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/Problem14_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:01:49,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:01:49,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:01:49,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:01:49,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:01:49,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:01:49,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:01:49,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:01:49,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:01:49,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:01:49,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:01:49,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:01:49,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:01:49,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:01:49,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:01:49,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:01:49,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:01:49,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:01:49,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:01:49,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:01:49,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:01:49,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:01:49,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:01:49,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:01:49,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:01:49,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:01:49,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:01:49,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:01:49,265 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 22:01:49,281 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:01:49,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:01:49,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:01:49,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:01:49,284 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:01:49,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:01:49,287 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:01:49,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:01:49,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:01:49,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:01:49,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:01:49,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:01:49,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:01:49,288 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:01:49,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:01:49,288 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:01:49,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:01:49,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:01:49,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:01:49,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:01:49,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:01:49,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:49,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:01:49,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:01:49,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:01:49,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:01:49,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:01:49,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:01:49,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:01:49,581 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:01:49,593 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:01:49,597 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:01:49,598 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:01:49,598 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:01:49,599 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label28.c [2019-10-14 22:01:49,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538ca532/4899261ecc8a47af88620839b85f307d/FLAG4fe0949c7 [2019-10-14 22:01:50,238 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:01:50,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label28.c [2019-10-14 22:01:50,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538ca532/4899261ecc8a47af88620839b85f307d/FLAG4fe0949c7 [2019-10-14 22:01:50,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538ca532/4899261ecc8a47af88620839b85f307d [2019-10-14 22:01:50,550 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:01:50,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:01:50,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:50,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:01:50,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:01:50,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:50" (1/1) ... [2019-10-14 22:01:50,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@686a9748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:50, skipping insertion in model container [2019-10-14 22:01:50,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:50" (1/1) ... [2019-10-14 22:01:50,571 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:01:50,634 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:01:51,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:51,218 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:01:51,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:51,403 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:01:51,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51 WrapperNode [2019-10-14 22:01:51,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:51,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:01:51,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:01:51,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:01:51,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51" (1/1) ... [2019-10-14 22:01:51,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51" (1/1) ... [2019-10-14 22:01:51,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51" (1/1) ... [2019-10-14 22:01:51,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51" (1/1) ... [2019-10-14 22:01:51,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51" (1/1) ... [2019-10-14 22:01:51,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51" (1/1) ... [2019-10-14 22:01:51,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51" (1/1) ... [2019-10-14 22:01:51,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:01:51,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:01:51,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:01:51,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:01:51,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51" (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 22:01:51,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:01:51,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:01:51,659 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:01:51,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:01:51,660 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:01:51,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:01:51,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:01:51,661 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:01:51,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:01:51,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:01:51,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:01:53,118 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:01:53,120 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:01:53,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:53 BoogieIcfgContainer [2019-10-14 22:01:53,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:01:53,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:01:53,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:01:53,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:01:53,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:01:50" (1/3) ... [2019-10-14 22:01:53,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690e306f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:53, skipping insertion in model container [2019-10-14 22:01:53,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51" (2/3) ... [2019-10-14 22:01:53,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690e306f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:53, skipping insertion in model container [2019-10-14 22:01:53,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:53" (3/3) ... [2019-10-14 22:01:53,133 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label28.c [2019-10-14 22:01:53,154 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:01:53,170 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:01:53,183 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:01:53,216 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:01:53,216 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:01:53,217 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:01:53,217 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:01:53,217 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:01:53,217 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:01:53,218 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:01:53,218 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:01:53,242 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:01:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 22:01:53,249 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:53,250 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:53,252 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:53,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1694474349, now seen corresponding path program 1 times [2019-10-14 22:01:53,268 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:53,268 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864172612] [2019-10-14 22:01:53,269 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:53,269 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:53,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:53,589 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 22:01:53,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864172612] [2019-10-14 22:01:53,591 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:53,591 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:01:53,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101073139] [2019-10-14 22:01:53,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:53,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:53,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:53,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:53,622 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:01:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:56,587 INFO L93 Difference]: Finished difference Result 902 states and 1625 transitions. [2019-10-14 22:01:56,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:01:56,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-10-14 22:01:56,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:56,619 INFO L225 Difference]: With dead ends: 902 [2019-10-14 22:01:56,619 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:01:56,633 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 22:01:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:01:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 376. [2019-10-14 22:01:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-10-14 22:01:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-10-14 22:01:56,718 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 16 [2019-10-14 22:01:56,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:56,719 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-10-14 22:01:56,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-10-14 22:01:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 22:01:56,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:56,725 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:01:56,725 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1881013151, now seen corresponding path program 1 times [2019-10-14 22:01:56,726 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:56,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340224126] [2019-10-14 22:01:56,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:56,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:56,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:57,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340224126] [2019-10-14 22:01:57,307 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:57,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:01:57,307 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619291596] [2019-10-14 22:01:57,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:01:57,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:57,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:01:57,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:57,312 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 9 states. [2019-10-14 22:01:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:59,113 INFO L93 Difference]: Finished difference Result 970 states and 1372 transitions. [2019-10-14 22:01:59,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 22:01:59,113 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 99 [2019-10-14 22:01:59,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:59,120 INFO L225 Difference]: With dead ends: 970 [2019-10-14 22:01:59,120 INFO L226 Difference]: Without dead ends: 600 [2019-10-14 22:01:59,123 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:01:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-14 22:01:59,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 566. [2019-10-14 22:01:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-14 22:01:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 747 transitions. [2019-10-14 22:01:59,174 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 747 transitions. Word has length 99 [2019-10-14 22:01:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:59,175 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 747 transitions. [2019-10-14 22:01:59,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:01:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 747 transitions. [2019-10-14 22:01:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 22:01:59,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:59,181 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:01:59,181 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:59,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2144779955, now seen corresponding path program 1 times [2019-10-14 22:01:59,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:59,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992685551] [2019-10-14 22:01:59,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:59,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:59,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:59,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992685551] [2019-10-14 22:01:59,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052333058] [2019-10-14 22:01:59,381 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 22:01:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:59,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:59,541 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:59,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 22:01:59,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365100613] [2019-10-14 22:01:59,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:59,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:59,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:59,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:01:59,543 INFO L87 Difference]: Start difference. First operand 566 states and 747 transitions. Second operand 3 states. [2019-10-14 22:02:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:00,477 INFO L93 Difference]: Finished difference Result 1678 states and 2248 transitions. [2019-10-14 22:02:00,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:00,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-14 22:02:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:00,484 INFO L225 Difference]: With dead ends: 1678 [2019-10-14 22:02:00,484 INFO L226 Difference]: Without dead ends: 1118 [2019-10-14 22:02:00,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2019-10-14 22:02:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2019-10-14 22:02:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1118 states. [2019-10-14 22:02:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1443 transitions. [2019-10-14 22:02:00,534 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1443 transitions. Word has length 125 [2019-10-14 22:02:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:00,534 INFO L462 AbstractCegarLoop]: Abstraction has 1118 states and 1443 transitions. [2019-10-14 22:02:00,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1443 transitions. [2019-10-14 22:02:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 22:02:00,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:00,548 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:02:00,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:00,752 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash 386406922, now seen corresponding path program 1 times [2019-10-14 22:02:00,754 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:00,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956088142] [2019-10-14 22:02:00,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:00,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:00,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:01,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956088142] [2019-10-14 22:02:01,131 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:01,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:02:01,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910248060] [2019-10-14 22:02:01,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:02:01,134 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:01,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:02:01,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:01,135 INFO L87 Difference]: Start difference. First operand 1118 states and 1443 transitions. Second operand 9 states. [2019-10-14 22:02:03,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:03,160 INFO L93 Difference]: Finished difference Result 2654 states and 3666 transitions. [2019-10-14 22:02:03,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:02:03,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 156 [2019-10-14 22:02:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:03,177 INFO L225 Difference]: With dead ends: 2654 [2019-10-14 22:02:03,177 INFO L226 Difference]: Without dead ends: 1724 [2019-10-14 22:02:03,181 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:02:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2019-10-14 22:02:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1694. [2019-10-14 22:02:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1694 states. [2019-10-14 22:02:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2162 transitions. [2019-10-14 22:02:03,258 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2162 transitions. Word has length 156 [2019-10-14 22:02:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:03,259 INFO L462 AbstractCegarLoop]: Abstraction has 1694 states and 2162 transitions. [2019-10-14 22:02:03,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:02:03,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2162 transitions. [2019-10-14 22:02:03,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-14 22:02:03,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:03,264 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:03,265 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:03,265 INFO L82 PathProgramCache]: Analyzing trace with hash -380685670, now seen corresponding path program 1 times [2019-10-14 22:02:03,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:03,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845025176] [2019-10-14 22:02:03,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:03,268 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:03,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:04,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845025176] [2019-10-14 22:02:04,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081125924] [2019-10-14 22:02:04,332 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 22:02:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:04,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:04,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:04,685 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:04,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2019-10-14 22:02:04,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239176554] [2019-10-14 22:02:04,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:04,687 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:04,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:04,688 INFO L87 Difference]: Start difference. First operand 1694 states and 2162 transitions. Second operand 16 states. [2019-10-14 22:02:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:08,718 INFO L93 Difference]: Finished difference Result 3704 states and 4746 transitions. [2019-10-14 22:02:08,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 22:02:08,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 183 [2019-10-14 22:02:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:08,728 INFO L225 Difference]: With dead ends: 3704 [2019-10-14 22:02:08,728 INFO L226 Difference]: Without dead ends: 2151 [2019-10-14 22:02:08,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 22:02:08,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2019-10-14 22:02:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2072. [2019-10-14 22:02:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2072 states. [2019-10-14 22:02:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2443 transitions. [2019-10-14 22:02:08,803 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2443 transitions. Word has length 183 [2019-10-14 22:02:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:08,805 INFO L462 AbstractCegarLoop]: Abstraction has 2072 states and 2443 transitions. [2019-10-14 22:02:08,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:02:08,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2443 transitions. [2019-10-14 22:02:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2019-10-14 22:02:08,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:08,811 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 22:02:09,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:09,016 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:09,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1313841146, now seen corresponding path program 1 times [2019-10-14 22:02:09,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:09,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102589240] [2019-10-14 22:02:09,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:09,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:09,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 22:02:09,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102589240] [2019-10-14 22:02:09,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466941509] [2019-10-14 22:02:09,815 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 22:02:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:09,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:10,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-14 22:02:10,211 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:10,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-14 22:02:10,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041178900] [2019-10-14 22:02:10,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:02:10,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:10,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:02:10,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:10,216 INFO L87 Difference]: Start difference. First operand 2072 states and 2443 transitions. Second operand 9 states. [2019-10-14 22:02:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:12,392 INFO L93 Difference]: Finished difference Result 5068 states and 6144 transitions. [2019-10-14 22:02:12,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:02:12,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 318 [2019-10-14 22:02:12,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:12,409 INFO L225 Difference]: With dead ends: 5068 [2019-10-14 22:02:12,409 INFO L226 Difference]: Without dead ends: 3184 [2019-10-14 22:02:12,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:02:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2019-10-14 22:02:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 3002. [2019-10-14 22:02:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3002 states. [2019-10-14 22:02:12,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 3587 transitions. [2019-10-14 22:02:12,492 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 3587 transitions. Word has length 318 [2019-10-14 22:02:12,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:12,493 INFO L462 AbstractCegarLoop]: Abstraction has 3002 states and 3587 transitions. [2019-10-14 22:02:12,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:02:12,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 3587 transitions. [2019-10-14 22:02:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2019-10-14 22:02:12,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:12,501 INFO L380 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:12,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:12,705 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:12,705 INFO L82 PathProgramCache]: Analyzing trace with hash -962923323, now seen corresponding path program 1 times [2019-10-14 22:02:12,705 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:12,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872546652] [2019-10-14 22:02:12,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:12,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:12,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-14 22:02:13,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872546652] [2019-10-14 22:02:13,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42316590] [2019-10-14 22:02:13,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:13,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:13,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:02:13,353 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:13,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 22:02:13,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88131858] [2019-10-14 22:02:13,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:13,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:13,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:13,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:13,356 INFO L87 Difference]: Start difference. First operand 3002 states and 3587 transitions. Second operand 3 states. [2019-10-14 22:02:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:14,061 INFO L93 Difference]: Finished difference Result 3916 states and 4649 transitions. [2019-10-14 22:02:14,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:14,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 397 [2019-10-14 22:02:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:14,083 INFO L225 Difference]: With dead ends: 3916 [2019-10-14 22:02:14,084 INFO L226 Difference]: Without dead ends: 3914 [2019-10-14 22:02:14,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2019-10-14 22:02:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3186. [2019-10-14 22:02:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2019-10-14 22:02:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3827 transitions. [2019-10-14 22:02:14,171 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3827 transitions. Word has length 397 [2019-10-14 22:02:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:14,172 INFO L462 AbstractCegarLoop]: Abstraction has 3186 states and 3827 transitions. [2019-10-14 22:02:14,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3827 transitions. [2019-10-14 22:02:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2019-10-14 22:02:14,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:14,181 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 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] [2019-10-14 22:02:14,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:14,396 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1507246003, now seen corresponding path program 1 times [2019-10-14 22:02:14,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:14,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12463695] [2019-10-14 22:02:14,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:14,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:14,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 288 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-10-14 22:02:15,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12463695] [2019-10-14 22:02:15,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716735599] [2019-10-14 22:02:15,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:02:15,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:15,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-14 22:02:15,578 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:15,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:02:15,579 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608650964] [2019-10-14 22:02:15,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:02:15,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:15,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:02:15,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:15,581 INFO L87 Difference]: Start difference. First operand 3186 states and 3827 transitions. Second operand 12 states. [2019-10-14 22:02:17,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:17,849 INFO L93 Difference]: Finished difference Result 6468 states and 7794 transitions. [2019-10-14 22:02:17,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:02:17,850 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 402 [2019-10-14 22:02:17,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:17,863 INFO L225 Difference]: With dead ends: 6468 [2019-10-14 22:02:17,863 INFO L226 Difference]: Without dead ends: 3431 [2019-10-14 22:02:17,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 419 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:02:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2019-10-14 22:02:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 3186. [2019-10-14 22:02:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2019-10-14 22:02:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3651 transitions. [2019-10-14 22:02:17,943 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3651 transitions. Word has length 402 [2019-10-14 22:02:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:17,944 INFO L462 AbstractCegarLoop]: Abstraction has 3186 states and 3651 transitions. [2019-10-14 22:02:17,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:02:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3651 transitions. [2019-10-14 22:02:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2019-10-14 22:02:17,952 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:17,953 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:18,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:18,161 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:18,162 INFO L82 PathProgramCache]: Analyzing trace with hash 386822599, now seen corresponding path program 2 times [2019-10-14 22:02:18,163 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:18,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435634852] [2019-10-14 22:02:18,170 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:18,170 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:18,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 485 proven. 20 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 22:02:19,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435634852] [2019-10-14 22:02:19,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971345556] [2019-10-14 22:02:19,045 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-14 22:02:19,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 22:02:19,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 22:02:19,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:19,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:19,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:02:19,494 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:19,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-14 22:02:19,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533339980] [2019-10-14 22:02:19,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 22:02:19,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:19,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 22:02:19,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:02:19,497 INFO L87 Difference]: Start difference. First operand 3186 states and 3651 transitions. Second operand 17 states. [2019-10-14 22:02:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:25,727 INFO L93 Difference]: Finished difference Result 6242 states and 7251 transitions. [2019-10-14 22:02:25,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-14 22:02:25,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 428 [2019-10-14 22:02:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:25,742 INFO L225 Difference]: With dead ends: 6242 [2019-10-14 22:02:25,742 INFO L226 Difference]: Without dead ends: 3244 [2019-10-14 22:02:25,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 469 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=598, Invalid=2594, Unknown=0, NotChecked=0, Total=3192 [2019-10-14 22:02:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2019-10-14 22:02:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 2830. [2019-10-14 22:02:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2830 states. [2019-10-14 22:02:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 3160 transitions. [2019-10-14 22:02:25,832 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 3160 transitions. Word has length 428 [2019-10-14 22:02:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:25,833 INFO L462 AbstractCegarLoop]: Abstraction has 2830 states and 3160 transitions. [2019-10-14 22:02:25,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 22:02:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 3160 transitions. [2019-10-14 22:02:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2019-10-14 22:02:25,844 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:25,845 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]