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/Problem11_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:58:59,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:58:59,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:58:59,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:58:59,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:58:59,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:58:59,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:58:59,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:58:59,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:58:59,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:58:59,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:58:59,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:58:59,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:58:59,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:58:59,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:58:59,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:58:59,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:58:59,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:58:59,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:58:59,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:58:59,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:58:59,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:58:59,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:58:59,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:58:59,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:58:59,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:58:59,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:58:59,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:58:59,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:58:59,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:58:59,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:58:59,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:58:59,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:58:59,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:58:59,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:58:59,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:58:59,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:58:59,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:58:59,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:58:59,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:58:59,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:58:59,322 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:58:59,357 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:58:59,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:58:59,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:58:59,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:58:59,359 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:58:59,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:58:59,361 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:58:59,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:58:59,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:58:59,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:58:59,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:58:59,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:58:59,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:58:59,363 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:58:59,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:58:59,363 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:58:59,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:58:59,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:58:59,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:58:59,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:58:59,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:58:59,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:58:59,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:58:59,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:58:59,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:58:59,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:58:59,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:58:59,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:58:59,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:58:59,628 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:58:59,644 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:58:59,647 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:58:59,649 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:58:59,649 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:58:59,650 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label23.c [2019-10-14 21:58:59,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9033bb3f9/26ee756e2f0b4cf397f86cfeb3302bfa/FLAGb9faf2cf3 [2019-10-14 21:59:00,319 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:59:00,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label23.c [2019-10-14 21:59:00,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9033bb3f9/26ee756e2f0b4cf397f86cfeb3302bfa/FLAGb9faf2cf3 [2019-10-14 21:59:00,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9033bb3f9/26ee756e2f0b4cf397f86cfeb3302bfa [2019-10-14 21:59:00,612 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:59:00,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:59:00,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:00,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:59:00,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:59:00,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:00" (1/1) ... [2019-10-14 21:59:00,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e4cadf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00, skipping insertion in model container [2019-10-14 21:59:00,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:00" (1/1) ... [2019-10-14 21:59:00,629 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:59:00,689 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:59:01,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:01,298 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:59:01,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:01,507 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:59:01,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:01 WrapperNode [2019-10-14 21:59:01,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:01,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:59:01,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:59:01,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:59:01,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:01" (1/1) ... [2019-10-14 21:59:01,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:01" (1/1) ... [2019-10-14 21:59:01,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:01" (1/1) ... [2019-10-14 21:59:01,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:01" (1/1) ... [2019-10-14 21:59:01,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:01" (1/1) ... [2019-10-14 21:59:01,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:01" (1/1) ... [2019-10-14 21:59:01,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:01" (1/1) ... [2019-10-14 21:59:01,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:59:01,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:59:01,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:59:01,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:59:01,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:59:01,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:59:01,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:59:01,767 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:59:01,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:59:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:59:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:59:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:59:01,770 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:59:01,770 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:59:01,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:59:01,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:59:03,654 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:59:03,654 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:59:03,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:03 BoogieIcfgContainer [2019-10-14 21:59:03,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:59:03,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:59:03,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:59:03,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:59:03,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:59:00" (1/3) ... [2019-10-14 21:59:03,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3e331c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:03, skipping insertion in model container [2019-10-14 21:59:03,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:01" (2/3) ... [2019-10-14 21:59:03,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3e331c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:03, skipping insertion in model container [2019-10-14 21:59:03,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:03" (3/3) ... [2019-10-14 21:59:03,693 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label23.c [2019-10-14 21:59:03,703 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:59:03,711 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:59:03,723 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:59:03,751 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:59:03,752 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:59:03,752 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:59:03,752 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:59:03,755 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:59:03,756 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:59:03,756 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:59:03,756 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:59:03,799 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-14 21:59:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:59:03,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:03,809 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:03,811 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:03,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1552063366, now seen corresponding path program 1 times [2019-10-14 21:59:03,822 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:03,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537706552] [2019-10-14 21:59:03,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:03,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:03,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:04,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537706552] [2019-10-14 21:59:04,192 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:04,192 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:59:04,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71383267] [2019-10-14 21:59:04,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:04,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:04,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:04,214 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-14 21:59:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:07,278 INFO L93 Difference]: Finished difference Result 998 states and 1793 transitions. [2019-10-14 21:59:07,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:07,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2019-10-14 21:59:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:07,301 INFO L225 Difference]: With dead ends: 998 [2019-10-14 21:59:07,301 INFO L226 Difference]: Without dead ends: 638 [2019-10-14 21:59:07,311 INFO L600 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 [2019-10-14 21:59:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-14 21:59:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 621. [2019-10-14 21:59:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-14 21:59:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 950 transitions. [2019-10-14 21:59:07,416 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 950 transitions. Word has length 71 [2019-10-14 21:59:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:07,417 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 950 transitions. [2019-10-14 21:59:07,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 950 transitions. [2019-10-14 21:59:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 21:59:07,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:07,426 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:59:07,426 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:07,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1937579030, now seen corresponding path program 1 times [2019-10-14 21:59:07,427 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:07,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285990992] [2019-10-14 21:59:07,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:07,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:07,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:07,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285990992] [2019-10-14 21:59:07,785 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:07,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:59:07,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675072705] [2019-10-14 21:59:07,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:59:07,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:07,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:59:07,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:07,791 INFO L87 Difference]: Start difference. First operand 621 states and 950 transitions. Second operand 8 states. [2019-10-14 21:59:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:11,572 INFO L93 Difference]: Finished difference Result 2487 states and 4246 transitions. [2019-10-14 21:59:11,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:59:11,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 141 [2019-10-14 21:59:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:11,599 INFO L225 Difference]: With dead ends: 2487 [2019-10-14 21:59:11,600 INFO L226 Difference]: Without dead ends: 1872 [2019-10-14 21:59:11,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:59:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2019-10-14 21:59:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1816. [2019-10-14 21:59:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-14 21:59:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2597 transitions. [2019-10-14 21:59:11,760 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2597 transitions. Word has length 141 [2019-10-14 21:59:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:11,763 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2597 transitions. [2019-10-14 21:59:11,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2597 transitions. [2019-10-14 21:59:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-14 21:59:11,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:11,780 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:59:11,780 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:11,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1983928202, now seen corresponding path program 1 times [2019-10-14 21:59:11,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:11,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859375559] [2019-10-14 21:59:11,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:11,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:11,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:12,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859375559] [2019-10-14 21:59:12,074 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:12,074 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:59:12,075 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229800290] [2019-10-14 21:59:12,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:59:12,076 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:12,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:59:12,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:12,076 INFO L87 Difference]: Start difference. First operand 1816 states and 2597 transitions. Second operand 8 states. [2019-10-14 21:59:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:14,828 INFO L93 Difference]: Finished difference Result 5268 states and 7936 transitions. [2019-10-14 21:59:14,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:59:14,835 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 151 [2019-10-14 21:59:14,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:14,860 INFO L225 Difference]: With dead ends: 5268 [2019-10-14 21:59:14,860 INFO L226 Difference]: Without dead ends: 3458 [2019-10-14 21:59:14,868 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:59:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3458 states. [2019-10-14 21:59:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 3233. [2019-10-14 21:59:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3233 states. [2019-10-14 21:59:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4504 transitions. [2019-10-14 21:59:15,002 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 4504 transitions. Word has length 151 [2019-10-14 21:59:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:15,004 INFO L462 AbstractCegarLoop]: Abstraction has 3233 states and 4504 transitions. [2019-10-14 21:59:15,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 4504 transitions. [2019-10-14 21:59:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-14 21:59:15,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:15,011 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:15,011 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:15,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:15,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1698562555, now seen corresponding path program 1 times [2019-10-14 21:59:15,012 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:15,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811843096] [2019-10-14 21:59:15,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:15,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:15,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:15,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811843096] [2019-10-14 21:59:15,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360891434] [2019-10-14 21:59:15,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:15,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:59:15,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:15,621 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:15,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-14 21:59:15,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156565834] [2019-10-14 21:59:15,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:59:15,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:15,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:59:15,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:15,623 INFO L87 Difference]: Start difference. First operand 3233 states and 4504 transitions. Second operand 8 states. [2019-10-14 21:59:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:17,963 INFO L93 Difference]: Finished difference Result 6540 states and 9942 transitions. [2019-10-14 21:59:17,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:59:17,964 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 214 [2019-10-14 21:59:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:17,987 INFO L225 Difference]: With dead ends: 6540 [2019-10-14 21:59:17,988 INFO L226 Difference]: Without dead ends: 3313 [2019-10-14 21:59:18,000 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:59:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2019-10-14 21:59:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 2993. [2019-10-14 21:59:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2019-10-14 21:59:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 3905 transitions. [2019-10-14 21:59:18,112 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 3905 transitions. Word has length 214 [2019-10-14 21:59:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:18,115 INFO L462 AbstractCegarLoop]: Abstraction has 2993 states and 3905 transitions. [2019-10-14 21:59:18,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 3905 transitions. [2019-10-14 21:59:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-14 21:59:18,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:18,122 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:18,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:18,330 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:18,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:18,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1529010873, now seen corresponding path program 1 times [2019-10-14 21:59:18,331 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:18,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387481101] [2019-10-14 21:59:18,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:18,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:18,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:59:18,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387481101] [2019-10-14 21:59:18,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383888069] [2019-10-14 21:59:18,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:18,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:18,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:59:18,790 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:18,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:59:18,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563949789] [2019-10-14 21:59:18,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:18,791 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:18,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:18,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:18,792 INFO L87 Difference]: Start difference. First operand 2993 states and 3905 transitions. Second operand 3 states. [2019-10-14 21:59:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:19,877 INFO L93 Difference]: Finished difference Result 7518 states and 10149 transitions. [2019-10-14 21:59:19,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:19,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2019-10-14 21:59:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:19,896 INFO L225 Difference]: With dead ends: 7518 [2019-10-14 21:59:19,896 INFO L226 Difference]: Without dead ends: 4531 [2019-10-14 21:59:19,904 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 229 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2019-10-14 21:59:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 4139. [2019-10-14 21:59:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2019-10-14 21:59:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5492 transitions. [2019-10-14 21:59:20,035 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 5492 transitions. Word has length 224 [2019-10-14 21:59:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:20,036 INFO L462 AbstractCegarLoop]: Abstraction has 4139 states and 5492 transitions. [2019-10-14 21:59:20,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 5492 transitions. [2019-10-14 21:59:20,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-10-14 21:59:20,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:20,050 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:20,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:20,265 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:20,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:20,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2030409120, now seen corresponding path program 1 times [2019-10-14 21:59:20,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:20,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32513703] [2019-10-14 21:59:20,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:20,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:20,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 133 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:20,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32513703] [2019-10-14 21:59:20,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464608629] [2019-10-14 21:59:20,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:20,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:59:20,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:20,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-14 21:59:20,977 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:20,977 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-14 21:59:20,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117573009] [2019-10-14 21:59:20,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:20,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:20,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:20,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:59:20,979 INFO L87 Difference]: Start difference. First operand 4139 states and 5492 transitions. Second operand 5 states. [2019-10-14 21:59:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:22,358 INFO L93 Difference]: Finished difference Result 8337 states and 11181 transitions. [2019-10-14 21:59:22,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:22,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 275 [2019-10-14 21:59:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:22,381 INFO L225 Difference]: With dead ends: 8337 [2019-10-14 21:59:22,382 INFO L226 Difference]: Without dead ends: 4204 [2019-10-14 21:59:22,395 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:59:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2019-10-14 21:59:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 4155. [2019-10-14 21:59:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4155 states. [2019-10-14 21:59:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5503 transitions. [2019-10-14 21:59:22,502 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 5503 transitions. Word has length 275 [2019-10-14 21:59:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:22,502 INFO L462 AbstractCegarLoop]: Abstraction has 4155 states and 5503 transitions. [2019-10-14 21:59:22,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 5503 transitions. [2019-10-14 21:59:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-10-14 21:59:22,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:22,510 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:22,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:22,724 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:22,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:22,724 INFO L82 PathProgramCache]: Analyzing trace with hash 624431733, now seen corresponding path program 1 times [2019-10-14 21:59:22,725 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:22,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021526059] [2019-10-14 21:59:22,725 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:22,725 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:22,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-10-14 21:59:23,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021526059] [2019-10-14 21:59:23,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341621137] [2019-10-14 21:59:23,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:23,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:59:23,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 168 proven. 63 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:59:23,269 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:23,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:59:23,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193003767] [2019-10-14 21:59:23,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:59:23,271 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:23,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:59:23,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:23,272 INFO L87 Difference]: Start difference. First operand 4155 states and 5503 transitions. Second operand 7 states. [2019-10-14 21:59:25,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:25,011 INFO L93 Difference]: Finished difference Result 8394 states and 11573 transitions. [2019-10-14 21:59:25,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:25,012 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 309 [2019-10-14 21:59:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:25,037 INFO L225 Difference]: With dead ends: 8394 [2019-10-14 21:59:25,038 INFO L226 Difference]: Without dead ends: 4245 [2019-10-14 21:59:25,049 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:59:25,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2019-10-14 21:59:25,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 4155. [2019-10-14 21:59:25,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4155 states. [2019-10-14 21:59:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5231 transitions. [2019-10-14 21:59:25,215 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 5231 transitions. Word has length 309 [2019-10-14 21:59:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:25,217 INFO L462 AbstractCegarLoop]: Abstraction has 4155 states and 5231 transitions. [2019-10-14 21:59:25,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:59:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 5231 transitions. [2019-10-14 21:59:25,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-10-14 21:59:25,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:25,233 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:25,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:25,447 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:25,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1568781761, now seen corresponding path program 1 times [2019-10-14 21:59:25,448 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:25,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925094679] [2019-10-14 21:59:25,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:25,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:25,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 21:59:25,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925094679] [2019-10-14 21:59:25,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611283143] [2019-10-14 21:59:25,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:25,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:59:25,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:25,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:25,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:27,256 WARN L191 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-10-14 21:59:27,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 21:59:28,958 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:28,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2019-10-14 21:59:28,959 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869997825] [2019-10-14 21:59:28,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:59:28,960 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:28,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:59:28,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2019-10-14 21:59:28,961 INFO L87 Difference]: Start difference. First operand 4155 states and 5231 transitions. Second operand 11 states. [2019-10-14 21:59:36,543 WARN L191 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 32 DAG size of output: 13