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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:53,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:53,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:53,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:53,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:53,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:53,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:53,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:53,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:53,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:53,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:53,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:53,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:53,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:53,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:53,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:53,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:53,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:53,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:53,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:53,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:53,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:53,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:53,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:53,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:00:53,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:00:53,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:00:53,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:00:53,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:00:53,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:00:53,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:00:53,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:00:53,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:00:53,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:00:53,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:00:53,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:00:53,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:00:53,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:00:53,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:53,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:53,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:53,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:00:53,634 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:53,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:53,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:53,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:53,636 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:53,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:53,636 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:53,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:53,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:53,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:53,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:53,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:53,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:53,638 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:53,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:53,638 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:53,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:53,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:53,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:53,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:53,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:53,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:53,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:53,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:53,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:53,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:53,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:53,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:53,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:53,928 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:53,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:53,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:53,959 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:53,959 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:53,960 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-10-13 18:00:54,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/251b888c8/bdf28ff85d4540bea8811732be34da80/FLAGe0309a89c [2019-10-13 18:00:54,659 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:54,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-10-13 18:00:54,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/251b888c8/bdf28ff85d4540bea8811732be34da80/FLAGe0309a89c [2019-10-13 18:00:54,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/251b888c8/bdf28ff85d4540bea8811732be34da80 [2019-10-13 18:00:54,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:54,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:54,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:54,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:54,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:54,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:54" (1/1) ... [2019-10-13 18:00:54,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d46bbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:54, skipping insertion in model container [2019-10-13 18:00:54,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:54" (1/1) ... [2019-10-13 18:00:54,957 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:55,024 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:55,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:55,646 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:55,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:55,982 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:55,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:55 WrapperNode [2019-10-13 18:00:55,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:55,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:55,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:55,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:56,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:55" (1/1) ... [2019-10-13 18:00:56,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:55" (1/1) ... [2019-10-13 18:00:56,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:55" (1/1) ... [2019-10-13 18:00:56,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:55" (1/1) ... [2019-10-13 18:00:56,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:55" (1/1) ... [2019-10-13 18:00:56,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:55" (1/1) ... [2019-10-13 18:00:56,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:55" (1/1) ... [2019-10-13 18:00:56,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:56,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:56,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:56,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:56,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:56,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:56,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:56,264 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:56,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:56,265 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:56,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:56,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:56,266 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:56,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:56,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:56,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:58,126 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:58,126 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:58,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:58 BoogieIcfgContainer [2019-10-13 18:00:58,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:58,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:58,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:58,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:58,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:54" (1/3) ... [2019-10-13 18:00:58,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28026e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:58, skipping insertion in model container [2019-10-13 18:00:58,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:55" (2/3) ... [2019-10-13 18:00:58,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28026e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:58, skipping insertion in model container [2019-10-13 18:00:58,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:58" (3/3) ... [2019-10-13 18:00:58,138 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label55.c [2019-10-13 18:00:58,149 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:58,159 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:58,171 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:58,200 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:58,201 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:58,201 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:58,201 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:58,201 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:58,201 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:58,201 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:58,202 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-13 18:00:58,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:58,241 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] [2019-10-13 18:00:58,243 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:58,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:58,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1587257066, now seen corresponding path program 1 times [2019-10-13 18:00:58,262 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:58,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245778766] [2019-10-13 18:00:58,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:58,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:58,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:58,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245778766] [2019-10-13 18:00:58,795 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:58,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:58,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421369358] [2019-10-13 18:00:58,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:58,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:58,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:58,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:58,821 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:01:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:02,452 INFO L93 Difference]: Finished difference Result 987 states and 1769 transitions. [2019-10-13 18:01:02,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:01:02,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2019-10-13 18:01:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:02,489 INFO L225 Difference]: With dead ends: 987 [2019-10-13 18:01:02,490 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 18:01:02,506 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:01:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 18:01:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 426. [2019-10-13 18:01:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-13 18:01:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 611 transitions. [2019-10-13 18:01:02,644 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 611 transitions. Word has length 51 [2019-10-13 18:01:02,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:02,645 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 611 transitions. [2019-10-13 18:01:02,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 611 transitions. [2019-10-13 18:01:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 18:01:02,660 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:02,662 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:01:02,662 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:02,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1592222806, now seen corresponding path program 1 times [2019-10-13 18:01:02,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:02,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634192161] [2019-10-13 18:01:02,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:02,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:02,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:03,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634192161] [2019-10-13 18:01:03,121 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:03,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:01:03,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273281154] [2019-10-13 18:01:03,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:01:03,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:01:03,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:01:03,127 INFO L87 Difference]: Start difference. First operand 426 states and 611 transitions. Second operand 9 states. [2019-10-13 18:01:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:06,328 INFO L93 Difference]: Finished difference Result 1652 states and 2455 transitions. [2019-10-13 18:01:06,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:01:06,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2019-10-13 18:01:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:06,337 INFO L225 Difference]: With dead ends: 1652 [2019-10-13 18:01:06,338 INFO L226 Difference]: Without dead ends: 1232 [2019-10-13 18:01:06,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:01:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2019-10-13 18:01:06,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1203. [2019-10-13 18:01:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2019-10-13 18:01:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1684 transitions. [2019-10-13 18:01:06,389 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1684 transitions. Word has length 123 [2019-10-13 18:01:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:06,390 INFO L462 AbstractCegarLoop]: Abstraction has 1203 states and 1684 transitions. [2019-10-13 18:01:06,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:01:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1684 transitions. [2019-10-13 18:01:06,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 18:01:06,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:06,393 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:01:06,393 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:06,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:06,393 INFO L82 PathProgramCache]: Analyzing trace with hash -654834599, now seen corresponding path program 1 times [2019-10-13 18:01:06,394 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:06,394 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505154504] [2019-10-13 18:01:06,394 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:06,394 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:06,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:06,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505154504] [2019-10-13 18:01:06,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578362189] [2019-10-13 18:01:06,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:01:06,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:06,823 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:01:06,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:01:06,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956371290] [2019-10-13 18:01:06,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:01:06,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:06,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:01:06,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:01:06,835 INFO L87 Difference]: Start difference. First operand 1203 states and 1684 transitions. Second operand 3 states. [2019-10-13 18:01:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:07,812 INFO L93 Difference]: Finished difference Result 2796 states and 3920 transitions. [2019-10-13 18:01:07,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:01:07,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-10-13 18:01:07,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:07,823 INFO L225 Difference]: With dead ends: 2796 [2019-10-13 18:01:07,823 INFO L226 Difference]: Without dead ends: 1599 [2019-10-13 18:01:07,827 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:01:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2019-10-13 18:01:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1589. [2019-10-13 18:01:07,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1589 states. [2019-10-13 18:01:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2180 transitions. [2019-10-13 18:01:07,877 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2180 transitions. Word has length 124 [2019-10-13 18:01:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:07,878 INFO L462 AbstractCegarLoop]: Abstraction has 1589 states and 2180 transitions. [2019-10-13 18:01:07,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:01:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2180 transitions. [2019-10-13 18:01:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 18:01:07,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:07,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:01:08,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:08,093 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:08,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1691608690, now seen corresponding path program 1 times [2019-10-13 18:01:08,094 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:08,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240753259] [2019-10-13 18:01:08,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:08,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:08,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:08,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240753259] [2019-10-13 18:01:08,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718219850] [2019-10-13 18:01:08,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:08,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:01:08,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:08,404 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:01:08,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:01:08,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760143596] [2019-10-13 18:01:08,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:01:08,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:08,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:01:08,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:01:08,408 INFO L87 Difference]: Start difference. First operand 1589 states and 2180 transitions. Second operand 3 states. [2019-10-13 18:01:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:09,563 INFO L93 Difference]: Finished difference Result 3182 states and 4394 transitions. [2019-10-13 18:01:09,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:01:09,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-13 18:01:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:09,576 INFO L225 Difference]: With dead ends: 3182 [2019-10-13 18:01:09,576 INFO L226 Difference]: Without dead ends: 1599 [2019-10-13 18:01:09,581 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:01:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2019-10-13 18:01:09,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1589. [2019-10-13 18:01:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1589 states. [2019-10-13 18:01:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2140 transitions. [2019-10-13 18:01:09,634 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2140 transitions. Word has length 125 [2019-10-13 18:01:09,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:09,637 INFO L462 AbstractCegarLoop]: Abstraction has 1589 states and 2140 transitions. [2019-10-13 18:01:09,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:01:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2140 transitions. [2019-10-13 18:01:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 18:01:09,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:09,644 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:01:09,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:09,850 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash 649342070, now seen corresponding path program 1 times [2019-10-13 18:01:09,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:09,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992341920] [2019-10-13 18:01:09,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:09,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:09,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:10,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992341920] [2019-10-13 18:01:10,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117158263] [2019-10-13 18:01:10,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:10,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:01:10,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:10,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:01:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:10,524 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:01:10,524 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2019-10-13 18:01:10,524 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119793473] [2019-10-13 18:01:10,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:01:10,525 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:10,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:01:10,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:01:10,526 INFO L87 Difference]: Start difference. First operand 1589 states and 2140 transitions. Second operand 5 states. [2019-10-13 18:01:12,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:12,209 INFO L93 Difference]: Finished difference Result 3808 states and 5175 transitions. [2019-10-13 18:01:12,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:01:12,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-10-13 18:01:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:12,223 INFO L225 Difference]: With dead ends: 3808 [2019-10-13 18:01:12,223 INFO L226 Difference]: Without dead ends: 2225 [2019-10-13 18:01:12,228 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:01:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2019-10-13 18:01:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2201. [2019-10-13 18:01:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2201 states. [2019-10-13 18:01:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 2858 transitions. [2019-10-13 18:01:12,290 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 2858 transitions. Word has length 145 [2019-10-13 18:01:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:12,291 INFO L462 AbstractCegarLoop]: Abstraction has 2201 states and 2858 transitions. [2019-10-13 18:01:12,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 2858 transitions. [2019-10-13 18:01:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-10-13 18:01:12,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:12,297 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:01:12,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:12,500 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1626151708, now seen corresponding path program 1 times [2019-10-13 18:01:12,501 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:12,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736390532] [2019-10-13 18:01:12,501 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:12,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:12,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 87 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:01:13,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736390532] [2019-10-13 18:01:13,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858142010] [2019-10-13 18:01:13,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:13,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 18:01:13,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:13,829 WARN L191 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2019-10-13 18:01:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 18:01:13,997 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:13,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2019-10-13 18:01:13,998 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996935264] [2019-10-13 18:01:13,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 18:01:13,999 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:13,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 18:01:13,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:01:13,999 INFO L87 Difference]: Start difference. First operand 2201 states and 2858 transitions. Second operand 15 states. [2019-10-13 18:01:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:32,957 INFO L93 Difference]: Finished difference Result 15165 states and 22706 transitions. [2019-10-13 18:01:32,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-10-13 18:01:32,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 261 [2019-10-13 18:01:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:33,038 INFO L225 Difference]: With dead ends: 15165 [2019-10-13 18:01:33,039 INFO L226 Difference]: Without dead ends: 13158 [2019-10-13 18:01:33,054 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1345, Invalid=6311, Unknown=0, NotChecked=0, Total=7656 [2019-10-13 18:01:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13158 states. [2019-10-13 18:01:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13158 to 13073. [2019-10-13 18:01:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13073 states. [2019-10-13 18:01:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13073 states to 13073 states and 18036 transitions. [2019-10-13 18:01:33,578 INFO L78 Accepts]: Start accepts. Automaton has 13073 states and 18036 transitions. Word has length 261 [2019-10-13 18:01:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:33,579 INFO L462 AbstractCegarLoop]: Abstraction has 13073 states and 18036 transitions. [2019-10-13 18:01:33,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 18:01:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 13073 states and 18036 transitions. [2019-10-13 18:01:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2019-10-13 18:01:33,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:33,607 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:01:33,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:33,812 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash 51966613, now seen corresponding path program 1 times [2019-10-13 18:01:33,813 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:33,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446060027] [2019-10-13 18:01:33,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:33,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:33,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-10-13 18:01:34,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446060027] [2019-10-13 18:01:34,141 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:34,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:01:34,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361056893] [2019-10-13 18:01:34,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 18:01:34,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 18:01:34,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:01:34,146 INFO L87 Difference]: Start difference. First operand 13073 states and 18036 transitions. Second operand 6 states.