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_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:31,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:31,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:31,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:31,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:31,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:31,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:31,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:31,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:31,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:31,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:31,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:31,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:31,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:31,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:31,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:31,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:31,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:31,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:31,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:31,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:31,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:31,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:31,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:31,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:31,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:31,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:31,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:31,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:31,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:31,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:31,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:31,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:31,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:31,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:31,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:31,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:03:31,312 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:31,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:31,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:31,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:31,314 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:31,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:31,315 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:31,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:31,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:31,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:31,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:31,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:31,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:31,316 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:31,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:31,316 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:31,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:31,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:31,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:31,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:31,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:31,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:31,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:31,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:31,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:31,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:31,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:31,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:31,319 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:31,616 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:31,637 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:31,640 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:31,642 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:31,642 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:31,643 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label52.c [2019-10-13 18:03:31,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab558d17/42999af2419b424ca16c39da43c05dba/FLAG1f52867fd [2019-10-13 18:03:32,313 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:32,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label52.c [2019-10-13 18:03:32,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab558d17/42999af2419b424ca16c39da43c05dba/FLAG1f52867fd [2019-10-13 18:03:32,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab558d17/42999af2419b424ca16c39da43c05dba [2019-10-13 18:03:32,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:32,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:32,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:32,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:32,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:32,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:32" (1/1) ... [2019-10-13 18:03:32,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b22563b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:32, skipping insertion in model container [2019-10-13 18:03:32,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:32" (1/1) ... [2019-10-13 18:03:32,604 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:32,670 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:33,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:33,342 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:33,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:33,523 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:33,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33 WrapperNode [2019-10-13 18:03:33,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:33,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:33,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:33,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:33,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... [2019-10-13 18:03:33,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:33,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:33,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:33,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:33,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:33,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:33,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:33,816 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:33,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:33,817 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:33,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:33,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:33,818 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:33,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:33,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:33,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:35,635 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:35,638 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:35,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:35 BoogieIcfgContainer [2019-10-13 18:03:35,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:35,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:35,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:35,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:35,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:32" (1/3) ... [2019-10-13 18:03:35,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7985ea7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:35, skipping insertion in model container [2019-10-13 18:03:35,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:33" (2/3) ... [2019-10-13 18:03:35,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7985ea7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:35, skipping insertion in model container [2019-10-13 18:03:35,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:35" (3/3) ... [2019-10-13 18:03:35,649 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label52.c [2019-10-13 18:03:35,660 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:35,669 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:35,681 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:35,710 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:35,711 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:35,711 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:35,711 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:35,711 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:35,711 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:35,712 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:35,712 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:03:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 18:03:35,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:35,746 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] [2019-10-13 18:03:35,748 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:35,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2120821501, now seen corresponding path program 1 times [2019-10-13 18:03:35,764 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:35,764 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793961104] [2019-10-13 18:03:35,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:35,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:35,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:36,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793961104] [2019-10-13 18:03:36,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:36,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:03:36,081 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433293595] [2019-10-13 18:03:36,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:36,086 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:36,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:36,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:36,104 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:03:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:38,869 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:03:38,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:38,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-13 18:03:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:38,897 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:03:38,897 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:03:38,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:03:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:03:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:03:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:03:39,012 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 28 [2019-10-13 18:03:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:39,013 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:03:39,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:03:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 18:03:39,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:39,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:39,020 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:39,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1199804154, now seen corresponding path program 1 times [2019-10-13 18:03:39,021 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:39,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514452257] [2019-10-13 18:03:39,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:39,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:39,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:39,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514452257] [2019-10-13 18:03:39,369 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:39,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:03:39,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723009692] [2019-10-13 18:03:39,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:39,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:39,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:39,373 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:03:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:41,304 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-13 18:03:41,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:03:41,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 114 [2019-10-13 18:03:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:41,312 INFO L225 Difference]: With dead ends: 1320 [2019-10-13 18:03:41,312 INFO L226 Difference]: Without dead ends: 768 [2019-10-13 18:03:41,315 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 [2019-10-13 18:03:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-13 18:03:41,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-13 18:03:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-13 18:03:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-13 18:03:41,349 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 114 [2019-10-13 18:03:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:41,350 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-13 18:03:41,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-13 18:03:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 18:03:41,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:41,353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:41,354 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash 217144121, now seen corresponding path program 1 times [2019-10-13 18:03:41,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:41,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692494373] [2019-10-13 18:03:41,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:41,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:41,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:41,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692494373] [2019-10-13 18:03:41,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618306639] [2019-10-13 18:03:41,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:41,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:41,755 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:41,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:41,756 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330821859] [2019-10-13 18:03:41,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:41,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:41,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:41,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:41,768 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-13 18:03:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:42,705 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-10-13 18:03:42,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:42,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-10-13 18:03:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:42,714 INFO L225 Difference]: With dead ends: 1680 [2019-10-13 18:03:42,714 INFO L226 Difference]: Without dead ends: 1120 [2019-10-13 18:03:42,716 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-10-13 18:03:42,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-10-13 18:03:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-13 18:03:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-10-13 18:03:42,755 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 123 [2019-10-13 18:03:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:42,756 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-10-13 18:03:42,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-10-13 18:03:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-13 18:03:42,762 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:42,762 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:03:42,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:42,969 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1938372875, now seen corresponding path program 1 times [2019-10-13 18:03:42,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:42,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836210684] [2019-10-13 18:03:42,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:42,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:42,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 18:03:43,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836210684] [2019-10-13 18:03:43,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816516091] [2019-10-13 18:03:43,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:43,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 18:03:43,490 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:43,490 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:43,491 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019030470] [2019-10-13 18:03:43,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:43,493 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:43,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:43,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:43,493 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-10-13 18:03:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:44,444 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-10-13 18:03:44,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:44,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 226 [2019-10-13 18:03:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:44,455 INFO L225 Difference]: With dead ends: 2414 [2019-10-13 18:03:44,455 INFO L226 Difference]: Without dead ends: 1486 [2019-10-13 18:03:44,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-10-13 18:03:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-10-13 18:03:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-10-13 18:03:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-10-13 18:03:44,508 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 226 [2019-10-13 18:03:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:44,510 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-10-13 18:03:44,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-10-13 18:03:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-10-13 18:03:44,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:44,542 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:03:44,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:44,744 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1616242422, now seen corresponding path program 1 times [2019-10-13 18:03:44,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:44,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876953897] [2019-10-13 18:03:44,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:44,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:44,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 18:03:45,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876953897] [2019-10-13 18:03:45,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656562065] [2019-10-13 18:03:45,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:45,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:45,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 18:03:45,278 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:45,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:45,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029868934] [2019-10-13 18:03:45,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:45,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:45,282 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 3 states. [2019-10-13 18:03:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:46,144 INFO L93 Difference]: Finished difference Result 3156 states and 4351 transitions. [2019-10-13 18:03:46,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:46,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 245 [2019-10-13 18:03:46,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:46,160 INFO L225 Difference]: With dead ends: 3156 [2019-10-13 18:03:46,160 INFO L226 Difference]: Without dead ends: 1858 [2019-10-13 18:03:46,165 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2019-10-13 18:03:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1674. [2019-10-13 18:03:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-10-13 18:03:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2298 transitions. [2019-10-13 18:03:46,233 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2298 transitions. Word has length 245 [2019-10-13 18:03:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:46,239 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2298 transitions. [2019-10-13 18:03:46,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2298 transitions. [2019-10-13 18:03:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-10-13 18:03:46,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:46,246 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:03:46,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:46,451 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:46,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1603017994, now seen corresponding path program 1 times [2019-10-13 18:03:46,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:46,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054767104] [2019-10-13 18:03:46,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:46,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:46,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 131 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:46,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054767104] [2019-10-13 18:03:46,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440319617] [2019-10-13 18:03:46,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:46,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:46,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 18:03:47,100 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:47,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-13 18:03:47,101 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279307743] [2019-10-13 18:03:47,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:47,102 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:47,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:47,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:47,103 INFO L87 Difference]: Start difference. First operand 1674 states and 2298 transitions. Second operand 5 states. [2019-10-13 18:03:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:48,565 INFO L93 Difference]: Finished difference Result 3930 states and 5406 transitions. [2019-10-13 18:03:48,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:48,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2019-10-13 18:03:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:48,578 INFO L225 Difference]: With dead ends: 3930 [2019-10-13 18:03:48,578 INFO L226 Difference]: Without dead ends: 2262 [2019-10-13 18:03:48,583 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:03:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2019-10-13 18:03:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2070. [2019-10-13 18:03:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-10-13 18:03:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2743 transitions. [2019-10-13 18:03:48,647 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2743 transitions. Word has length 251 [2019-10-13 18:03:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:48,648 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2743 transitions. [2019-10-13 18:03:48,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2743 transitions. [2019-10-13 18:03:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2019-10-13 18:03:48,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:48,656 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:48,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:48,865 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:48,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1140395773, now seen corresponding path program 1 times [2019-10-13 18:03:48,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:48,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670198564] [2019-10-13 18:03:48,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:48,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:48,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 73 proven. 262 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:50,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670198564] [2019-10-13 18:03:50,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127799989] [2019-10-13 18:03:50,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:50,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:50,367 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 267 proven. 53 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 18:03:50,690 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:50,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:03:50,691 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101896407] [2019-10-13 18:03:50,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:50,692 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:50,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:50,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:50,693 INFO L87 Difference]: Start difference. First operand 2070 states and 2743 transitions. Second operand 16 states. [2019-10-13 18:03:52,303 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2019-10-13 18:03:55,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:55,272 INFO L93 Difference]: Finished difference Result 4460 states and 5930 transitions. [2019-10-13 18:03:55,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 18:03:55,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 335 [2019-10-13 18:03:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:55,285 INFO L225 Difference]: With dead ends: 4460 [2019-10-13 18:03:55,285 INFO L226 Difference]: Without dead ends: 2349 [2019-10-13 18:03:55,292 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:03:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2019-10-13 18:03:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2268. [2019-10-13 18:03:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2019-10-13 18:03:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2754 transitions. [2019-10-13 18:03:55,358 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2754 transitions. Word has length 335 [2019-10-13 18:03:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:55,358 INFO L462 AbstractCegarLoop]: Abstraction has 2268 states and 2754 transitions. [2019-10-13 18:03:55,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:03:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2754 transitions. [2019-10-13 18:03:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2019-10-13 18:03:55,366 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:55,366 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:55,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:55,570 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:55,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1826153040, now seen corresponding path program 1 times [2019-10-13 18:03:55,571 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:55,571 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411839078] [2019-10-13 18:03:55,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:55,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:55,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 262 proven. 22 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-13 18:03:56,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411839078] [2019-10-13 18:03:56,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865890359] [2019-10-13 18:03:56,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:56,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:56,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:56,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:03:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-13 18:03:56,335 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:56,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-13 18:03:56,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418178725] [2019-10-13 18:03:56,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:56,337 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:56,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:56,343 INFO L87 Difference]: Start difference. First operand 2268 states and 2754 transitions. Second operand 5 states. [2019-10-13 18:03:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:57,637 INFO L93 Difference]: Finished difference Result 5098 states and 6238 transitions. [2019-10-13 18:03:57,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:57,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 360 [2019-10-13 18:03:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:57,650 INFO L225 Difference]: With dead ends: 5098 [2019-10-13 18:03:57,651 INFO L226 Difference]: Without dead ends: 2836 [2019-10-13 18:03:57,657 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:03:57,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-13 18:03:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2832. [2019-10-13 18:03:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-10-13 18:03:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3446 transitions. [2019-10-13 18:03:57,730 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3446 transitions. Word has length 360 [2019-10-13 18:03:57,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:57,731 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3446 transitions. [2019-10-13 18:03:57,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3446 transitions. [2019-10-13 18:03:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2019-10-13 18:03:57,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:57,744 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:57,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:57,949 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:57,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1132852189, now seen corresponding path program 1 times [2019-10-13 18:03:57,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:57,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655632885] [2019-10-13 18:03:57,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:57,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:57,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 310 proven. 110 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:03:58,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655632885] [2019-10-13 18:03:58,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663548000] [2019-10-13 18:03:58,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:58,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:58,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 612 proven. 2 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-13 18:03:59,159 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:59,160 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:03:59,160 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485378279] [2019-10-13 18:03:59,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:59,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:59,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:59,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:59,165 INFO L87 Difference]: Start difference. First operand 2832 states and 3446 transitions. Second operand 9 states. [2019-10-13 18:04:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:01,263 INFO L93 Difference]: Finished difference Result 5490 states and 6736 transitions. [2019-10-13 18:04:01,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:04:01,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 470 [2019-10-13 18:04:01,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:01,274 INFO L225 Difference]: With dead ends: 5490 [2019-10-13 18:04:01,275 INFO L226 Difference]: Without dead ends: 2846 [2019-10-13 18:04:01,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 483 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-10-13 18:04:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2842. [2019-10-13 18:04:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2019-10-13 18:04:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3315 transitions. [2019-10-13 18:04:01,342 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3315 transitions. Word has length 470 [2019-10-13 18:04:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:01,343 INFO L462 AbstractCegarLoop]: Abstraction has 2842 states and 3315 transitions. [2019-10-13 18:04:01,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:04:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3315 transitions. [2019-10-13 18:04:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2019-10-13 18:04:01,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:01,350 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:01,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:01,555 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:01,556 INFO L82 PathProgramCache]: Analyzing trace with hash 684069276, now seen corresponding path program 1 times [2019-10-13 18:04:01,556 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:01,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808428057] [2019-10-13 18:04:01,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:01,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:01,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 423 proven. 118 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-13 18:04:03,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808428057] [2019-10-13 18:04:03,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716814321] [2019-10-13 18:04:03,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:03,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:04:03,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:03,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:04:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 804 proven. 2 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2019-10-13 18:04:03,766 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:03,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:04:03,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003984500] [2019-10-13 18:04:03,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:04:03,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:03,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:04:03,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:04:03,768 INFO L87 Difference]: Start difference. First operand 2842 states and 3315 transitions. Second operand 12 states. [2019-10-13 18:04:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:06,020 INFO L93 Difference]: Finished difference Result 5780 states and 6763 transitions. [2019-10-13 18:04:06,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:04:06,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 554 [2019-10-13 18:04:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:06,038 INFO L225 Difference]: With dead ends: 5780 [2019-10-13 18:04:06,038 INFO L226 Difference]: Without dead ends: 3085 [2019-10-13 18:04:06,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 573 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:04:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2019-10-13 18:04:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2834. [2019-10-13 18:04:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-10-13 18:04:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3182 transitions. [2019-10-13 18:04:06,109 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3182 transitions. Word has length 554 [2019-10-13 18:04:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:06,110 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3182 transitions. [2019-10-13 18:04:06,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:04:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3182 transitions. [2019-10-13 18:04:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2019-10-13 18:04:06,118 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:06,119 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:06,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:06,323 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:06,324 INFO L82 PathProgramCache]: Analyzing trace with hash 965736368, now seen corresponding path program 2 times [2019-10-13 18:04:06,325 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:06,325 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830510939] [2019-10-13 18:04:06,325 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:06,325 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:06,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat