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_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:06,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:06,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:06,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:06,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:06,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:06,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:06,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:06,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:06,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:06,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:06,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:06,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:06,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:06,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:06,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:06,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:06,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:06,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:06,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:06,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:06,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:06,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:06,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:06,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:00:06,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:00:06,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:00:06,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:00:06,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:00:06,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:00:06,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:00:06,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:00:06,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:00:06,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:06,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:06,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:06,635 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 18:00:06,655 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:06,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:06,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:06,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:06,659 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:06,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:06,659 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:06,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:06,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:06,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:06,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:06,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:06,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:06,662 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:06,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:06,662 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:06,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:06,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:06,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:06,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:06,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:06,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:06,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:06,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:06,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:06,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:06,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:06,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:06,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:06,957 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:06,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:06,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:06,977 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:06,977 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:06,978 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-10-13 18:00:07,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bcca0190/c0bca308920f4ec29e99f271e0bd198b/FLAG63311567d [2019-10-13 18:00:07,739 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:07,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-10-13 18:00:07,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bcca0190/c0bca308920f4ec29e99f271e0bd198b/FLAG63311567d [2019-10-13 18:00:07,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bcca0190/c0bca308920f4ec29e99f271e0bd198b [2019-10-13 18:00:07,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:07,926 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:07,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:07,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:07,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:07,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:07" (1/1) ... [2019-10-13 18:00:07,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5627da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:07, skipping insertion in model container [2019-10-13 18:00:07,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:07" (1/1) ... [2019-10-13 18:00:07,949 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:08,029 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:08,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:08,756 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:08,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:08,989 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:08,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08 WrapperNode [2019-10-13 18:00:08,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:08,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:08,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:08,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:09,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:09,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:09,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:09,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:09,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:09,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:09,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:09,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:09,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:09,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:09,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:09,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (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 18:00:09,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:09,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:09,279 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:09,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:11,282 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:11,282 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:11,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:11 BoogieIcfgContainer [2019-10-13 18:00:11,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:11,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:11,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:11,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:11,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:07" (1/3) ... [2019-10-13 18:00:11,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aee9096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:11, skipping insertion in model container [2019-10-13 18:00:11,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (2/3) ... [2019-10-13 18:00:11,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aee9096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:11, skipping insertion in model container [2019-10-13 18:00:11,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:11" (3/3) ... [2019-10-13 18:00:11,295 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label28.c [2019-10-13 18:00:11,306 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:11,315 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:11,328 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:11,360 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:11,360 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:11,360 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:11,360 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:11,361 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:11,361 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:11,361 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:11,361 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 18:00:11,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:11,400 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] [2019-10-13 18:00:11,402 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:11,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1610348989, now seen corresponding path program 1 times [2019-10-13 18:00:11,419 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:11,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219152346] [2019-10-13 18:00:11,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:11,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:11,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:11,920 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 18:00:11,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219152346] [2019-10-13 18:00:11,922 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:11,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:11,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142625741] [2019-10-13 18:00:11,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:11,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:11,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:11,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:11,948 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:00:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:15,535 INFO L93 Difference]: Finished difference Result 990 states and 1774 transitions. [2019-10-13 18:00:15,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:15,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-10-13 18:00:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:15,559 INFO L225 Difference]: With dead ends: 990 [2019-10-13 18:00:15,559 INFO L226 Difference]: Without dead ends: 629 [2019-10-13 18:00:15,567 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 18:00:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-13 18:00:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625. [2019-10-13 18:00:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-10-13 18:00:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions. [2019-10-13 18:00:15,716 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 54 [2019-10-13 18:00:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:15,717 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 865 transitions. [2019-10-13 18:00:15,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions. [2019-10-13 18:00:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 18:00:15,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:15,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:15,727 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1973618443, now seen corresponding path program 1 times [2019-10-13 18:00:15,728 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:15,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639609537] [2019-10-13 18:00:15,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:15,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:15,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:16,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639609537] [2019-10-13 18:00:16,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204034076] [2019-10-13 18:00:16,059 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 18:00:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:16,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:16,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:16,224 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:16,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:16,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143844023] [2019-10-13 18:00:16,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:16,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:16,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:16,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:16,230 INFO L87 Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 3 states. [2019-10-13 18:00:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:17,380 INFO L93 Difference]: Finished difference Result 1826 states and 2564 transitions. [2019-10-13 18:00:17,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:17,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2019-10-13 18:00:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:17,392 INFO L225 Difference]: With dead ends: 1826 [2019-10-13 18:00:17,392 INFO L226 Difference]: Without dead ends: 1207 [2019-10-13 18:00:17,395 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 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 18:00:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2019-10-13 18:00:17,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1197. [2019-10-13 18:00:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2019-10-13 18:00:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1562 transitions. [2019-10-13 18:00:17,441 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1562 transitions. Word has length 127 [2019-10-13 18:00:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:17,442 INFO L462 AbstractCegarLoop]: Abstraction has 1197 states and 1562 transitions. [2019-10-13 18:00:17,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1562 transitions. [2019-10-13 18:00:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 18:00:17,447 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:17,449 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:17,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:17,651 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1882924734, now seen corresponding path program 1 times [2019-10-13 18:00:17,652 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:17,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912913172] [2019-10-13 18:00:17,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:17,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:17,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:17,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912913172] [2019-10-13 18:00:17,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51256582] [2019-10-13 18:00:17,920 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 18:00:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:17,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:18,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:18,083 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:18,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:18,083 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617272615] [2019-10-13 18:00:18,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:18,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:18,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:18,085 INFO L87 Difference]: Start difference. First operand 1197 states and 1562 transitions. Second operand 3 states. [2019-10-13 18:00:19,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:19,284 INFO L93 Difference]: Finished difference Result 2970 states and 3983 transitions. [2019-10-13 18:00:19,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:19,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2019-10-13 18:00:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:19,294 INFO L225 Difference]: With dead ends: 2970 [2019-10-13 18:00:19,294 INFO L226 Difference]: Without dead ends: 1779 [2019-10-13 18:00:19,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 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 18:00:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2019-10-13 18:00:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1769. [2019-10-13 18:00:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2019-10-13 18:00:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2354 transitions. [2019-10-13 18:00:19,354 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2354 transitions. Word has length 128 [2019-10-13 18:00:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:19,355 INFO L462 AbstractCegarLoop]: Abstraction has 1769 states and 2354 transitions. [2019-10-13 18:00:19,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2354 transitions. [2019-10-13 18:00:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 18:00:19,358 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:19,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:19,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:19,563 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:19,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:19,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1199392174, now seen corresponding path program 1 times [2019-10-13 18:00:19,563 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:19,563 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324607597] [2019-10-13 18:00:19,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:19,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:19,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:19,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324607597] [2019-10-13 18:00:19,798 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:19,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:00:19,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855385067] [2019-10-13 18:00:19,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:00:19,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:00:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:00:19,800 INFO L87 Difference]: Start difference. First operand 1769 states and 2354 transitions. Second operand 8 states. [2019-10-13 18:00:22,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:22,712 INFO L93 Difference]: Finished difference Result 4940 states and 6805 transitions. [2019-10-13 18:00:22,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:00:22,717 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-13 18:00:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:22,735 INFO L225 Difference]: With dead ends: 4940 [2019-10-13 18:00:22,736 INFO L226 Difference]: Without dead ends: 3177 [2019-10-13 18:00:22,741 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 [2019-10-13 18:00:22,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2019-10-13 18:00:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 3160. [2019-10-13 18:00:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3160 states. [2019-10-13 18:00:22,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4065 transitions. [2019-10-13 18:00:22,860 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4065 transitions. Word has length 134 [2019-10-13 18:00:22,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:22,862 INFO L462 AbstractCegarLoop]: Abstraction has 3160 states and 4065 transitions. [2019-10-13 18:00:22,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:00:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4065 transitions. [2019-10-13 18:00:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-13 18:00:22,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:22,867 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:22,867 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:22,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:22,868 INFO L82 PathProgramCache]: Analyzing trace with hash -10605268, now seen corresponding path program 1 times [2019-10-13 18:00:22,868 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:22,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849458823] [2019-10-13 18:00:22,869 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:22,869 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:22,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:23,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849458823] [2019-10-13 18:00:23,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019898016] [2019-10-13 18:00:23,181 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 18:00:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:23,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:23,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:23,367 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:23,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-10-13 18:00:23,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29343503] [2019-10-13 18:00:23,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:23,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:23,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:23,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:00:23,369 INFO L87 Difference]: Start difference. First operand 3160 states and 4065 transitions. Second operand 3 states. [2019-10-13 18:00:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:24,585 INFO L93 Difference]: Finished difference Result 6897 states and 9088 transitions. [2019-10-13 18:00:24,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:24,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2019-10-13 18:00:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:24,615 INFO L225 Difference]: With dead ends: 6897 [2019-10-13 18:00:24,615 INFO L226 Difference]: Without dead ends: 3931 [2019-10-13 18:00:24,627 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:00:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2019-10-13 18:00:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3360. [2019-10-13 18:00:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3360 states. [2019-10-13 18:00:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4432 transitions. [2019-10-13 18:00:24,773 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4432 transitions. Word has length 185 [2019-10-13 18:00:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:24,774 INFO L462 AbstractCegarLoop]: Abstraction has 3360 states and 4432 transitions. [2019-10-13 18:00:24,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4432 transitions. [2019-10-13 18:00:24,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-13 18:00:24,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:24,789 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:24,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:24,995 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash -91916028, now seen corresponding path program 1 times [2019-10-13 18:00:24,996 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:24,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787575505] [2019-10-13 18:00:24,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:24,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:24,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 66 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:25,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787575505] [2019-10-13 18:00:25,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728668034] [2019-10-13 18:00:25,848 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 18:00:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:25,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:00:25,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:26,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 18:00:26,234 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:26,234 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2019-10-13 18:00:26,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264359434] [2019-10-13 18:00:26,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:26,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:26,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:26,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:00:26,238 INFO L87 Difference]: Start difference. First operand 3360 states and 4432 transitions. Second operand 5 states. [2019-10-13 18:00:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:28,291 INFO L93 Difference]: Finished difference Result 6980 states and 9288 transitions. [2019-10-13 18:00:28,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:28,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2019-10-13 18:00:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:28,312 INFO L225 Difference]: With dead ends: 6980 [2019-10-13 18:00:28,312 INFO L226 Difference]: Without dead ends: 3626 [2019-10-13 18:00:28,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:00:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2019-10-13 18:00:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 3583. [2019-10-13 18:00:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3583 states. [2019-10-13 18:00:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4700 transitions. [2019-10-13 18:00:28,410 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4700 transitions. Word has length 207 [2019-10-13 18:00:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:28,410 INFO L462 AbstractCegarLoop]: Abstraction has 3583 states and 4700 transitions. [2019-10-13 18:00:28,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:28,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4700 transitions. [2019-10-13 18:00:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-13 18:00:28,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:28,416 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:28,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:28,621 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:28,622 INFO L82 PathProgramCache]: Analyzing trace with hash 563951691, now seen corresponding path program 1 times [2019-10-13 18:00:28,622 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:28,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804177170] [2019-10-13 18:00:28,623 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:28,623 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:28,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:00:29,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804177170] [2019-10-13 18:00:29,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807066166] [2019-10-13 18:00:29,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:29,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:29,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:29,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:29,320 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:29,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2019-10-13 18:00:29,320 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598286878] [2019-10-13 18:00:29,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:00:29,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:29,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:00:29,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:00:29,322 INFO L87 Difference]: Start difference. First operand 3583 states and 4700 transitions. Second operand 12 states. [2019-10-13 18:00:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:39,142 INFO L93 Difference]: Finished difference Result 11996 states and 17253 transitions. [2019-10-13 18:00:39,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-13 18:00:39,142 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 250 [2019-10-13 18:00:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:39,178 INFO L225 Difference]: With dead ends: 11996 [2019-10-13 18:00:39,178 INFO L226 Difference]: Without dead ends: 8419 [2019-10-13 18:00:39,191 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=515, Invalid=2791, Unknown=0, NotChecked=0, Total=3306 [2019-10-13 18:00:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2019-10-13 18:00:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 8106. [2019-10-13 18:00:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8106 states. [2019-10-13 18:00:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8106 states to 8106 states and 10240 transitions. [2019-10-13 18:00:39,414 INFO L78 Accepts]: Start accepts. Automaton has 8106 states and 10240 transitions. Word has length 250 [2019-10-13 18:00:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:39,415 INFO L462 AbstractCegarLoop]: Abstraction has 8106 states and 10240 transitions. [2019-10-13 18:00:39,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:00:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 8106 states and 10240 transitions. [2019-10-13 18:00:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-10-13 18:00:39,429 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:39,430 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:39,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:39,643 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:39,644 INFO L82 PathProgramCache]: Analyzing trace with hash 11397960, now seen corresponding path program 1 times [2019-10-13 18:00:39,644 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:39,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390536051] [2019-10-13 18:00:39,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:39,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:39,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-10-13 18:00:39,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390536051] [2019-10-13 18:00:39,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035422884] [2019-10-13 18:00:39,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:40,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:00:40,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 151 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:00:40,243 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:40,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 18:00:40,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787777165] [2019-10-13 18:00:40,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 18:00:40,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:40,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 18:00:40,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:40,245 INFO L87 Difference]: Start difference. First operand 8106 states and 10240 transitions. Second operand 7 states. [2019-10-13 18:00:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:43,036 INFO L93 Difference]: Finished difference Result 22553 states and 30724 transitions. [2019-10-13 18:00:43,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 18:00:43,037 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 292 [2019-10-13 18:00:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:43,109 INFO L225 Difference]: With dead ends: 22553 [2019-10-13 18:00:43,109 INFO L226 Difference]: Without dead ends: 14453 [2019-10-13 18:00:43,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:00:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14453 states. [2019-10-13 18:00:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14453 to 12542. [2019-10-13 18:00:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12542 states. [2019-10-13 18:00:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12542 states to 12542 states and 16071 transitions. [2019-10-13 18:00:43,592 INFO L78 Accepts]: Start accepts. Automaton has 12542 states and 16071 transitions. Word has length 292 [2019-10-13 18:00:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:43,593 INFO L462 AbstractCegarLoop]: Abstraction has 12542 states and 16071 transitions. [2019-10-13 18:00:43,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 18:00:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 12542 states and 16071 transitions. [2019-10-13 18:00:43,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2019-10-13 18:00:43,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:43,619 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:43,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:43,824 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash -777562786, now seen corresponding path program 1 times [2019-10-13 18:00:43,824 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:43,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966651140] [2019-10-13 18:00:43,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:43,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:43,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY