/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/Problem16_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:17:38,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:17:38,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:17:38,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:17:38,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:17:38,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:17:38,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:17:38,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:17:38,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:17:38,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:17:38,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:17:38,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:17:38,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:17:38,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:17:38,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:17:38,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:17:38,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:17:38,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:17:38,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:17:38,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:17:38,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:17:38,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:17:38,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:17:38,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:17:38,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:17:38,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:17:38,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:17:38,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:17:38,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:17:38,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:17:38,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:17:38,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:17:38,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:17:38,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:17:38,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:17:38,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:17:38,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:17:38,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:17:38,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:17:38,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:17:38,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:17:38,667 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 19:17:38,681 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:17:38,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:17:38,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:17:38,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:17:38,683 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:17:38,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:17:38,684 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:17:38,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:17:38,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:17:38,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:17:38,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:17:38,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:17:38,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:17:38,685 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:17:38,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:17:38,685 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:17:38,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:17:38,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:17:38,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:17:38,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:17:38,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:17:38,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:17:38,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:17:38,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:17:38,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:17:38,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:17:38,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:17:38,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:17:38,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:17:39,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:17:39,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:17:39,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:17:39,050 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:17:39,050 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:17:39,051 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-11-06 19:17:39,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba7f1117/721d226f1e2947058ed51a4180144621/FLAGce64f4cc6 [2019-11-06 19:17:39,750 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:17:39,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-11-06 19:17:39,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba7f1117/721d226f1e2947058ed51a4180144621/FLAGce64f4cc6 [2019-11-06 19:17:39,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba7f1117/721d226f1e2947058ed51a4180144621 [2019-11-06 19:17:39,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:17:39,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:17:39,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:39,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:17:39,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:17:39,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:39" (1/1) ... [2019-11-06 19:17:39,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec017b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:39, skipping insertion in model container [2019-11-06 19:17:39,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:39" (1/1) ... [2019-11-06 19:17:39,997 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:17:40,081 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:17:40,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:40,957 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:17:41,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:41,488 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:17:41,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41 WrapperNode [2019-11-06 19:17:41,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:41,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:17:41,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:17:41,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:17:41,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (1/1) ... [2019-11-06 19:17:41,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:17:41,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:17:41,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:17:41,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:17:41,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (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 19:17:41,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:41,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:41,752 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:41,752 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:41,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:17:44,000 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:17:44,001 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:17:44,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:44 BoogieIcfgContainer [2019-11-06 19:17:44,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:17:44,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:17:44,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:17:44,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:17:44,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:17:39" (1/3) ... [2019-11-06 19:17:44,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f944f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:44, skipping insertion in model container [2019-11-06 19:17:44,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:41" (2/3) ... [2019-11-06 19:17:44,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f944f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:44, skipping insertion in model container [2019-11-06 19:17:44,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:44" (3/3) ... [2019-11-06 19:17:44,011 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label16.c [2019-11-06 19:17:44,022 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:17:44,031 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:17:44,044 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:17:44,074 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:17:44,074 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:17:44,074 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:17:44,074 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:17:44,074 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:17:44,074 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:17:44,075 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:17:44,075 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:17:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:17:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 19:17:44,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:44,112 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, 1, 1, 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 19:17:44,114 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:44,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1899898085, now seen corresponding path program 1 times [2019-11-06 19:17:44,130 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:44,130 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402981841] [2019-11-06 19:17:44,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:44,500 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 19:17:44,501 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402981841] [2019-11-06 19:17:44,502 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:44,502 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:17:44,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574420115] [2019-11-06 19:17:44,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:44,509 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:44,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:44,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:17:44,527 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:17:49,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:49,927 INFO L93 Difference]: Finished difference Result 1515 states and 2847 transitions. [2019-11-06 19:17:49,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:17:49,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2019-11-06 19:17:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:49,960 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:17:49,960 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:17:49,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:17:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:17:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:17:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:17:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1629 transitions. [2019-11-06 19:17:50,104 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1629 transitions. Word has length 48 [2019-11-06 19:17:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:50,105 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1629 transitions. [2019-11-06 19:17:50,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1629 transitions. [2019-11-06 19:17:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 19:17:50,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:50,112 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:17:50,112 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash 301606541, now seen corresponding path program 1 times [2019-11-06 19:17:50,113 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:50,113 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863359958] [2019-11-06 19:17:50,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:50,530 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863359958] [2019-11-06 19:17:50,530 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:50,530 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:17:50,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926331409] [2019-11-06 19:17:50,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:17:50,533 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:50,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:17:50,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:17:50,534 INFO L87 Difference]: Start difference. First operand 1031 states and 1629 transitions. Second operand 8 states. [2019-11-06 19:17:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:57,719 INFO L93 Difference]: Finished difference Result 3900 states and 6464 transitions. [2019-11-06 19:17:57,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:17:57,721 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-11-06 19:17:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:57,750 INFO L225 Difference]: With dead ends: 3900 [2019-11-06 19:17:57,750 INFO L226 Difference]: Without dead ends: 2875 [2019-11-06 19:17:57,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:17:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2019-11-06 19:17:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2811. [2019-11-06 19:17:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2811 states. [2019-11-06 19:17:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4308 transitions. [2019-11-06 19:17:57,900 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4308 transitions. Word has length 123 [2019-11-06 19:17:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:57,903 INFO L462 AbstractCegarLoop]: Abstraction has 2811 states and 4308 transitions. [2019-11-06 19:17:57,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:17:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4308 transitions. [2019-11-06 19:17:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 19:17:57,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:57,939 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:17:57,939 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1614630469, now seen corresponding path program 1 times [2019-11-06 19:17:57,940 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:57,940 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864311121] [2019-11-06 19:17:57,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:58,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864311121] [2019-11-06 19:17:58,236 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:58,236 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:58,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728644309] [2019-11-06 19:17:58,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:58,238 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:58,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:58,238 INFO L87 Difference]: Start difference. First operand 2811 states and 4308 transitions. Second operand 9 states. [2019-11-06 19:18:04,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:04,232 INFO L93 Difference]: Finished difference Result 9864 states and 15975 transitions. [2019-11-06 19:18:04,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:18:04,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2019-11-06 19:18:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:04,277 INFO L225 Difference]: With dead ends: 9864 [2019-11-06 19:18:04,277 INFO L226 Difference]: Without dead ends: 7059 [2019-11-06 19:18:04,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:18:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2019-11-06 19:18:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 7025. [2019-11-06 19:18:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7025 states. [2019-11-06 19:18:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7025 states to 7025 states and 10409 transitions. [2019-11-06 19:18:04,498 INFO L78 Accepts]: Start accepts. Automaton has 7025 states and 10409 transitions. Word has length 127 [2019-11-06 19:18:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:04,501 INFO L462 AbstractCegarLoop]: Abstraction has 7025 states and 10409 transitions. [2019-11-06 19:18:04,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:18:04,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7025 states and 10409 transitions. [2019-11-06 19:18:04,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-11-06 19:18:04,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:04,509 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:04,509 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:04,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:04,509 INFO L82 PathProgramCache]: Analyzing trace with hash 462428277, now seen corresponding path program 1 times [2019-11-06 19:18:04,510 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:04,510 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212383615] [2019-11-06 19:18:04,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:18:05,012 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212383615] [2019-11-06 19:18:05,012 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899836406] [2019-11-06 19:18:05,012 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 19:18:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:05,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:05,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:05,368 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:05,368 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:18:05,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487028192] [2019-11-06 19:18:05,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:05,372 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:05,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:05,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:05,373 INFO L87 Difference]: Start difference. First operand 7025 states and 10409 transitions. Second operand 11 states. [2019-11-06 19:18:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:10,135 INFO L93 Difference]: Finished difference Result 17510 states and 26765 transitions. [2019-11-06 19:18:10,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:18:10,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 222 [2019-11-06 19:18:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:10,194 INFO L225 Difference]: With dead ends: 17510 [2019-11-06 19:18:10,194 INFO L226 Difference]: Without dead ends: 10491 [2019-11-06 19:18:10,221 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:18:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2019-11-06 19:18:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 8749. [2019-11-06 19:18:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8749 states. [2019-11-06 19:18:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8749 states to 8749 states and 12758 transitions. [2019-11-06 19:18:10,519 INFO L78 Accepts]: Start accepts. Automaton has 8749 states and 12758 transitions. Word has length 222 [2019-11-06 19:18:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:10,520 INFO L462 AbstractCegarLoop]: Abstraction has 8749 states and 12758 transitions. [2019-11-06 19:18:10,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:18:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 8749 states and 12758 transitions. [2019-11-06 19:18:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-11-06 19:18:10,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:10,528 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 19:18:10,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:10,733 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:10,734 INFO L82 PathProgramCache]: Analyzing trace with hash -986396595, now seen corresponding path program 1 times [2019-11-06 19:18:10,734 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:10,735 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501218793] [2019-11-06 19:18:10,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 82 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:11,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501218793] [2019-11-06 19:18:11,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256799242] [2019-11-06 19:18:11,264 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 19:18:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:11,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:11,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-06 19:18:11,611 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:11,612 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:11,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122680337] [2019-11-06 19:18:11,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:11,614 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:11,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:11,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:11,615 INFO L87 Difference]: Start difference. First operand 8749 states and 12758 transitions. Second operand 5 states. [2019-11-06 19:18:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:14,094 INFO L93 Difference]: Finished difference Result 19591 states and 28696 transitions. [2019-11-06 19:18:14,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:18:14,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 298 [2019-11-06 19:18:14,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:14,165 INFO L225 Difference]: With dead ends: 19591 [2019-11-06 19:18:14,166 INFO L226 Difference]: Without dead ends: 10848 [2019-11-06 19:18:14,201 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10848 states. [2019-11-06 19:18:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10848 to 9442. [2019-11-06 19:18:14,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9442 states. [2019-11-06 19:18:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 12597 transitions. [2019-11-06 19:18:14,666 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 12597 transitions. Word has length 298 [2019-11-06 19:18:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:14,667 INFO L462 AbstractCegarLoop]: Abstraction has 9442 states and 12597 transitions. [2019-11-06 19:18:14,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 12597 transitions. [2019-11-06 19:18:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2019-11-06 19:18:14,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:14,685 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:14,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:14,890 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1511616815, now seen corresponding path program 1 times [2019-11-06 19:18:14,893 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:14,893 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179607874] [2019-11-06 19:18:14,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:18:15,582 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179607874] [2019-11-06 19:18:15,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79775311] [2019-11-06 19:18:15,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:18:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:15,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:15,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:15,981 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:15,982 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:15,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871203737] [2019-11-06 19:18:15,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:15,995 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:15,996 INFO L87 Difference]: Start difference. First operand 9442 states and 12597 transitions. Second operand 11 states.