/usr/bin/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_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:13:39,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:13:39,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:13:39,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:13:39,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:13:39,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:13:39,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:13:39,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:13:39,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:13:39,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:13:39,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:13:39,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:13:39,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:13:39,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:13:39,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:13:39,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:13:39,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:13:39,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:13:39,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:13:39,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:13:39,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:13:39,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:13:39,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:13:39,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:13:39,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:13:39,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:13:39,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:13:39,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:13:39,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:13:39,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:13:39,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:13:39,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:13:39,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:13:39,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:13:39,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:13:39,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:13:39,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:13:39,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:13:39,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:13:39,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:13:39,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:13:39,426 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 [2019-11-06 19:13:39,440 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:13:39,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:13:39,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:13:39,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:13:39,441 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:13:39,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:13:39,442 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:13:39,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:13:39,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:13:39,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:13:39,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:13:39,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:13:39,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:13:39,443 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:13:39,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:13:39,444 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:13:39,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:13:39,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:13:39,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:13:39,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:13:39,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:13:39,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:13:39,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:13:39,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:13:39,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:13:39,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:13:39,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:13:39,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:13:39,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:13:39,730 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:13:39,744 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:13:39,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:13:39,749 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:13:39,749 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:13:39,750 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label29.c [2019-11-06 19:13:39,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ffce67b/e1ea7bedf0d74c5fbfc1735a293a0515/FLAG21d04daa4 [2019-11-06 19:13:40,398 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:13:40,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label29.c [2019-11-06 19:13:40,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ffce67b/e1ea7bedf0d74c5fbfc1735a293a0515/FLAG21d04daa4 [2019-11-06 19:13:40,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ffce67b/e1ea7bedf0d74c5fbfc1735a293a0515 [2019-11-06 19:13:40,649 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:13:40,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:13:40,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:13:40,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:13:40,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:13:40,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:13:40" (1/1) ... [2019-11-06 19:13:40,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363f3198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:40, skipping insertion in model container [2019-11-06 19:13:40,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:13:40" (1/1) ... [2019-11-06 19:13:40,668 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:13:40,728 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:13:41,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:13:41,189 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:13:41,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:13:41,586 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:13:41,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:41 WrapperNode [2019-11-06 19:13:41,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:13:41,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:13:41,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:13:41,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:13:41,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:41" (1/1) ... [2019-11-06 19:13:41,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:41" (1/1) ... [2019-11-06 19:13:41,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:41" (1/1) ... [2019-11-06 19:13:41,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:41" (1/1) ... [2019-11-06 19:13:41,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:41" (1/1) ... [2019-11-06 19:13:41,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:41" (1/1) ... [2019-11-06 19:13:41,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:41" (1/1) ... [2019-11-06 19:13:41,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:13:41,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:13:41,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:13:41,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:13:41,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:41" (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 [2019-11-06 19:13:41,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:13:41,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:13:41,865 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:13:41,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:13:41,865 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:13:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:13:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:13:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:13:41,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:13:41,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:13:41,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:13:43,469 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:13:43,470 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:13:43,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:13:43 BoogieIcfgContainer [2019-11-06 19:13:43,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:13:43,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:13:43,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:13:43,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:13:43,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:13:40" (1/3) ... [2019-11-06 19:13:43,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e29671c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:13:43, skipping insertion in model container [2019-11-06 19:13:43,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:41" (2/3) ... [2019-11-06 19:13:43,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e29671c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:13:43, skipping insertion in model container [2019-11-06 19:13:43,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:13:43" (3/3) ... [2019-11-06 19:13:43,480 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label29.c [2019-11-06 19:13:43,490 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:13:43,499 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:13:43,511 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:13:43,540 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:13:43,540 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:13:43,540 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:13:43,540 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:13:43,540 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:13:43,541 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:13:43,541 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:13:43,541 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:13:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:13:43,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 19:13:43,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:43,573 INFO L410 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] [2019-11-06 19:13:43,575 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:43,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1085195851, now seen corresponding path program 1 times [2019-11-06 19:13:43,590 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:43,590 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006642575] [2019-11-06 19:13:43,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:43,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006642575] [2019-11-06 19:13:43,863 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:13:43,863 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:13:43,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98029634] [2019-11-06 19:13:43,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:43,871 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:43,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:43,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:13:43,888 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:13:48,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:48,856 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-11-06 19:13:48,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:13:48,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-06 19:13:48,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:48,878 INFO L225 Difference]: With dead ends: 902 [2019-11-06 19:13:48,878 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:13:48,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:13:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-11-06 19:13:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-11-06 19:13:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 782 transitions. [2019-11-06 19:13:48,993 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 782 transitions. Word has length 22 [2019-11-06 19:13:48,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:48,994 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 782 transitions. [2019-11-06 19:13:48,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:48,994 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 782 transitions. [2019-11-06 19:13:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 19:13:49,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:49,002 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:49,002 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash 503601434, now seen corresponding path program 1 times [2019-11-06 19:13:49,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:49,003 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712378288] [2019-11-06 19:13:49,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:49,450 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712378288] [2019-11-06 19:13:49,450 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581487999] [2019-11-06 19:13:49,450 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 [2019-11-06 19:13:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:49,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:49,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:49,635 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:49,635 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:13:49,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002358588] [2019-11-06 19:13:49,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:49,638 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:49,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:49,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:49,639 INFO L87 Difference]: Start difference. First operand 560 states and 782 transitions. Second operand 3 states. [2019-11-06 19:13:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:50,546 INFO L93 Difference]: Finished difference Result 1666 states and 2358 transitions. [2019-11-06 19:13:50,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:50,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-11-06 19:13:50,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:50,554 INFO L225 Difference]: With dead ends: 1666 [2019-11-06 19:13:50,554 INFO L226 Difference]: Without dead ends: 1112 [2019-11-06 19:13:50,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-11-06 19:13:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-11-06 19:13:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-11-06 19:13:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1515 transitions. [2019-11-06 19:13:50,603 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1515 transitions. Word has length 134 [2019-11-06 19:13:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:50,604 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1515 transitions. [2019-11-06 19:13:50,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1515 transitions. [2019-11-06 19:13:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 19:13:50,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:50,610 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:50,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:50,819 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:50,820 INFO L82 PathProgramCache]: Analyzing trace with hash -859831850, now seen corresponding path program 1 times [2019-11-06 19:13:50,820 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:50,820 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359197183] [2019-11-06 19:13:50,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:51,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359197183] [2019-11-06 19:13:51,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500804784] [2019-11-06 19:13:51,136 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 [2019-11-06 19:13:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:51,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:51,294 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:51,295 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:13:51,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215551404] [2019-11-06 19:13:51,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:51,305 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:51,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:51,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:51,306 INFO L87 Difference]: Start difference. First operand 1112 states and 1515 transitions. Second operand 3 states. [2019-11-06 19:13:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:52,176 INFO L93 Difference]: Finished difference Result 1664 states and 2315 transitions. [2019-11-06 19:13:52,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:52,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 152 [2019-11-06 19:13:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:52,188 INFO L225 Difference]: With dead ends: 1664 [2019-11-06 19:13:52,188 INFO L226 Difference]: Without dead ends: 1662 [2019-11-06 19:13:52,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-11-06 19:13:52,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1296. [2019-11-06 19:13:52,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2019-11-06 19:13:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1824 transitions. [2019-11-06 19:13:52,244 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1824 transitions. Word has length 152 [2019-11-06 19:13:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:52,245 INFO L462 AbstractCegarLoop]: Abstraction has 1296 states and 1824 transitions. [2019-11-06 19:13:52,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1824 transitions. [2019-11-06 19:13:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-06 19:13:52,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:52,251 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:52,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:52,455 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:52,455 INFO L82 PathProgramCache]: Analyzing trace with hash 807627774, now seen corresponding path program 1 times [2019-11-06 19:13:52,456 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:52,456 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695230107] [2019-11-06 19:13:52,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:13:52,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695230107] [2019-11-06 19:13:52,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841044797] [2019-11-06 19:13:52,736 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 [2019-11-06 19:13:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:52,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:52,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:13:52,950 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:52,950 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:13:52,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256837557] [2019-11-06 19:13:52,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:52,952 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:52,954 INFO L87 Difference]: Start difference. First operand 1296 states and 1824 transitions. Second operand 3 states. [2019-11-06 19:13:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:53,756 INFO L93 Difference]: Finished difference Result 3874 states and 5517 transitions. [2019-11-06 19:13:53,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:53,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2019-11-06 19:13:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:53,772 INFO L225 Difference]: With dead ends: 3874 [2019-11-06 19:13:53,772 INFO L226 Difference]: Without dead ends: 2584 [2019-11-06 19:13:53,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2019-11-06 19:13:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1486. [2019-11-06 19:13:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1486 states. [2019-11-06 19:13:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2028 transitions. [2019-11-06 19:13:53,831 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2028 transitions. Word has length 207 [2019-11-06 19:13:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:53,832 INFO L462 AbstractCegarLoop]: Abstraction has 1486 states and 2028 transitions. [2019-11-06 19:13:53,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2028 transitions. [2019-11-06 19:13:53,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-06 19:13:53,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:53,836 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:54,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:54,048 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash -906411563, now seen corresponding path program 1 times [2019-11-06 19:13:54,049 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:54,050 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652272605] [2019-11-06 19:13:54,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:13:54,648 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652272605] [2019-11-06 19:13:54,648 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364256755] [2019-11-06 19:13:54,648 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 [2019-11-06 19:13:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:54,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:13:54,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:54,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:13:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 19:13:54,884 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:54,884 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-11-06 19:13:54,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336090452] [2019-11-06 19:13:54,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:54,885 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:54,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:54,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:13:54,886 INFO L87 Difference]: Start difference. First operand 1486 states and 2028 transitions. Second operand 5 states. [2019-11-06 19:13:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:56,190 INFO L93 Difference]: Finished difference Result 3548 states and 4771 transitions. [2019-11-06 19:13:56,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:13:56,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2019-11-06 19:13:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:56,207 INFO L225 Difference]: With dead ends: 3548 [2019-11-06 19:13:56,208 INFO L226 Difference]: Without dead ends: 1884 [2019-11-06 19:13:56,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 210 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:13:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2019-11-06 19:13:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1872. [2019-11-06 19:13:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2019-11-06 19:13:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2482 transitions. [2019-11-06 19:13:56,287 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2482 transitions. Word has length 208 [2019-11-06 19:13:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:56,291 INFO L462 AbstractCegarLoop]: Abstraction has 1872 states and 2482 transitions. [2019-11-06 19:13:56,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:56,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2482 transitions. [2019-11-06 19:13:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-11-06 19:13:56,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:56,297 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:13:56,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:56,510 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:56,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:56,510 INFO L82 PathProgramCache]: Analyzing trace with hash -616807464, now seen corresponding path program 1 times [2019-11-06 19:13:56,510 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:56,511 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046028257] [2019-11-06 19:13:56,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 130 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-06 19:13:56,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046028257] [2019-11-06 19:13:56,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054659585] [2019-11-06 19:13:56,895 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 [2019-11-06 19:13:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:57,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:13:57,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-06 19:13:57,094 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:57,094 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-11-06 19:13:57,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516580342] [2019-11-06 19:13:57,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:57,097 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:57,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:57,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:13:57,098 INFO L87 Difference]: Start difference. First operand 1872 states and 2482 transitions. Second operand 5 states. [2019-11-06 19:13:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:58,436 INFO L93 Difference]: Finished difference Result 4520 states and 6439 transitions. [2019-11-06 19:13:58,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:13:58,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2019-11-06 19:13:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:58,454 INFO L225 Difference]: With dead ends: 4520 [2019-11-06 19:13:58,454 INFO L226 Difference]: Without dead ends: 2836 [2019-11-06 19:13:58,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:13:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-11-06 19:13:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2808. [2019-11-06 19:13:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2808 states. [2019-11-06 19:13:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 3720 transitions. [2019-11-06 19:13:58,573 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 3720 transitions. Word has length 278 [2019-11-06 19:13:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:58,574 INFO L462 AbstractCegarLoop]: Abstraction has 2808 states and 3720 transitions. [2019-11-06 19:13:58,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 3720 transitions. [2019-11-06 19:13:58,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-11-06 19:13:58,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:58,580 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:13:58,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:58,786 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:58,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1461451740, now seen corresponding path program 1 times [2019-11-06 19:13:58,787 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:58,787 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619032975] [2019-11-06 19:13:58,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 55 proven. 215 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:13:59,863 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619032975] [2019-11-06 19:13:59,863 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28377310] [2019-11-06 19:13:59,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-06 19:13:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:59,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:13:59,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:00,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 208 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 19:14:00,279 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:00,280 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:14:00,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783246974] [2019-11-06 19:14:00,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:14:00,281 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:00,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:14:00,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:14:00,281 INFO L87 Difference]: Start difference. First operand 2808 states and 3720 transitions. Second operand 16 states. [2019-11-06 19:14:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:04,163 INFO L93 Difference]: Finished difference Result 5529 states and 7410 transitions. [2019-11-06 19:14:04,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:14:04,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 292 [2019-11-06 19:14:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:04,177 INFO L225 Difference]: With dead ends: 5529 [2019-11-06 19:14:04,177 INFO L226 Difference]: Without dead ends: 3046 [2019-11-06 19:14:04,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:14:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2019-11-06 19:14:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2998. [2019-11-06 19:14:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2998 states. [2019-11-06 19:14:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 3641 transitions. [2019-11-06 19:14:04,260 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 3641 transitions. Word has length 292 [2019-11-06 19:14:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:04,261 INFO L462 AbstractCegarLoop]: Abstraction has 2998 states and 3641 transitions. [2019-11-06 19:14:04,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:14:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 3641 transitions. [2019-11-06 19:14:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-11-06 19:14:04,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:04,268 INFO L410 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:14:04,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:04,472 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash -370135057, now seen corresponding path program 1 times [2019-11-06 19:14:04,473 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:04,473 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828434980] [2019-11-06 19:14:04,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 19:14:05,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828434980] [2019-11-06 19:14:05,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760269555] [2019-11-06 19:14:05,260 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 [2019-11-06 19:14:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:14:05,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:05,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:14:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-06 19:14:05,519 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:05,519 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-11-06 19:14:05,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503586688] [2019-11-06 19:14:05,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:05,521 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:05,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:05,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:14:05,522 INFO L87 Difference]: Start difference. First operand 2998 states and 3641 transitions. Second operand 5 states. [2019-11-06 19:14:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:06,607 INFO L93 Difference]: Finished difference Result 6190 states and 7685 transitions. [2019-11-06 19:14:06,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:14:06,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2019-11-06 19:14:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:06,630 INFO L225 Difference]: With dead ends: 6190 [2019-11-06 19:14:06,630 INFO L226 Difference]: Without dead ends: 3564 [2019-11-06 19:14:06,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:14:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2019-11-06 19:14:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3380. [2019-11-06 19:14:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3380 states. [2019-11-06 19:14:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 4076 transitions. [2019-11-06 19:14:06,715 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 4076 transitions. Word has length 317 [2019-11-06 19:14:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:06,715 INFO L462 AbstractCegarLoop]: Abstraction has 3380 states and 4076 transitions. [2019-11-06 19:14:06,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 4076 transitions. [2019-11-06 19:14:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2019-11-06 19:14:06,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:06,725 INFO L410 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:06,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:06,937 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:06,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:06,938 INFO L82 PathProgramCache]: Analyzing trace with hash -59587684, now seen corresponding path program 1 times [2019-11-06 19:14:06,938 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:06,938 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446808336] [2019-11-06 19:14:06,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 286 proven. 73 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 19:14:07,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446808336] [2019-11-06 19:14:07,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517792850] [2019-11-06 19:14:07,630 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 [2019-11-06 19:14:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:07,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:14:07,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 486 proven. 2 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-11-06 19:14:08,086 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:08,087 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:14:08,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477795662] [2019-11-06 19:14:08,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:14:08,088 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:08,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:14:08,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:14:08,092 INFO L87 Difference]: Start difference. First operand 3380 states and 4076 transitions. Second operand 9 states. [2019-11-06 19:14:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:10,145 INFO L93 Difference]: Finished difference Result 7500 states and 9131 transitions. [2019-11-06 19:14:10,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:14:10,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 427 [2019-11-06 19:14:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:10,163 INFO L225 Difference]: With dead ends: 7500 [2019-11-06 19:14:10,163 INFO L226 Difference]: Without dead ends: 4122 [2019-11-06 19:14:10,170 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 440 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:14:10,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2019-11-06 19:14:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 4122. [2019-11-06 19:14:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4122 states. [2019-11-06 19:14:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 4829 transitions. [2019-11-06 19:14:10,253 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 4829 transitions. Word has length 427 [2019-11-06 19:14:10,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:10,253 INFO L462 AbstractCegarLoop]: Abstraction has 4122 states and 4829 transitions. [2019-11-06 19:14:10,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:14:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 4829 transitions. [2019-11-06 19:14:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2019-11-06 19:14:10,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:10,266 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:10,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:10,467 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:10,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1728846883, now seen corresponding path program 1 times [2019-11-06 19:14:10,468 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:10,468 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715764746] [2019-11-06 19:14:10,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 393 proven. 81 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-11-06 19:14:11,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715764746] [2019-11-06 19:14:11,729 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717762037] [2019-11-06 19:14:11,729 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 [2019-11-06 19:14:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:11,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:14:11,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:11,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 662 proven. 2 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-06 19:14:12,343 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:12,344 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:14:12,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146860086] [2019-11-06 19:14:12,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:14:12,345 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:12,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:14:12,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:14:12,345 INFO L87 Difference]: Start difference. First operand 4122 states and 4829 transitions. Second operand 12 states. [2019-11-06 19:14:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:14,783 INFO L93 Difference]: Finished difference Result 7941 states and 9369 transitions. [2019-11-06 19:14:14,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:14:14,783 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 511 [2019-11-06 19:14:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:14,799 INFO L225 Difference]: With dead ends: 7941 [2019-11-06 19:14:14,800 INFO L226 Difference]: Without dead ends: 4148 [2019-11-06 19:14:14,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 530 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:14:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2019-11-06 19:14:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 4114. [2019-11-06 19:14:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4114 states. [2019-11-06 19:14:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 4635 transitions. [2019-11-06 19:14:14,883 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 4635 transitions. Word has length 511 [2019-11-06 19:14:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:14,884 INFO L462 AbstractCegarLoop]: Abstraction has 4114 states and 4635 transitions. [2019-11-06 19:14:14,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:14:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 4635 transitions. [2019-11-06 19:14:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2019-11-06 19:14:14,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:14,891 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:14:15,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:15,095 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:15,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2077729423, now seen corresponding path program 2 times [2019-11-06 19:14:15,096 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:15,096 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555711910] [2019-11-06 19:14:15,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 616 proven. 162 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-11-06 19:14:16,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555711910] [2019-11-06 19:14:16,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439380494] [2019-11-06 19:14:16,053 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:16,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 19:14:16,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 19:14:16,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:14:16,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:16,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms