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/Problem15_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:44,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:44,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:44,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:44,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:44,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:44,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:44,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:44,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:44,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:44,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:44,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:44,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:44,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:44,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:44,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:44,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:44,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:44,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:44,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:44,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:44,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:44,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:44,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:44,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:44,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:44,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:44,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:44,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:02:44,391 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:44,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:44,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:44,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:44,393 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:44,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:44,393 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:44,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:44,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:44,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:44,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:44,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:44,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:44,395 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:44,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:44,395 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:44,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:44,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:44,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:44,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:44,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:44,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:44,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:44,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:44,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:44,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:44,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:44,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:44,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:44,698 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:44,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:44,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:44,723 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:44,723 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:44,724 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-14 22:02:44,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e39c8c8bb/dd066c94adc04a6898993751554c43ec/FLAGfe762f677 [2019-10-14 22:02:45,529 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:45,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-14 22:02:45,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e39c8c8bb/dd066c94adc04a6898993751554c43ec/FLAGfe762f677 [2019-10-14 22:02:45,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e39c8c8bb/dd066c94adc04a6898993751554c43ec [2019-10-14 22:02:45,664 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:45,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:45,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:45,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:45,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:45,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:45" (1/1) ... [2019-10-14 22:02:45,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c66bfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:45, skipping insertion in model container [2019-10-14 22:02:45,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:45" (1/1) ... [2019-10-14 22:02:45,685 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:45,777 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:46,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:46,740 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:47,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:47,112 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:47,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:47 WrapperNode [2019-10-14 22:02:47,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:47,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:47,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:47,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:47,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:47" (1/1) ... [2019-10-14 22:02:47,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:47" (1/1) ... [2019-10-14 22:02:47,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:47" (1/1) ... [2019-10-14 22:02:47,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:47" (1/1) ... [2019-10-14 22:02:47,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:47" (1/1) ... [2019-10-14 22:02:47,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:47" (1/1) ... [2019-10-14 22:02:47,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:47" (1/1) ... [2019-10-14 22:02:47,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:47,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:47,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:47,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:47,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:47,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:47,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:47,410 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:47,410 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:02:47,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:02:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:47,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:47,412 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:47,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:47,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:47,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:51,731 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:51,731 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:51,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:51 BoogieIcfgContainer [2019-10-14 22:02:51,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:51,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:51,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:51,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:51,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:45" (1/3) ... [2019-10-14 22:02:51,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40872805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:51, skipping insertion in model container [2019-10-14 22:02:51,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:47" (2/3) ... [2019-10-14 22:02:51,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40872805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:51, skipping insertion in model container [2019-10-14 22:02:51,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:51" (3/3) ... [2019-10-14 22:02:51,742 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label03.c [2019-10-14 22:02:51,753 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:51,763 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:51,776 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:51,809 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:51,809 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:51,809 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:51,809 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:51,809 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:51,810 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:51,810 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:51,810 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-14 22:02:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 22:02:51,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:51,849 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] [2019-10-14 22:02:51,851 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1047931325, now seen corresponding path program 1 times [2019-10-14 22:02:51,869 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:51,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67238242] [2019-10-14 22:02:51,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:51,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:51,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:52,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67238242] [2019-10-14 22:02:52,271 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:52,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:52,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882406852] [2019-10-14 22:02:52,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:52,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:52,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:52,296 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-14 22:02:58,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:58,877 INFO L93 Difference]: Finished difference Result 1575 states and 2878 transitions. [2019-10-14 22:02:58,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:58,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-10-14 22:02:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:58,912 INFO L225 Difference]: With dead ends: 1575 [2019-10-14 22:02:58,913 INFO L226 Difference]: Without dead ends: 1055 [2019-10-14 22:02:58,922 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 [2019-10-14 22:02:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2019-10-14 22:02:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1024. [2019-10-14 22:02:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2019-10-14 22:02:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1749 transitions. [2019-10-14 22:02:59,055 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1749 transitions. Word has length 29 [2019-10-14 22:02:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:59,056 INFO L462 AbstractCegarLoop]: Abstraction has 1024 states and 1749 transitions. [2019-10-14 22:02:59,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1749 transitions. [2019-10-14 22:02:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 22:02:59,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:59,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:59,062 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash 273136762, now seen corresponding path program 1 times [2019-10-14 22:02:59,063 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:59,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572633042] [2019-10-14 22:02:59,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:59,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:59,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:59,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572633042] [2019-10-14 22:02:59,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45430176] [2019-10-14 22:02:59,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:59,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:59,567 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:59,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:59,569 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846144710] [2019-10-14 22:02:59,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:59,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:59,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:59,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:59,576 INFO L87 Difference]: Start difference. First operand 1024 states and 1749 transitions. Second operand 3 states. [2019-10-14 22:03:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:01,933 INFO L93 Difference]: Finished difference Result 2976 states and 5156 transitions. [2019-10-14 22:03:01,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:03:01,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2019-10-14 22:03:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:01,948 INFO L225 Difference]: With dead ends: 2976 [2019-10-14 22:03:01,948 INFO L226 Difference]: Without dead ends: 1958 [2019-10-14 22:03:01,953 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2019-10-14 22:03:02,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955. [2019-10-14 22:03:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2019-10-14 22:03:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2868 transitions. [2019-10-14 22:03:02,047 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2868 transitions. Word has length 98 [2019-10-14 22:03:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:02,048 INFO L462 AbstractCegarLoop]: Abstraction has 1955 states and 2868 transitions. [2019-10-14 22:03:02,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:03:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2868 transitions. [2019-10-14 22:03:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-14 22:03:02,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:02,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:02,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:02,268 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:02,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:02,269 INFO L82 PathProgramCache]: Analyzing trace with hash -384198940, now seen corresponding path program 1 times [2019-10-14 22:03:02,269 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:02,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793326747] [2019-10-14 22:03:02,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:02,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:02,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:02,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793326747] [2019-10-14 22:03:02,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:02,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:03:02,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685784275] [2019-10-14 22:03:02,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:03:02,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:02,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:03:02,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:03:02,542 INFO L87 Difference]: Start difference. First operand 1955 states and 2868 transitions. Second operand 8 states. [2019-10-14 22:03:10,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:10,034 INFO L93 Difference]: Finished difference Result 5861 states and 8774 transitions. [2019-10-14 22:03:10,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:03:10,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 115 [2019-10-14 22:03:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:10,061 INFO L225 Difference]: With dead ends: 5861 [2019-10-14 22:03:10,062 INFO L226 Difference]: Without dead ends: 3912 [2019-10-14 22:03:10,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:03:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2019-10-14 22:03:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2934. [2019-10-14 22:03:10,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-10-14 22:03:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4016 transitions. [2019-10-14 22:03:10,190 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4016 transitions. Word has length 115 [2019-10-14 22:03:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:10,191 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 4016 transitions. [2019-10-14 22:03:10,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:03:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4016 transitions. [2019-10-14 22:03:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-10-14 22:03:10,196 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:10,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:10,197 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:10,197 INFO L82 PathProgramCache]: Analyzing trace with hash -450063927, now seen corresponding path program 1 times [2019-10-14 22:03:10,198 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:10,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495071763] [2019-10-14 22:03:10,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:10,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:10,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:03:11,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495071763] [2019-10-14 22:03:11,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407972054] [2019-10-14 22:03:11,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:11,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 22:03:11,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:03:11,368 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:11,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 22:03:11,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203687495] [2019-10-14 22:03:11,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:03:11,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:11,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:03:11,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:03:11,371 INFO L87 Difference]: Start difference. First operand 2934 states and 4016 transitions. Second operand 8 states. [2019-10-14 22:03:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:20,135 INFO L93 Difference]: Finished difference Result 10289 states and 14532 transitions. [2019-10-14 22:03:20,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:03:20,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 303 [2019-10-14 22:03:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:20,173 INFO L225 Difference]: With dead ends: 10289 [2019-10-14 22:03:20,173 INFO L226 Difference]: Without dead ends: 7361 [2019-10-14 22:03:20,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:03:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7361 states. [2019-10-14 22:03:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7361 to 6723. [2019-10-14 22:03:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6723 states. [2019-10-14 22:03:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 9046 transitions. [2019-10-14 22:03:20,353 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 9046 transitions. Word has length 303 [2019-10-14 22:03:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:20,354 INFO L462 AbstractCegarLoop]: Abstraction has 6723 states and 9046 transitions. [2019-10-14 22:03:20,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:03:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 9046 transitions. [2019-10-14 22:03:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2019-10-14 22:03:20,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:20,365 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:20,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:20,569 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:20,570 INFO L82 PathProgramCache]: Analyzing trace with hash -412853253, now seen corresponding path program 1 times [2019-10-14 22:03:20,571 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:20,571 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554918748] [2019-10-14 22:03:20,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:20,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:20,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 231 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 22:03:21,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554918748] [2019-10-14 22:03:21,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602378739] [2019-10-14 22:03:21,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:21,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:21,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 233 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:03:21,365 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:21,366 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:03:21,366 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932156342] [2019-10-14 22:03:21,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:03:21,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:03:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:03:21,368 INFO L87 Difference]: Start difference. First operand 6723 states and 9046 transitions. Second operand 11 states.