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/Problem03_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:12,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:12,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:12,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:12,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:12,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:12,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:12,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:12,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:12,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:12,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:12,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:12,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:12,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:12,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:12,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:12,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:12,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:12,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:12,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:12,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:12,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:12,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:12,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:12,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:12,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:12,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:12,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:12,495 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 21:54:12,520 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:12,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:12,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:12,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:12,523 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:12,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:12,524 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:12,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:12,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:12,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:12,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:12,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:12,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:12,527 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:12,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:12,527 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:12,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:12,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:12,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:12,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:12,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:12,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:12,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:12,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:12,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:12,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:12,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:12,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:12,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:12,838 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:12,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:12,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:12,861 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:12,862 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:12,863 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label06.c [2019-10-14 21:54:12,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54b529ec6/dae5eef5e9d04e47b2447ced9d324378/FLAG7775a17e2 [2019-10-14 21:54:13,641 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:13,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label06.c [2019-10-14 21:54:13,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54b529ec6/dae5eef5e9d04e47b2447ced9d324378/FLAG7775a17e2 [2019-10-14 21:54:13,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54b529ec6/dae5eef5e9d04e47b2447ced9d324378 [2019-10-14 21:54:13,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:13,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:13,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:13,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:13,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:13,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:13" (1/1) ... [2019-10-14 21:54:13,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39aa9343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:13, skipping insertion in model container [2019-10-14 21:54:13,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:13" (1/1) ... [2019-10-14 21:54:13,869 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:13,961 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:14,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:14,915 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:15,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:15,193 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:15,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:15 WrapperNode [2019-10-14 21:54:15,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:15,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:15,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:15,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:15,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:15" (1/1) ... [2019-10-14 21:54:15,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:15" (1/1) ... [2019-10-14 21:54:15,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:15" (1/1) ... [2019-10-14 21:54:15,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:15" (1/1) ... [2019-10-14 21:54:15,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:15" (1/1) ... [2019-10-14 21:54:15,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:15" (1/1) ... [2019-10-14 21:54:15,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:15" (1/1) ... [2019-10-14 21:54:15,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:15,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:15,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:15,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:15,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:15" (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 21:54:15,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:15,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:15,441 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:15,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:17,407 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:17,408 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:17,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:17 BoogieIcfgContainer [2019-10-14 21:54:17,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:17,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:17,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:17,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:17,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:13" (1/3) ... [2019-10-14 21:54:17,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6627979f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:17, skipping insertion in model container [2019-10-14 21:54:17,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:15" (2/3) ... [2019-10-14 21:54:17,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6627979f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:17, skipping insertion in model container [2019-10-14 21:54:17,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:17" (3/3) ... [2019-10-14 21:54:17,438 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label06.c [2019-10-14 21:54:17,452 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:17,466 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:17,483 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:17,535 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:17,536 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:17,538 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:17,538 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:17,538 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:17,539 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:17,539 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:17,539 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:17,581 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-14 21:54:17,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:17,605 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:17,608 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1888144736, now seen corresponding path program 1 times [2019-10-14 21:54:17,625 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:17,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608263220] [2019-10-14 21:54:17,626 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:17,626 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:17,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:18,631 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:18,769 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 21:54:18,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608263220] [2019-10-14 21:54:18,770 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:18,771 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:18,771 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884868388] [2019-10-14 21:54:18,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:18,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:18,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:18,796 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:19,034 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:19,625 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:23,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:23,482 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2019-10-14 21:54:23,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:23,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2019-10-14 21:54:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:23,506 INFO L225 Difference]: With dead ends: 1107 [2019-10-14 21:54:23,506 INFO L226 Difference]: Without dead ends: 699 [2019-10-14 21:54:23,515 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-10-14 21:54:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2019-10-14 21:54:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2019-10-14 21:54:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2019-10-14 21:54:23,618 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 175 [2019-10-14 21:54:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:23,620 INFO L462 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2019-10-14 21:54:23,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2019-10-14 21:54:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-14 21:54:23,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:23,636 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:23,636 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1588270708, now seen corresponding path program 1 times [2019-10-14 21:54:23,637 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:23,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995540830] [2019-10-14 21:54:23,637 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:23,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:23,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:24,017 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:24,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995540830] [2019-10-14 21:54:24,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733819666] [2019-10-14 21:54:24,181 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 21:54:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:24,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:54:24,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:24,458 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:24,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2019-10-14 21:54:24,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942123190] [2019-10-14 21:54:24,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:24,461 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:24,462 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand 5 states. [2019-10-14 21:54:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:26,056 INFO L93 Difference]: Finished difference Result 1418 states and 2188 transitions. [2019-10-14 21:54:26,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:26,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-10-14 21:54:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:26,068 INFO L225 Difference]: With dead ends: 1418 [2019-10-14 21:54:26,068 INFO L226 Difference]: Without dead ends: 950 [2019-10-14 21:54:26,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:54:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2019-10-14 21:54:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 934. [2019-10-14 21:54:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-14 21:54:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1406 transitions. [2019-10-14 21:54:26,149 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1406 transitions. Word has length 187 [2019-10-14 21:54:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:26,151 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1406 transitions. [2019-10-14 21:54:26,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1406 transitions. [2019-10-14 21:54:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-14 21:54:26,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:26,161 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:26,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:26,375 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash -73894969, now seen corresponding path program 1 times [2019-10-14 21:54:26,376 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:26,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49228539] [2019-10-14 21:54:26,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:26,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:26,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:26,704 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:27,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49228539] [2019-10-14 21:54:27,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:27,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:54:27,081 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243957015] [2019-10-14 21:54:27,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:54:27,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:27,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:54:27,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:27,083 INFO L87 Difference]: Start difference. First operand 934 states and 1406 transitions. Second operand 9 states. [2019-10-14 21:54:27,269 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:28,100 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:30,779 INFO L93 Difference]: Finished difference Result 2788 states and 4384 transitions. [2019-10-14 21:54:30,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:54:30,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 202 [2019-10-14 21:54:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:30,800 INFO L225 Difference]: With dead ends: 2788 [2019-10-14 21:54:30,800 INFO L226 Difference]: Without dead ends: 1860 [2019-10-14 21:54:30,805 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:54:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2019-10-14 21:54:30,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1826. [2019-10-14 21:54:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1826 states. [2019-10-14 21:54:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 2555 transitions. [2019-10-14 21:54:30,924 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 2555 transitions. Word has length 202 [2019-10-14 21:54:30,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:30,924 INFO L462 AbstractCegarLoop]: Abstraction has 1826 states and 2555 transitions. [2019-10-14 21:54:30,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:54:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 2555 transitions. [2019-10-14 21:54:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-10-14 21:54:30,934 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:30,935 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:30,935 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:30,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1603258002, now seen corresponding path program 1 times [2019-10-14 21:54:30,936 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:30,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098964220] [2019-10-14 21:54:30,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:30,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:30,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:31,159 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:31,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098964220] [2019-10-14 21:54:31,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119188543] [2019-10-14 21:54:31,488 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 21:54:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:31,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:54:31,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:54:31,794 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:54:31,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:54:31,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119420688] [2019-10-14 21:54:31,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:54:31,795 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:31,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:54:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:31,796 INFO L87 Difference]: Start difference. First operand 1826 states and 2555 transitions. Second operand 11 states. [2019-10-14 21:54:31,937 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:32,434 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:32,652 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:36,835 INFO L93 Difference]: Finished difference Result 7244 states and 10859 transitions. [2019-10-14 21:54:36,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:54:36,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 220 [2019-10-14 21:54:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:36,876 INFO L225 Difference]: With dead ends: 7244 [2019-10-14 21:54:36,876 INFO L226 Difference]: Without dead ends: 5424 [2019-10-14 21:54:36,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:54:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5424 states. [2019-10-14 21:54:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5424 to 5348. [2019-10-14 21:54:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5348 states. [2019-10-14 21:54:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 7374 transitions. [2019-10-14 21:54:37,084 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 7374 transitions. Word has length 220 [2019-10-14 21:54:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:37,086 INFO L462 AbstractCegarLoop]: Abstraction has 5348 states and 7374 transitions. [2019-10-14 21:54:37,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:54:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 7374 transitions. [2019-10-14 21:54:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-10-14 21:54:37,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:37,102 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:37,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:37,311 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:37,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1338597659, now seen corresponding path program 1 times [2019-10-14 21:54:37,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:37,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573265096] [2019-10-14 21:54:37,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:37,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:37,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,559 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:37,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573265096] [2019-10-14 21:54:37,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378743884] [2019-10-14 21:54:37,837 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 21:54:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:38,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:38,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:54:38,190 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:38,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:54:38,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810434390] [2019-10-14 21:54:38,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:38,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:38,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:38,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:38,192 INFO L87 Difference]: Start difference. First operand 5348 states and 7374 transitions. Second operand 3 states. [2019-10-14 21:54:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:39,240 INFO L93 Difference]: Finished difference Result 10696 states and 14778 transitions. [2019-10-14 21:54:39,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:39,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2019-10-14 21:54:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:39,272 INFO L225 Difference]: With dead ends: 10696 [2019-10-14 21:54:39,272 INFO L226 Difference]: Without dead ends: 5354 [2019-10-14 21:54:39,287 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5354 states. [2019-10-14 21:54:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5354 to 5344. [2019-10-14 21:54:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2019-10-14 21:54:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 7091 transitions. [2019-10-14 21:54:39,431 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 7091 transitions. Word has length 220 [2019-10-14 21:54:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:39,434 INFO L462 AbstractCegarLoop]: Abstraction has 5344 states and 7091 transitions. [2019-10-14 21:54:39,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 7091 transitions. [2019-10-14 21:54:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-10-14 21:54:39,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:39,449 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:39,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:39,655 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash -164266544, now seen corresponding path program 1 times [2019-10-14 21:54:39,655 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:39,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181931747] [2019-10-14 21:54:39,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:39,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:39,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,995 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:54:40,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181931747] [2019-10-14 21:54:40,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621720407] [2019-10-14 21:54:40,169 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 21:54:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:54:40,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:54:40,508 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:40,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:54:40,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641833030] [2019-10-14 21:54:40,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:40,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:40,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:40,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:40,512 INFO L87 Difference]: Start difference. First operand 5344 states and 7091 transitions. Second operand 3 states. [2019-10-14 21:54:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:41,641 INFO L93 Difference]: Finished difference Result 15194 states and 20552 transitions. [2019-10-14 21:54:41,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:41,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2019-10-14 21:54:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:41,688 INFO L225 Difference]: With dead ends: 15194 [2019-10-14 21:54:41,688 INFO L226 Difference]: Without dead ends: 9856 [2019-10-14 21:54:41,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9856 states. [2019-10-14 21:54:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9856 to 9837. [2019-10-14 21:54:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9837 states. [2019-10-14 21:54:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9837 states to 9837 states and 12946 transitions. [2019-10-14 21:54:41,965 INFO L78 Accepts]: Start accepts. Automaton has 9837 states and 12946 transitions. Word has length 221 [2019-10-14 21:54:41,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:41,965 INFO L462 AbstractCegarLoop]: Abstraction has 9837 states and 12946 transitions. [2019-10-14 21:54:41,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 9837 states and 12946 transitions. [2019-10-14 21:54:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-10-14 21:54:41,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:41,996 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:42,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:42,207 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:42,208 INFO L82 PathProgramCache]: Analyzing trace with hash 212522786, now seen corresponding path program 1 times [2019-10-14 21:54:42,208 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:42,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326228612] [2019-10-14 21:54:42,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:42,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:42,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,423 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:54:42,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326228612] [2019-10-14 21:54:42,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834770617] [2019-10-14 21:54:42,716 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 [2019-10-14 21:54:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:42,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:54:43,010 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:54:43,010 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:54:43,010 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237889237] [2019-10-14 21:54:43,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:54:43,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:43,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:54:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:43,012 INFO L87 Difference]: Start difference. First operand 9837 states and 12946 transitions. Second operand 11 states. [2019-10-14 21:54:43,170 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:43,529 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 21:54:45,680 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:47,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:47,661 INFO L93 Difference]: Finished difference Result 19553 states and 27391 transitions. [2019-10-14 21:54:47,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:54:47,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 247 [2019-10-14 21:54:47,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:47,707 INFO L225 Difference]: With dead ends: 19553 [2019-10-14 21:54:47,707 INFO L226 Difference]: Without dead ends: 9722 [2019-10-14 21:54:47,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:54:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9722 states. [2019-10-14 21:54:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9722 to 9491. [2019-10-14 21:54:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9491 states. [2019-10-14 21:54:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9491 states to 9491 states and 12126 transitions. [2019-10-14 21:54:47,985 INFO L78 Accepts]: Start accepts. Automaton has 9491 states and 12126 transitions. Word has length 247 [2019-10-14 21:54:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:47,986 INFO L462 AbstractCegarLoop]: Abstraction has 9491 states and 12126 transitions. [2019-10-14 21:54:47,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:54:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 9491 states and 12126 transitions. [2019-10-14 21:54:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-10-14 21:54:48,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:48,018 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:48,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:48,224 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -165293655, now seen corresponding path program 1 times [2019-10-14 21:54:48,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:48,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271978362] [2019-10-14 21:54:48,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:48,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:48,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:48,491 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:48,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271978362] [2019-10-14 21:54:48,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034816436] [2019-10-14 21:54:48,777 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 [2019-10-14 21:54:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:48,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:54:48,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:49,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms