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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:01,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:01,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:01,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:01,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:01,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:01,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:01,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:01,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:01,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:01,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:01,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:01,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:01,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:01,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:01,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:01,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:01,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:01,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:01,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:01,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:01,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:01,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:01,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:01,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:01,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:01,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:01,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:01,287 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 22:02:01,305 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:01,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:01,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:01,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:01,307 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:01,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:01,307 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:01,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:01,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:01,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:01,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:01,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:01,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:01,309 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:01,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:01,309 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:01,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:01,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:01,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:01,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:01,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:01,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:01,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:01,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:01,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:01,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:01,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:01,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:01,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:01,583 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:01,595 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:01,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:01,602 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:01,602 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:01,603 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-10-14 22:02:01,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68855bea/67085cbd3f5c4e22b3e43989961564f1/FLAG5e695af6f [2019-10-14 22:02:02,289 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:02,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-10-14 22:02:02,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68855bea/67085cbd3f5c4e22b3e43989961564f1/FLAG5e695af6f [2019-10-14 22:02:02,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68855bea/67085cbd3f5c4e22b3e43989961564f1 [2019-10-14 22:02:02,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:02,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:02,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:02,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:02,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:02,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:02" (1/1) ... [2019-10-14 22:02:02,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2e6592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:02, skipping insertion in model container [2019-10-14 22:02:02,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:02" (1/1) ... [2019-10-14 22:02:02,572 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:02,631 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:03,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:03,235 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:03,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:03,477 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:03,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:03 WrapperNode [2019-10-14 22:02:03,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:03,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:03,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:03,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:03,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:03" (1/1) ... [2019-10-14 22:02:03,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:03" (1/1) ... [2019-10-14 22:02:03,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:03" (1/1) ... [2019-10-14 22:02:03,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:03" (1/1) ... [2019-10-14 22:02:03,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:03" (1/1) ... [2019-10-14 22:02:03,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:03" (1/1) ... [2019-10-14 22:02:03,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:03" (1/1) ... [2019-10-14 22:02:03,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:03,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:03,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:03,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:03,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:03,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:03,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:03,689 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:03,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:03,689 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:03,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:03,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:03,690 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:03,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:03,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:03,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:05,022 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:05,026 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:05,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:05 BoogieIcfgContainer [2019-10-14 22:02:05,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:05,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:05,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:05,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:05,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:02" (1/3) ... [2019-10-14 22:02:05,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da9ec30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:05, skipping insertion in model container [2019-10-14 22:02:05,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:03" (2/3) ... [2019-10-14 22:02:05,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da9ec30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:05, skipping insertion in model container [2019-10-14 22:02:05,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:05" (3/3) ... [2019-10-14 22:02:05,048 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label37.c [2019-10-14 22:02:05,064 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:05,078 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:05,093 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:05,134 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:05,134 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:05,135 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:05,135 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:05,135 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:05,135 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:05,135 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:05,136 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:05,174 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:02:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 22:02:05,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:05,185 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] [2019-10-14 22:02:05,187 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:05,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:05,196 INFO L82 PathProgramCache]: Analyzing trace with hash -803708109, now seen corresponding path program 1 times [2019-10-14 22:02:05,206 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:05,206 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156379853] [2019-10-14 22:02:05,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:05,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:05,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:05,666 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 22:02:05,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156379853] [2019-10-14 22:02:05,670 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:05,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:05,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096968949] [2019-10-14 22:02:05,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:05,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:05,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:05,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:05,696 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:02:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:08,193 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-14 22:02:08,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:08,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-14 22:02:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:08,220 INFO L225 Difference]: With dead ends: 886 [2019-10-14 22:02:08,221 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:02:08,231 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:02:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-14 22:02:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-14 22:02:08,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-14 22:02:08,346 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 24 [2019-10-14 22:02:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:08,346 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-14 22:02:08,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-14 22:02:08,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 22:02:08,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:08,352 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:02:08,353 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:08,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:08,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1307539406, now seen corresponding path program 1 times [2019-10-14 22:02:08,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:08,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841891228] [2019-10-14 22:02:08,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:08,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:08,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:08,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841891228] [2019-10-14 22:02:08,786 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:08,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:02:08,787 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630593844] [2019-10-14 22:02:08,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:02:08,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:08,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:02:08,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:08,790 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-14 22:02:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:10,776 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-14 22:02:10,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:02:10,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 98 [2019-10-14 22:02:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:10,790 INFO L225 Difference]: With dead ends: 1320 [2019-10-14 22:02:10,791 INFO L226 Difference]: Without dead ends: 768 [2019-10-14 22:02:10,793 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:02:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-14 22:02:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-14 22:02:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-14 22:02:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-14 22:02:10,827 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 98 [2019-10-14 22:02:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:10,828 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-14 22:02:10,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:02:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-14 22:02:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 22:02:10,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:10,832 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:02:10,833 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:10,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1750148479, now seen corresponding path program 1 times [2019-10-14 22:02:10,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:10,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774002905] [2019-10-14 22:02:10,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:10,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:10,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:11,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774002905] [2019-10-14 22:02:11,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775372226] [2019-10-14 22:02:11,073 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 22:02:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:11,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:11,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:11,239 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:11,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:11,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251791053] [2019-10-14 22:02:11,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:11,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:11,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:11,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:11,254 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-14 22:02:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:12,350 INFO L93 Difference]: Finished difference Result 1676 states and 2459 transitions. [2019-10-14 22:02:12,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:12,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-10-14 22:02:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:12,363 INFO L225 Difference]: With dead ends: 1676 [2019-10-14 22:02:12,364 INFO L226 Difference]: Without dead ends: 1116 [2019-10-14 22:02:12,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-10-14 22:02:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 932. [2019-10-14 22:02:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2019-10-14 22:02:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1275 transitions. [2019-10-14 22:02:12,400 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1275 transitions. Word has length 107 [2019-10-14 22:02:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:12,401 INFO L462 AbstractCegarLoop]: Abstraction has 932 states and 1275 transitions. [2019-10-14 22:02:12,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1275 transitions. [2019-10-14 22:02:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-14 22:02:12,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:12,406 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:12,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:12,611 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:12,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1588575235, now seen corresponding path program 1 times [2019-10-14 22:02:12,612 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:12,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510591558] [2019-10-14 22:02:12,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:12,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:12,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 22:02:12,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510591558] [2019-10-14 22:02:12,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972125251] [2019-10-14 22:02:12,876 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 22:02:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:13,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:13,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 22:02:13,109 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:13,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:13,110 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396089395] [2019-10-14 22:02:13,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:13,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:13,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:13,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:13,115 INFO L87 Difference]: Start difference. First operand 932 states and 1275 transitions. Second operand 3 states. [2019-10-14 22:02:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:13,999 INFO L93 Difference]: Finished difference Result 2412 states and 3390 transitions. [2019-10-14 22:02:14,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:14,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2019-10-14 22:02:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:14,012 INFO L225 Difference]: With dead ends: 2412 [2019-10-14 22:02:14,012 INFO L226 Difference]: Without dead ends: 1486 [2019-10-14 22:02:14,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-10-14 22:02:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1302. [2019-10-14 22:02:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-10-14 22:02:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1746 transitions. [2019-10-14 22:02:14,065 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1746 transitions. Word has length 210 [2019-10-14 22:02:14,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:14,067 INFO L462 AbstractCegarLoop]: Abstraction has 1302 states and 1746 transitions. [2019-10-14 22:02:14,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1746 transitions. [2019-10-14 22:02:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-14 22:02:14,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:14,079 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:14,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:14,291 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:14,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1682277713, now seen corresponding path program 1 times [2019-10-14 22:02:14,292 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:14,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176385191] [2019-10-14 22:02:14,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:14,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:14,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:02:14,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176385191] [2019-10-14 22:02:14,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886116672] [2019-10-14 22:02:14,544 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 22:02:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:14,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:02:14,699 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:14,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-14 22:02:14,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055879225] [2019-10-14 22:02:14,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:14,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:14,701 INFO L87 Difference]: Start difference. First operand 1302 states and 1746 transitions. Second operand 3 states. [2019-10-14 22:02:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:15,546 INFO L93 Difference]: Finished difference Result 3702 states and 5056 transitions. [2019-10-14 22:02:15,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:15,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2019-10-14 22:02:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:15,565 INFO L225 Difference]: With dead ends: 3702 [2019-10-14 22:02:15,565 INFO L226 Difference]: Without dead ends: 2406 [2019-10-14 22:02:15,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2019-10-14 22:02:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2224. [2019-10-14 22:02:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2224 states. [2019-10-14 22:02:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 2933 transitions. [2019-10-14 22:02:15,642 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 2933 transitions. Word has length 216 [2019-10-14 22:02:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:15,643 INFO L462 AbstractCegarLoop]: Abstraction has 2224 states and 2933 transitions. [2019-10-14 22:02:15,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 2933 transitions. [2019-10-14 22:02:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-14 22:02:15,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:15,648 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:15,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:15,853 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1807502101, now seen corresponding path program 1 times [2019-10-14 22:02:15,854 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:15,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052478226] [2019-10-14 22:02:15,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:15,855 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:15,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 22:02:16,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052478226] [2019-10-14 22:02:16,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421284773] [2019-10-14 22:02:16,080 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 22:02:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:16,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 22:02:16,317 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:16,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 22:02:16,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930608097] [2019-10-14 22:02:16,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:16,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:16,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:16,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:16,320 INFO L87 Difference]: Start difference. First operand 2224 states and 2933 transitions. Second operand 3 states. [2019-10-14 22:02:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:17,353 INFO L93 Difference]: Finished difference Result 5180 states and 6986 transitions. [2019-10-14 22:02:17,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:17,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2019-10-14 22:02:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:17,376 INFO L225 Difference]: With dead ends: 5180 [2019-10-14 22:02:17,376 INFO L226 Difference]: Without dead ends: 2962 [2019-10-14 22:02:17,385 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2019-10-14 22:02:17,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2780. [2019-10-14 22:02:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2780 states. [2019-10-14 22:02:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 3722 transitions. [2019-10-14 22:02:17,514 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 3722 transitions. Word has length 230 [2019-10-14 22:02:17,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:17,515 INFO L462 AbstractCegarLoop]: Abstraction has 2780 states and 3722 transitions. [2019-10-14 22:02:17,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 3722 transitions. [2019-10-14 22:02:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-10-14 22:02:17,529 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:17,530 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:17,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:17,735 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash 710456757, now seen corresponding path program 1 times [2019-10-14 22:02:17,736 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:17,736 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563482460] [2019-10-14 22:02:17,736 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:17,737 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:17,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:18,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563482460] [2019-10-14 22:02:18,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320949044] [2019-10-14 22:02:18,759 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 22:02:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:18,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:19,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 22:02:19,227 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:19,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2019-10-14 22:02:19,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120053829] [2019-10-14 22:02:19,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:19,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:19,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:02:19,229 INFO L87 Difference]: Start difference. First operand 2780 states and 3722 transitions. Second operand 5 states. [2019-10-14 22:02:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:20,647 INFO L93 Difference]: Finished difference Result 6146 states and 8216 transitions. [2019-10-14 22:02:20,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:20,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2019-10-14 22:02:20,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:20,669 INFO L225 Difference]: With dead ends: 6146 [2019-10-14 22:02:20,669 INFO L226 Difference]: Without dead ends: 3372 [2019-10-14 22:02:20,677 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:02:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2019-10-14 22:02:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3184. [2019-10-14 22:02:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2019-10-14 22:02:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4185 transitions. [2019-10-14 22:02:20,769 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4185 transitions. Word has length 278 [2019-10-14 22:02:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:20,770 INFO L462 AbstractCegarLoop]: Abstraction has 3184 states and 4185 transitions. [2019-10-14 22:02:20,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4185 transitions. [2019-10-14 22:02:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2019-10-14 22:02:20,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:20,781 INFO L380 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:20,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:20,984 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash -987748772, now seen corresponding path program 1 times [2019-10-14 22:02:20,985 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:20,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382274751] [2019-10-14 22:02:20,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:20,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:20,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 61 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:22,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382274751] [2019-10-14 22:02:22,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856039621] [2019-10-14 22:02:22,170 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 22:02:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:22,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:22,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:22,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 260 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 22:02:22,593 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:22,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:02:22,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685147975] [2019-10-14 22:02:22,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:22,595 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:22,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:22,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:22,595 INFO L87 Difference]: Start difference. First operand 3184 states and 4185 transitions. Second operand 16 states. [2019-10-14 22:02:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:26,664 INFO L93 Difference]: Finished difference Result 6682 states and 8813 transitions. [2019-10-14 22:02:26,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 22:02:26,665 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 362 [2019-10-14 22:02:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:26,682 INFO L225 Difference]: With dead ends: 6682 [2019-10-14 22:02:26,682 INFO L226 Difference]: Without dead ends: 3457 [2019-10-14 22:02:26,691 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:02:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2019-10-14 22:02:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 3382. [2019-10-14 22:02:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3382 states. [2019-10-14 22:02:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 4139 transitions. [2019-10-14 22:02:26,781 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 4139 transitions. Word has length 362 [2019-10-14 22:02:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:26,781 INFO L462 AbstractCegarLoop]: Abstraction has 3382 states and 4139 transitions. [2019-10-14 22:02:26,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:02:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 4139 transitions. [2019-10-14 22:02:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2019-10-14 22:02:26,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:26,792 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:26,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:26,996 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:26,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1145133969, now seen corresponding path program 1 times [2019-10-14 22:02:26,998 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:26,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501432784] [2019-10-14 22:02:26,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:26,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:26,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 122 proven. 252 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:27,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501432784] [2019-10-14 22:02:27,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584395871] [2019-10-14 22:02:27,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 22:02:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:27,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:27,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:02:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-14 22:02:28,115 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:28,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-10-14 22:02:28,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003630937] [2019-10-14 22:02:28,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:28,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:02:28,118 INFO L87 Difference]: Start difference. First operand 3382 states and 4139 transitions. Second operand 5 states. [2019-10-14 22:02:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:29,190 INFO L93 Difference]: Finished difference Result 7318 states and 9006 transitions. [2019-10-14 22:02:29,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:29,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 387 [2019-10-14 22:02:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:29,205 INFO L225 Difference]: With dead ends: 7318 [2019-10-14 22:02:29,205 INFO L226 Difference]: Without dead ends: 3942 [2019-10-14 22:02:29,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:02:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2019-10-14 22:02:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 3940. [2019-10-14 22:02:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3940 states. [2019-10-14 22:02:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 4829 transitions. [2019-10-14 22:02:29,299 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 4829 transitions. Word has length 387 [2019-10-14 22:02:29,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:29,300 INFO L462 AbstractCegarLoop]: Abstraction has 3940 states and 4829 transitions. [2019-10-14 22:02:29,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 4829 transitions. [2019-10-14 22:02:29,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2019-10-14 22:02:29,314 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:29,315 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 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] [2019-10-14 22:02:29,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:29,519 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash -197185924, now seen corresponding path program 1 times [2019-10-14 22:02:29,520 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:29,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504934458] [2019-10-14 22:02:29,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:29,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:29,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 294 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:02:30,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504934458] [2019-10-14 22:02:30,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980950262] [2019-10-14 22:02:30,599 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 [2019-10-14 22:02:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:30,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 601 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-10-14 22:02:30,990 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:30,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-14 22:02:30,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057410488] [2019-10-14 22:02:30,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:02:30,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:30,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:02:30,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:30,992 INFO L87 Difference]: Start difference. First operand 3940 states and 4829 transitions. Second operand 9 states. [2019-10-14 22:02:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:33,023 INFO L93 Difference]: Finished difference Result 7700 states and 9473 transitions. [2019-10-14 22:02:33,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:02:33,029 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 497 [2019-10-14 22:02:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:33,044 INFO L225 Difference]: With dead ends: 7700 [2019-10-14 22:02:33,044 INFO L226 Difference]: Without dead ends: 3948 [2019-10-14 22:02:33,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 510 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:02:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2019-10-14 22:02:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3944. [2019-10-14 22:02:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3944 states. [2019-10-14 22:02:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 4591 transitions. [2019-10-14 22:02:33,131 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 4591 transitions. Word has length 497 [2019-10-14 22:02:33,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:33,132 INFO L462 AbstractCegarLoop]: Abstraction has 3944 states and 4591 transitions. [2019-10-14 22:02:33,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:02:33,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 4591 transitions. [2019-10-14 22:02:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2019-10-14 22:02:33,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:33,151 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2019-10-14 22:02:33,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:33,356 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1008975267, now seen corresponding path program 1 times [2019-10-14 22:02:33,356 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:33,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996750603] [2019-10-14 22:02:33,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:33,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:33,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 403 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-14 22:02:34,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996750603] [2019-10-14 22:02:34,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483839453] [2019-10-14 22:02:34,726 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 [2019-10-14 22:02:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:02:34,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:34,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 789 proven. 2 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-14 22:02:35,323 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:35,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:02:35,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82607299] [2019-10-14 22:02:35,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:02:35,325 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:35,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:02:35,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:35,325 INFO L87 Difference]: Start difference. First operand 3944 states and 4591 transitions. Second operand 12 states.