference. First operand 1120 states and 1401 transitions. Second operand 3 states. [2019-10-13 18:03:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:42,689 INFO L93 Difference]: Finished difference Result 1308 states and 1718 transitions. [2019-10-13 18:03:42,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:42,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-13 18:03:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:42,696 INFO L225 Difference]: With dead ends: 1308 [2019-10-13 18:03:42,697 INFO L226 Difference]: Without dead ends: 1306 [2019-10-13 18:03:42,697 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:42,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2019-10-13 18:03:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1306. [2019-10-13 18:03:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1306 states. [2019-10-13 18:03:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1716 transitions. [2019-10-13 18:03:42,738 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1716 transitions. Word has length 121 [2019-10-13 18:03:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:42,739 INFO L462 AbstractCegarLoop]: Abstraction has 1306 states and 1716 transitions. [2019-10-13 18:03:42,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1716 transitions. [2019-10-13 18:03:42,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 18:03:42,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:42,744 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:42,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:42,953 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:42,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1321617802, now seen corresponding path program 1 times [2019-10-13 18:03:42,955 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:42,955 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624135428] [2019-10-13 18:03:42,956 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:42,956 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:42,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:03:43,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624135428] [2019-10-13 18:03:43,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946862847] [2019-10-13 18:03:43,217 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 [2019-10-13 18:03:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:43,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 18:03:43,378 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:43,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-13 18:03:43,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282205229] [2019-10-13 18:03:43,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:43,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:03:43,380 INFO L87 Difference]: Start difference. First operand 1306 states and 1716 transitions. Second operand 5 states. [2019-10-13 18:03:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:44,628 INFO L93 Difference]: Finished difference Result 3210 states and 4493 transitions. [2019-10-13 18:03:44,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:44,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 177 [2019-10-13 18:03:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:44,640 INFO L225 Difference]: With dead ends: 3210 [2019-10-13 18:03:44,641 INFO L226 Difference]: Without dead ends: 1910 [2019-10-13 18:03:44,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:44,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2019-10-13 18:03:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1874. [2019-10-13 18:03:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1874 states. [2019-10-13 18:03:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2458 transitions. [2019-10-13 18:03:44,714 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2458 transitions. Word has length 177 [2019-10-13 18:03:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:44,714 INFO L462 AbstractCegarLoop]: Abstraction has 1874 states and 2458 transitions. [2019-10-13 18:03:44,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2458 transitions. [2019-10-13 18:03:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 18:03:44,718 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:44,719 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:44,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:44,923 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:44,924 INFO L82 PathProgramCache]: Analyzing trace with hash 740914162, now seen corresponding path program 1 times [2019-10-13 18:03:44,924 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:44,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220236650] [2019-10-13 18:03:44,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:44,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:44,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:46,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220236650] [2019-10-13 18:03:46,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479899370] [2019-10-13 18:03:46,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:46,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:46,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 41 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:46,359 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:46,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2019-10-13 18:03:46,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813947250] [2019-10-13 18:03:46,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:46,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:46,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:46,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:46,361 INFO L87 Difference]: Start difference. First operand 1874 states and 2458 transitions. Second operand 16 states. [2019-10-13 18:03:48,468 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2019-10-13 18:03:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:49,945 INFO L93 Difference]: Finished difference Result 3876 states and 5103 transitions. [2019-10-13 18:03:49,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 18:03:49,945 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 191 [2019-10-13 18:03:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:49,959 INFO L225 Difference]: With dead ends: 3876 [2019-10-13 18:03:49,959 INFO L226 Difference]: Without dead ends: 1961 [2019-10-13 18:03:49,967 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2019-10-13 18:03:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2019-10-13 18:03:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1876. [2019-10-13 18:03:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2019-10-13 18:03:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2254 transitions. [2019-10-13 18:03:50,036 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2254 transitions. Word has length 191 [2019-10-13 18:03:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:50,037 INFO L462 AbstractCegarLoop]: Abstraction has 1876 states and 2254 transitions. [2019-10-13 18:03:50,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:03:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2254 transitions. [2019-10-13 18:03:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-13 18:03:50,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:50,040 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:50,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:50,253 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:50,253 INFO L82 PathProgramCache]: Analyzing trace with hash -284080629, now seen corresponding path program 1 times [2019-10-13 18:03:50,253 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:50,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489523219] [2019-10-13 18:03:50,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:50,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:50,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:03:50,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489523219] [2019-10-13 18:03:50,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235427706] [2019-10-13 18:03:50,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:50,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:03:50,590 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:50,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:03:50,591 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61100572] [2019-10-13 18:03:50,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:50,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:50,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:50,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:50,592 INFO L87 Difference]: Start difference. First operand 1876 states and 2254 transitions. Second operand 3 states. [2019-10-13 18:03:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:51,128 INFO L93 Difference]: Finished difference Result 4668 states and 5584 transitions. [2019-10-13 18:03:51,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:51,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2019-10-13 18:03:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:51,141 INFO L225 Difference]: With dead ends: 4668 [2019-10-13 18:03:51,141 INFO L226 Difference]: Without dead ends: 2614 [2019-10-13 18:03:51,147 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2019-10-13 18:03:51,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2060. [2019-10-13 18:03:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2060 states. [2019-10-13 18:03:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2436 transitions. [2019-10-13 18:03:51,207 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2436 transitions. Word has length 194 [2019-10-13 18:03:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:51,208 INFO L462 AbstractCegarLoop]: Abstraction has 2060 states and 2436 transitions. [2019-10-13 18:03:51,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2436 transitions. [2019-10-13 18:03:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-13 18:03:51,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:51,211 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:51,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:51,416 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:51,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2108772671, now seen corresponding path program 1 times [2019-10-13 18:03:51,417 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:51,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992359626] [2019-10-13 18:03:51,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:51,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:51,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:52,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992359626] [2019-10-13 18:03:52,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099952299] [2019-10-13 18:03:52,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:52,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:52,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:03:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 18:03:52,551 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:52,551 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 21 [2019-10-13 18:03:52,551 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498038739] [2019-10-13 18:03:52,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:52,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:03:52,553 INFO L87 Difference]: Start difference. First operand 2060 states and 2436 transitions. Second operand 5 states. [2019-10-13 18:03:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:53,736 INFO L93 Difference]: Finished difference Result 4326 states and 5285 transitions. [2019-10-13 18:03:53,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:53,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 216 [2019-10-13 18:03:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:53,752 INFO L225 Difference]: With dead ends: 4326 [2019-10-13 18:03:53,752 INFO L226 Difference]: Without dead ends: 2638 [2019-10-13 18:03:53,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2019-10-13 18:03:53,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2019-10-13 18:03:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2452. [2019-10-13 18:03:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2019-10-13 18:03:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 2908 transitions. [2019-10-13 18:03:53,816 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 2908 transitions. Word has length 216 [2019-10-13 18:03:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:53,816 INFO L462 AbstractCegarLoop]: Abstraction has 2452 states and 2908 transitions. [2019-10-13 18:03:53,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:53,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 2908 transitions. [2019-10-13 18:03:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-10-13 18:03:53,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:53,822 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:54,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:54,028 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:54,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:54,028 INFO L82 PathProgramCache]: Analyzing trace with hash 84824594, now seen corresponding path program 1 times [2019-10-13 18:03:54,029 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:54,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333390254] [2019-10-13 18:03:54,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:54,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:54,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 119 proven. 100 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-13 18:03:54,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333390254] [2019-10-13 18:03:54,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421937489] [2019-10-13 18:03:54,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:55,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:55,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-13 18:03:55,248 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:55,249 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-13 18:03:55,249 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305461563] [2019-10-13 18:03:55,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 18:03:55,250 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:55,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 18:03:55,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:55,251 INFO L87 Difference]: Start difference. First operand 2452 states and 2908 transitions. Second operand 13 states. [2019-10-13 18:03:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:59,423 INFO L93 Difference]: Finished difference Result 4742 states and 5734 transitions. [2019-10-13 18:03:59,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 18:03:59,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 326 [2019-10-13 18:03:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:59,434 INFO L225 Difference]: With dead ends: 4742 [2019-10-13 18:03:59,435 INFO L226 Difference]: Without dead ends: 2478 [2019-10-13 18:03:59,441 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 18:03:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2019-10-13 18:03:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2458. [2019-10-13 18:03:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2458 states. [2019-10-13 18:03:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 2826 transitions. [2019-10-13 18:03:59,494 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 2826 transitions. Word has length 326 [2019-10-13 18:03:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:59,495 INFO L462 AbstractCegarLoop]: Abstraction has 2458 states and 2826 transitions. [2019-10-13 18:03:59,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 18:03:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 2826 transitions. [2019-10-13 18:03:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2019-10-13 18:03:59,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:59,503 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:59,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:59,708 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1745249514, now seen corresponding path program 1 times [2019-10-13 18:03:59,711 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:59,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879070194] [2019-10-13 18:03:59,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:59,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:59,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-13 18:04:00,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879070194] [2019-10-13 18:04:00,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178682522] [2019-10-13 18:04:00,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:00,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:00,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:04:00,346 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:00,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:04:00,346 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611144683] [2019-10-13 18:04:00,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:04:00,347 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:04:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:04:00,348 INFO L87 Difference]: Start difference. First operand 2458 states and 2826 transitions. Second operand 3 states. [2019-10-13 18:04:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:00,976 INFO L93 Difference]: Finished difference Result 3188 states and 3662 transitions. [2019-10-13 18:04:00,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:04:00,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 404 [2019-10-13 18:04:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:00,990 INFO L225 Difference]: With dead ends: 3188 [2019-10-13 18:04:00,990 INFO L226 Difference]: Without dead ends: 3186 [2019-10-13 18:04:00,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:04:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2019-10-13 18:04:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2640. [2019-10-13 18:04:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2640 states. [2019-10-13 18:04:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 3032 transitions. [2019-10-13 18:04:01,062 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 3032 transitions. Word has length 404 [2019-10-13 18:04:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:01,064 INFO L462 AbstractCegarLoop]: Abstraction has 2640 states and 3032 transitions. [2019-10-13 18:04:01,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:04:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 3032 transitions. [2019-10-13 18:04:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2019-10-13 18:04:01,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:01,077 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:01,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:01,288 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:01,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1452112011, now seen corresponding path program 1 times [2019-10-13 18:04:01,289 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:01,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351579161] [2019-10-13 18:04:01,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:01,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:01,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 297 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-10-13 18:04:02,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351579161] [2019-10-13 18:04:02,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167527479] [2019-10-13 18:04:02,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:04:02,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:02,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:04:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-13 18:04:02,902 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:02,902 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:04:02,903 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678549732] [2019-10-13 18:04:02,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:04:02,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:02,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:04:02,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:04:02,906 INFO L87 Difference]: Start difference. First operand 2640 states and 3032 transitions. Second operand 12 states. [2019-10-13 18:04:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:05,057 INFO L93 Difference]: Finished difference Result 5171 states and 5994 transitions. [2019-10-13 18:04:05,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 18:04:05,058 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 410 [2019-10-13 18:04:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:05,065 INFO L225 Difference]: With dead ends: 5171 [2019-10-13 18:04:05,066 INFO L226 Difference]: Without dead ends: 2862 [2019-10-13 18:04:05,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 428 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:04:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2019-10-13 18:04:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2638. [2019-10-13 18:04:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2638 states. [2019-10-13 18:04:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 2927 transitions. [2019-10-13 18:04:05,122 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 2927 transitions. Word has length 410 [2019-10-13 18:04:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:05,123 INFO L462 AbstractCegarLoop]: Abstraction has 2638 states and 2927 transitions. [2019-10-13 18:04:05,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:04:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 2927 transitions. [2019-10-13 18:04:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2019-10-13 18:04:05,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:05,136 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:05,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:05,340 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1127836591, now seen corresponding path program 1 times [2019-10-13 18:04:05,341 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:05,342 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872400745] [2019-10-13 18:04:05,342 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:05,342 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:05,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 389 proven. 8 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-10-13 18:04:06,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872400745] [2019-10-13 18:04:06,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863987088] [2019-10-13 18:04:06,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:06,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:04:06,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:06,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:04:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 600 proven. 2 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-13 18:04:06,832 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:06,832 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:04:06,832 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030727671] [2019-10-13 18:04:06,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:04:06,833 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:06,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:04:06,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:04:06,834 INFO L87 Difference]: Start difference. First operand 2638 states and 2927 transitions. Second operand 17 states.